Kaynağa Gözat

cmake: build and install man pages through wikiheaders.pl

Anonymous Maarten 3 ay önce
ebeveyn
işleme
8cc3740648

+ 1 - 0
.github/workflows/main.yml

@@ -31,6 +31,7 @@ jobs:
         cmake -B build -GNinja \
           -DCMAKE_BUILD_TYPE=Release \
           -DCMAKE_INSTALL_PREFIX=prefix_cmake \
+          -DPHYSFS_INSTALL_MAN=ON \
           ${{ matrix.platform.flags }}
     - name: Build (CMake)
       run: |

+ 15 - 0
CMakeLists.txt

@@ -15,7 +15,11 @@ cmake_minimum_required(VERSION 3.5...4.0)
 
 project(PhysicsFS VERSION ${PHYSFS_VERSION} LANGUAGES C )
 
+include(CMakeDependentOption)
 include(GNUInstallDirs)
+include("${PROJECT_SOURCE_DIR}/extras/GetGitRevisionDescription.cmake")
+include("${PROJECT_SOURCE_DIR}/extras/PrivateSdlFunctions.cmake")
+include("${PROJECT_SOURCE_DIR}/extras/sdlmanpages.cmake")
 
 # Increment this if/when we break backwards compatibility.
 set(PHYSFS_SOVERSION 1)
@@ -256,6 +260,7 @@ if(PHYSFS_BUILD_TEST)
 endif()
 
 option(PHYSFS_INSTALL "Enable PhysFS installation" ON)
+cmake_dependent_option(PHYSFS_INSTALL_MAN "Install man pages for PhysicsFS" OFF "PHYSFS_INSTALL" OFF)
 if(PHYSFS_INSTALL)
     if(MSVC)
         set(PHYSFS_INSTALL_CMAKEDIR "cmake")
@@ -326,6 +331,16 @@ if(PHYSFS_INSTALL)
             DESTINATION "${CMAKE_INSTALL_LIBDIR}/pkgconfig"
         )
     endif()
+
+    if(PHYSFS_INSTALL_MAN)
+        sdl_get_git_revision_hash(PHYSFS_REVISION)
+        SDL_generate_manpages(
+            HEADERS_DIR "${PROJECT_SOURCE_DIR}/src/physfs.h"
+            SYMBOL "PHYSFS_init"
+            WIKIHEADERS_PL_PATH "${PROJECT_SOURCE_DIR}/extras/wikiheaders.pl"
+            REVISION "${PHYSFS_REVISION}"
+        )
+    endif()
 endif()
 
 option(PHYSFS_BUILD_DOCS "Build doxygen based documentation" TRUE)

+ 284 - 0
extras/GetGitRevisionDescription.cmake

@@ -0,0 +1,284 @@
+# - Returns a version string from Git
+#
+# These functions force a re-configure on each git commit so that you can
+# trust the values of the variables in your build system.
+#
+#  get_git_head_revision(<refspecvar> <hashvar> [ALLOW_LOOKING_ABOVE_CMAKE_SOURCE_DIR])
+#
+# Returns the refspec and sha hash of the current head revision
+#
+#  git_describe(<var> [<additional arguments to git describe> ...])
+#
+# Returns the results of git describe on the source tree, and adjusting
+# the output so that it tests false if an error occurs.
+#
+#  git_describe_working_tree(<var> [<additional arguments to git describe> ...])
+#
+# Returns the results of git describe on the working tree (--dirty option),
+# and adjusting the output so that it tests false if an error occurs.
+#
+#  git_get_exact_tag(<var> [<additional arguments to git describe> ...])
+#
+# Returns the results of git describe --exact-match on the source tree,
+# and adjusting the output so that it tests false if there was no exact
+# matching tag.
+#
+#  git_local_changes(<var>)
+#
+# Returns either "CLEAN" or "DIRTY" with respect to uncommitted changes.
+# Uses the return code of "git diff-index --quiet HEAD --".
+# Does not regard untracked files.
+#
+# Requires CMake 2.6 or newer (uses the 'function' command)
+#
+# Original Author:
+# 2009-2020 Ryan Pavlik <ryan.pavlik@gmail.com> <abiryan@ryand.net>
+# http://academic.cleardefinition.com
+#
+# Copyright 2009-2013, Iowa State University.
+# Copyright 2013-2020, Ryan Pavlik
+# Copyright 2013-2020, Contributors
+# SPDX-License-Identifier: BSL-1.0
+# Distributed under the Boost Software License, Version 1.0.
+# (See accompanying file LICENSE_1_0.txt or copy at
+# http://www.boost.org/LICENSE_1_0.txt)
+
+if(__get_git_revision_description)
+    return()
+endif()
+set(__get_git_revision_description YES)
+
+# We must run the following at "include" time, not at function call time,
+# to find the path to this module rather than the path to a calling list file
+get_filename_component(_gitdescmoddir ${CMAKE_CURRENT_LIST_FILE} PATH)
+
+# Function _git_find_closest_git_dir finds the next closest .git directory
+# that is part of any directory in the path defined by _start_dir.
+# The result is returned in the parent scope variable whose name is passed
+# as variable _git_dir_var. If no .git directory can be found, the
+# function returns an empty string via _git_dir_var.
+#
+# Example: Given a path C:/bla/foo/bar and assuming C:/bla/.git exists and
+# neither foo nor bar contain a file/directory .git. This will return
+# C:/bla/.git
+#
+function(_git_find_closest_git_dir _start_dir _git_dir_var)
+    set(cur_dir "${_start_dir}")
+    set(git_dir "${_start_dir}/.git")
+    while(NOT EXISTS "${git_dir}")
+        # .git dir not found, search parent directories
+        set(git_previous_parent "${cur_dir}")
+        get_filename_component(cur_dir "${cur_dir}" DIRECTORY)
+        if(cur_dir STREQUAL git_previous_parent)
+            # We have reached the root directory, we are not in git
+            set(${_git_dir_var}
+                ""
+                PARENT_SCOPE)
+            return()
+        endif()
+        set(git_dir "${cur_dir}/.git")
+    endwhile()
+    set(${_git_dir_var}
+        "${git_dir}"
+        PARENT_SCOPE)
+endfunction()
+
+function(get_git_head_revision _refspecvar _hashvar)
+    _git_find_closest_git_dir("${CMAKE_CURRENT_SOURCE_DIR}" GIT_DIR)
+
+    if("${ARGN}" STREQUAL "ALLOW_LOOKING_ABOVE_CMAKE_SOURCE_DIR")
+        set(ALLOW_LOOKING_ABOVE_CMAKE_SOURCE_DIR TRUE)
+    else()
+        set(ALLOW_LOOKING_ABOVE_CMAKE_SOURCE_DIR FALSE)
+    endif()
+    if(NOT "${GIT_DIR}" STREQUAL "")
+        file(RELATIVE_PATH _relative_to_source_dir "${CMAKE_SOURCE_DIR}"
+             "${GIT_DIR}")
+        if("${_relative_to_source_dir}" MATCHES "[.][.]" AND NOT ALLOW_LOOKING_ABOVE_CMAKE_SOURCE_DIR)
+            # We've gone above the CMake root dir.
+            set(GIT_DIR "")
+        endif()
+    endif()
+    if("${GIT_DIR}" STREQUAL "")
+        set(${_refspecvar}
+            "GITDIR-NOTFOUND"
+            PARENT_SCOPE)
+        set(${_hashvar}
+            "GITDIR-NOTFOUND"
+            PARENT_SCOPE)
+        return()
+    endif()
+
+    # Check if the current source dir is a git submodule or a worktree.
+    # In both cases .git is a file instead of a directory.
+    #
+    if(NOT IS_DIRECTORY ${GIT_DIR})
+        # The following git command will return a non empty string that
+        # points to the super project working tree if the current
+        # source dir is inside a git submodule.
+        # Otherwise the command will return an empty string.
+        #
+        execute_process(
+            COMMAND "${GIT_EXECUTABLE}" rev-parse
+                    --show-superproject-working-tree
+            WORKING_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}"
+            OUTPUT_VARIABLE out
+            ERROR_QUIET OUTPUT_STRIP_TRAILING_WHITESPACE)
+        if(NOT "${out}" STREQUAL "")
+            # If out is empty, GIT_DIR/CMAKE_CURRENT_SOURCE_DIR is in a submodule
+            file(READ ${GIT_DIR} submodule)
+            string(REGEX REPLACE "gitdir: (.*)$" "\\1" GIT_DIR_RELATIVE
+                                 ${submodule})
+            string(STRIP ${GIT_DIR_RELATIVE} GIT_DIR_RELATIVE)
+            get_filename_component(SUBMODULE_DIR ${GIT_DIR} PATH)
+            get_filename_component(GIT_DIR ${SUBMODULE_DIR}/${GIT_DIR_RELATIVE}
+                                   ABSOLUTE)
+            set(HEAD_SOURCE_FILE "${GIT_DIR}/HEAD")
+        else()
+            # GIT_DIR/CMAKE_CURRENT_SOURCE_DIR is in a worktree
+            file(READ ${GIT_DIR} worktree_ref)
+            # The .git directory contains a path to the worktree information directory
+            # inside the parent git repo of the worktree.
+            #
+            string(REGEX REPLACE "gitdir: (.*)$" "\\1" git_worktree_dir
+                                 ${worktree_ref})
+            string(STRIP ${git_worktree_dir} git_worktree_dir)
+            _git_find_closest_git_dir("${git_worktree_dir}" GIT_DIR)
+            set(HEAD_SOURCE_FILE "${git_worktree_dir}/HEAD")
+        endif()
+    else()
+        set(HEAD_SOURCE_FILE "${GIT_DIR}/HEAD")
+    endif()
+    set(GIT_DATA "${CMAKE_CURRENT_BINARY_DIR}/CMakeFiles/git-data")
+    if(NOT EXISTS "${GIT_DATA}")
+        file(MAKE_DIRECTORY "${GIT_DATA}")
+    endif()
+
+    if(NOT EXISTS "${HEAD_SOURCE_FILE}")
+        return()
+    endif()
+    set(HEAD_FILE "${GIT_DATA}/HEAD")
+    configure_file("${HEAD_SOURCE_FILE}" "${HEAD_FILE}" COPYONLY)
+
+    configure_file("${_gitdescmoddir}/GetGitRevisionDescription.cmake.in"
+                   "${GIT_DATA}/grabRef.cmake" @ONLY)
+    include("${GIT_DATA}/grabRef.cmake")
+
+    set(${_refspecvar}
+        "${HEAD_REF}"
+        PARENT_SCOPE)
+    set(${_hashvar}
+        "${HEAD_HASH}"
+        PARENT_SCOPE)
+endfunction()
+
+function(git_describe _var)
+    if(NOT GIT_FOUND)
+        find_package(Git QUIET)
+    endif()
+    get_git_head_revision(refspec hash)
+    if(NOT GIT_FOUND)
+        set(${_var}
+            "GIT-NOTFOUND"
+            PARENT_SCOPE)
+        return()
+    endif()
+    if(NOT hash)
+        set(${_var}
+            "HEAD-HASH-NOTFOUND"
+            PARENT_SCOPE)
+        return()
+    endif()
+
+    # TODO sanitize
+    #if((${ARGN}" MATCHES "&&") OR
+    #	(ARGN MATCHES "||") OR
+    #	(ARGN MATCHES "\\;"))
+    #	message("Please report the following error to the project!")
+    #	message(FATAL_ERROR "Looks like someone's doing something nefarious with git_describe! Passed arguments ${ARGN}")
+    #endif()
+
+    #message(STATUS "Arguments to execute_process: ${ARGN}")
+
+    execute_process(
+        COMMAND "${GIT_EXECUTABLE}" describe --tags --always ${hash} ${ARGN}
+        WORKING_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}"
+        RESULT_VARIABLE res
+        OUTPUT_VARIABLE out
+        ERROR_QUIET OUTPUT_STRIP_TRAILING_WHITESPACE)
+    if(NOT res EQUAL 0)
+        set(out "${out}-${res}-NOTFOUND")
+    endif()
+
+    set(${_var}
+        "${out}"
+        PARENT_SCOPE)
+endfunction()
+
+function(git_describe_working_tree _var)
+    if(NOT GIT_FOUND)
+        find_package(Git QUIET)
+    endif()
+    if(NOT GIT_FOUND)
+        set(${_var}
+            "GIT-NOTFOUND"
+            PARENT_SCOPE)
+        return()
+    endif()
+
+    execute_process(
+        COMMAND "${GIT_EXECUTABLE}" describe --dirty ${ARGN}
+        WORKING_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}"
+        RESULT_VARIABLE res
+        OUTPUT_VARIABLE out
+        ERROR_QUIET OUTPUT_STRIP_TRAILING_WHITESPACE)
+    if(NOT res EQUAL 0)
+        set(out "${out}-${res}-NOTFOUND")
+    endif()
+
+    set(${_var}
+        "${out}"
+        PARENT_SCOPE)
+endfunction()
+
+function(git_get_exact_tag _var)
+    git_describe(out --exact-match ${ARGN})
+    set(${_var}
+        "${out}"
+        PARENT_SCOPE)
+endfunction()
+
+function(git_local_changes _var)
+    if(NOT GIT_FOUND)
+        find_package(Git QUIET)
+    endif()
+    get_git_head_revision(refspec hash)
+    if(NOT GIT_FOUND)
+        set(${_var}
+            "GIT-NOTFOUND"
+            PARENT_SCOPE)
+        return()
+    endif()
+    if(NOT hash)
+        set(${_var}
+            "HEAD-HASH-NOTFOUND"
+            PARENT_SCOPE)
+        return()
+    endif()
+
+    execute_process(
+        COMMAND "${GIT_EXECUTABLE}" diff-index --quiet HEAD --
+        WORKING_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}"
+        RESULT_VARIABLE res
+        OUTPUT_VARIABLE out
+        ERROR_QUIET OUTPUT_STRIP_TRAILING_WHITESPACE)
+    if(res EQUAL 0)
+        set(${_var}
+            "CLEAN"
+            PARENT_SCOPE)
+    else()
+        set(${_var}
+            "DIRTY"
+            PARENT_SCOPE)
+    endif()
+endfunction()

+ 43 - 0
extras/GetGitRevisionDescription.cmake.in

@@ -0,0 +1,43 @@
+#
+# Internal file for GetGitRevisionDescription.cmake
+#
+# Requires CMake 2.6 or newer (uses the 'function' command)
+#
+# Original Author:
+# 2009-2010 Ryan Pavlik <rpavlik@iastate.edu> <abiryan@ryand.net>
+# http://academic.cleardefinition.com
+# Iowa State University HCI Graduate Program/VRAC
+#
+# Copyright 2009-2012, Iowa State University
+# Copyright 2011-2015, Contributors
+# Distributed under the Boost Software License, Version 1.0.
+# (See accompanying file LICENSE_1_0.txt or copy at
+# http://www.boost.org/LICENSE_1_0.txt)
+# SPDX-License-Identifier: BSL-1.0
+
+set(HEAD_HASH)
+
+file(READ "@HEAD_FILE@" HEAD_CONTENTS LIMIT 1024)
+
+string(STRIP "${HEAD_CONTENTS}" HEAD_CONTENTS)
+if(HEAD_CONTENTS MATCHES "ref")
+	# named branch
+	string(REPLACE "ref: " "" HEAD_REF "${HEAD_CONTENTS}")
+	if(EXISTS "@GIT_DIR@/${HEAD_REF}")
+		configure_file("@GIT_DIR@/${HEAD_REF}" "@GIT_DATA@/head-ref" COPYONLY)
+	else()
+		configure_file("@GIT_DIR@/packed-refs" "@GIT_DATA@/packed-refs" COPYONLY)
+		file(READ "@GIT_DATA@/packed-refs" PACKED_REFS)
+		if(${PACKED_REFS} MATCHES "([0-9a-z]*) ${HEAD_REF}")
+			set(HEAD_HASH "${CMAKE_MATCH_1}")
+		endif()
+	endif()
+else()
+	# detached HEAD
+	configure_file("@GIT_DIR@/HEAD" "@GIT_DATA@/head-ref" COPYONLY)
+endif()
+
+if(NOT HEAD_HASH)
+	file(READ "@GIT_DATA@/head-ref" HEAD_HASH LIMIT 1024)
+	string(STRIP "${HEAD_HASH}" HEAD_HASH)
+endif()

+ 355 - 0
extras/PrivateSdlFunctions.cmake

@@ -0,0 +1,355 @@
+# This file is shared amongst SDL_image/SDL_mixer/SDL_ttf
+
+include(CheckCCompilerFlag)
+include(CheckCSourceCompiles)
+include(CMakePushCheckState)
+
+macro(sdl_calculate_derived_version_variables MAJOR MINOR MICRO)
+    set(SO_VERSION_MAJOR "0")
+    set(SO_VERSION_MINOR "${MINOR_VERSION}")
+    set(SO_VERSION_MICRO "${MICRO_VERSION}")
+    set(SO_VERSION "${SO_VERSION_MAJOR}.${SO_VERSION_MINOR}.${SO_VERSION_MICRO}")
+
+    if(MINOR MATCHES "[02468]$")
+        math(EXPR DYLIB_COMPAT_VERSION_MAJOR "100 * ${MINOR} + 1")
+        set(DYLIB_COMPAT_VERSION_MINOR "0")
+        math(EXPR DYLIB_CURRENT_VERSION_MAJOR "${DYLIB_COMPAT_VERSION_MAJOR}")
+        set(DYLIB_CURRENT_VERSION_MINOR "${MICRO}")
+    else()
+        math(EXPR DYLIB_COMPAT_VERSION_MAJOR "100 * ${MINOR} + ${MICRO} + 1")
+        set(DYLIB_COMPAT_VERSION_MINOR "0")
+        math(EXPR DYLIB_CURRENT_VERSION_MAJOR "${DYLIB_COMPAT_VERSION_MAJOR}")
+        set(DYLIB_CURRENT_VERSION_MINOR "0")
+    endif()
+    set(DYLIB_COMPAT_VERSION_MICRO "0")
+    set(DYLIB_CURRENT_VERSION_MICRO "0")
+
+    set(DYLIB_CURRENT_VERSION "${DYLIB_CURRENT_VERSION_MAJOR}.${DYLIB_CURRENT_VERSION_MINOR}.${DYLIB_CURRENT_VERSION_MICRO}")
+    set(DYLIB_COMPAT_VERSION "${DYLIB_COMPAT_VERSION_MAJOR}.${DYLIB_COMPAT_VERSION_MINOR}.${DYLIB_COMPAT_VERSION_MICRO}")
+endmacro()
+
+function(read_absolute_symlink DEST PATH)
+    file(READ_SYMLINK "${PATH}" p)
+    if(NOT IS_ABSOLUTE "${p}")
+        get_filename_component(pdir "${PATH}" DIRECTORY)
+        set(p "${pdir}/${p}")
+    endif()
+    get_filename_component(p "${p}" ABSOLUTE)
+    set("${DEST}" "${p}" PARENT_SCOPE)
+endfunction()
+
+function(win32_implib_identify_dll DEST IMPLIB)
+    cmake_parse_arguments(ARGS "NOTFATAL" "" "" ${ARGN})
+    if(CMAKE_DLLTOOL)
+        execute_process(
+            COMMAND "${CMAKE_DLLTOOL}" --identify "${IMPLIB}"
+            RESULT_VARIABLE retcode
+            OUTPUT_VARIABLE stdout
+            ERROR_VARIABLE stderr)
+        if(NOT retcode EQUAL 0)
+            if(NOT ARGS_NOTFATAL)
+                message(FATAL_ERROR "${CMAKE_DLLTOOL} failed.")
+            else()
+                set("${DEST}" "${DEST}-NOTFOUND" PARENT_SCOPE)
+                return()
+            endif()
+        endif()
+        string(STRIP "${stdout}" result)
+        set(${DEST} "${result}" PARENT_SCOPE)
+    elseif(MSVC)
+        get_filename_component(CMAKE_C_COMPILER_DIRECTORY "${CMAKE_C_COMPILER}" DIRECTORY CACHE)
+        find_program(CMAKE_DUMPBIN NAMES dumpbin PATHS "${CMAKE_C_COMPILER_DIRECTORY}")
+        if(CMAKE_DUMPBIN)
+            execute_process(
+                COMMAND "${CMAKE_DUMPBIN}" "-headers" "${IMPLIB}"
+                RESULT_VARIABLE retcode
+                OUTPUT_VARIABLE stdout
+                ERROR_VARIABLE stderr)
+            if(NOT retcode EQUAL 0)
+                if(NOT ARGS_NOTFATAL)
+                    message(FATAL_ERROR "dumpbin failed.")
+                else()
+                    set(${DEST} "${DEST}-NOTFOUND" PARENT_SCOPE)
+                    return()
+                endif()
+            endif()
+            string(REGEX MATCH "DLL name[ ]+:[ ]+([^\n]+)\n" match "${stdout}")
+            if(NOT match)
+                if(NOT ARGS_NOTFATAL)
+                    message(FATAL_ERROR "dumpbin did not find any associated dll for ${IMPLIB}.")
+                else()
+                    set(${DEST} "${DEST}-NOTFOUND" PARENT_SCOPE)
+                    return()
+                endif()
+            endif()
+            set(result "${CMAKE_MATCH_1}")
+            set(${DEST} "${result}" PARENT_SCOPE)
+        else()
+            message(FATAL_ERROR "Cannot find dumpbin, please set CMAKE_DUMPBIN cmake variable")
+        endif()
+    else()
+        if(NOT ARGS_NOTFATAL)
+            message(FATAL_ERROR "Don't know how to identify dll from import library. Set CMAKE_DLLTOOL (for mingw) or CMAKE_DUMPBIN (for MSVC)")
+        else()
+            set(${DEST} "${DEST}-NOTFOUND")
+        endif()
+    endif()
+endfunction()
+
+function(get_actual_target)
+    set(dst "${ARGV0}")
+    set(target "${${dst}}")
+    set(input "${target}")
+    get_target_property(alias "${target}" ALIASED_TARGET)
+    while(alias)
+        set(target "${alias}")
+        get_target_property(alias "${target}" ALIASED_TARGET)
+    endwhile()
+    message(DEBUG "get_actual_target(\"${input}\") -> \"${target}\"")
+    set("${dst}" "${target}" PARENT_SCOPE)
+endfunction()
+
+function(target_get_dynamic_library DEST TARGET)
+    set(result)
+    get_actual_target(TARGET)
+    if(WIN32)
+        # Use the target dll of the import library
+        set(props_to_check IMPORTED_IMPLIB)
+        if(CMAKE_BUILD_TYPE)
+            list(APPEND props_to_check IMPORTED_IMPLIB_${CMAKE_BUILD_TYPE})
+        endif()
+        list(APPEND props_to_check IMPORTED_LOCATION)
+        if(CMAKE_BUILD_TYPE)
+            list(APPEND props_to_check IMPORTED_LOCATION_${CMAKE_BUILD_TYPE})
+        endif()
+        foreach (config_type ${CMAKE_CONFIGURATION_TYPES} RELEASE DEBUG RELWITHDEBINFO MINSIZEREL)
+            list(APPEND props_to_check IMPORTED_IMPLIB_${config_type})
+            list(APPEND props_to_check IMPORTED_LOCATION_${config_type})
+        endforeach()
+
+        foreach(prop_to_check ${props_to_check})
+            if(NOT result)
+                get_target_property(propvalue "${TARGET}" ${prop_to_check})
+                if(propvalue AND EXISTS "${propvalue}")
+                    win32_implib_identify_dll(result "${propvalue}" NOTFATAL)
+                endif()
+            endif()
+        endforeach()
+    else()
+        # 1. find the target library a file might be symbolic linking to
+        # 2. find all other files in the same folder that symolic link to it
+        # 3. sort all these files, and select the 1st item on Linux, and last on Macos
+        set(location_properties IMPORTED_LOCATION)
+        if(CMAKE_BUILD_TYPE)
+            list(APPEND location_properties IMPORTED_LOCATION_${CMAKE_BUILD_TYPE})
+        endif()
+        foreach (config_type ${CMAKE_CONFIGURATION_TYPES} RELEASE DEBUG RELWITHDEBINFO MINSIZEREL)
+            list(APPEND location_properties IMPORTED_LOCATION_${config_type})
+        endforeach()
+        if(APPLE)
+            set(valid_shared_library_regex "\\.[0-9]+\\.dylib$")
+        else()
+            set(valid_shared_library_regex "\\.so\\.([0-9.]+)?[0-9]")
+        endif()
+        foreach(location_property ${location_properties})
+            if(NOT result)
+                get_target_property(library_path "${TARGET}" ${location_property})
+                message(DEBUG "get_target_property(${TARGET} ${location_propert}) -> ${library_path}")
+                if(EXISTS "${library_path}")
+                    get_filename_component(library_path "${library_path}" ABSOLUTE)
+                    while (IS_SYMLINK "${library_path}")
+                        read_absolute_symlink(library_path "${library_path}")
+                    endwhile()
+                    message(DEBUG "${TARGET} -> ${library_path}")
+                    get_filename_component(libdir "${library_path}" DIRECTORY)
+                    file(GLOB subfiles "${libdir}/*")
+                    set(similar_files "${library_path}")
+                    foreach(subfile ${subfiles})
+                        if(IS_SYMLINK "${subfile}")
+                            read_absolute_symlink(subfile_target "${subfile}")
+                            while(IS_SYMLINK "${subfile_target}")
+                                read_absolute_symlink(subfile_target "${subfile_target}")
+                            endwhile()
+                            get_filename_component(subfile_target "${subfile_target}" ABSOLUTE)
+                            if(subfile_target STREQUAL library_path AND subfile MATCHES "${valid_shared_library_regex}")
+                                list(APPEND similar_files "${subfile}")
+                            endif()
+                        endif()
+                    endforeach()
+                    list(SORT similar_files)
+                    message(DEBUG "files that are similar to \"${library_path}\"=${similar_files}")
+                    if(APPLE)
+                        list(REVERSE similar_files)
+                    endif()
+                    list(GET similar_files 0 item)
+                    get_filename_component(result "${item}" NAME)
+                endif()
+            endif()
+        endforeach()
+    endif()
+    if(result)
+        string(TOLOWER "${result}" result_lower)
+        if(WIN32 OR OS2)
+            if(NOT result_lower MATCHES ".*dll")
+                message(FATAL_ERROR "\"${result}\" is not a .dll library")
+            endif()
+        elseif(APPLE)
+            if(NOT result_lower MATCHES ".*dylib.*")
+                message(FATAL_ERROR "\"${result}\" is not a .dylib shared library")
+            endif()
+        else()
+            if(NOT result_lower MATCHES ".*so.*")
+                message(FATAL_ERROR "\"${result}\" is not a .so shared library")
+            endif()
+        endif()
+    else()
+        get_target_property(target_type ${TARGET} TYPE)
+        if(target_type MATCHES "SHARED_LIBRARY|MODULE_LIBRARY")
+            # OK
+        elseif(target_type MATCHES "STATIC_LIBRARY|OBJECT_LIBRARY|INTERFACE_LIBRARY|EXECUTABLE")
+            message(SEND_ERROR "${TARGET} is not a shared library, but has type=${target_type}")
+        else()
+            message(WARNING "Unable to extract dynamic library from target=${TARGET}, type=${target_type}.")
+        endif()
+        # TARGET_SONAME_FILE is not allowed for DLL target platforms.
+        if(WIN32)
+          set(result "$<TARGET_FILE_NAME:${TARGET}>")
+        else()
+          set(result "$<TARGET_SONAME_FILE_NAME:${TARGET}>")
+        endif()
+    endif()
+    set(${DEST} ${result} PARENT_SCOPE)
+endfunction()
+
+function(sdl_check_project_in_subfolder relative_subfolder name vendored_option)
+    cmake_parse_arguments(ARG "" "FILE" "" ${ARGN})
+    if(NOT ARG_FILE)
+        set(ARG_FILE "CMakeLists.txt")
+    endif()
+    if(NOT EXISTS "${PROJECT_SOURCE_DIR}/${relative_subfolder}/${ARG_FILE}")
+        message(FATAL_ERROR "Could not find ${ARG_FILE} for ${name} in ${relative_subfolder}.\n"
+            "Run the download script in the external folder, or re-configure with -D${vendored_option}=OFF to use system packages.")
+    endif()
+endfunction()
+
+macro(sdl_check_linker_flag flag var)
+    # FIXME: Use CheckLinkerFlag module once cmake minimum version >= 3.18
+    cmake_push_check_state(RESET)
+    set(CMAKE_REQUIRED_LINK_OPTIONS "${flag}")
+    check_c_source_compiles("int main() { return 0; }" ${var} FAIL_REGEX "(unsupported|syntax error|unrecognized option)")
+    cmake_pop_check_state()
+endmacro()
+
+function(SDL_detect_linker)
+    if(CMAKE_VERSION VERSION_LESS 3.29)
+        if(NOT DEFINED SDL_CMAKE_C_COMPILER_LINKER_ID)
+            execute_process(COMMAND ${CMAKE_LINKER} -v OUTPUT_VARIABLE LINKER_OUTPUT ERROR_VARIABLE LINKER_OUTPUT)
+            string(REGEX REPLACE "[\r\n]" " " LINKER_OUTPUT "${LINKER_OUTPUT}")
+            if(LINKER_OUTPUT MATCHES ".*Microsoft.*")
+                set(linker MSVC)
+            else()
+                set(linker GNUlike)
+            endif()
+            message(STATUS "Linker identification: ${linker}")
+            set(SDL_CMAKE_C_COMPILER_LINKER_ID "${linker}" CACHE STRING "Linker identification")
+            mark_as_advanced(SDL_CMAKE_C_COMPILER_LINKER_ID)
+        endif()
+        set(CMAKE_C_COMPILER_LINKER_ID "${SDL_CMAKE_C_COMPILER_LINKER_ID}" PARENT_SCOPE)
+    endif()
+endfunction()
+
+function(check_linker_support_version_script VAR)
+    SDL_detect_linker()
+    if(CMAKE_C_COMPILER_LINKER_ID MATCHES "^(MSVC)$")
+        set(LINKER_SUPPORTS_VERSION_SCRIPT FALSE)
+    else()
+        cmake_push_check_state(RESET)
+        file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/dummy.sym" "n_0 {\n global:\n  func;\n local: *;\n};\n")
+        list(APPEND CMAKE_REQUIRED_LINK_OPTIONS "-Wl,--version-script=${CMAKE_CURRENT_BINARY_DIR}/dummy.sym")
+        check_c_source_compiles("int func(void) {return 0;} int main(int argc,char*argv[]){(void)argc;(void)argv;return func();}" LINKER_SUPPORTS_VERSION_SCRIPT FAIL_REGEX "(unsupported|syntax error|unrecognized option)")
+        cmake_pop_check_state()
+    endif()
+    set(${VAR} "${LINKER_SUPPORTS_VERSION_SCRIPT}" PARENT_SCOPE)
+endfunction()
+
+function(sdl_target_link_options_no_undefined TARGET)
+    if(NOT MSVC AND NOT CMAKE_SYSTEM_NAME MATCHES ".*OpenBSD.*")
+        if(CMAKE_C_COMPILER_ID MATCHES "AppleClang")
+            target_link_options(${TARGET} PRIVATE "-Wl,-undefined,error")
+        else()
+            sdl_check_linker_flag("-Wl,--no-undefined" HAVE_WL_NO_UNDEFINED)
+            if(HAVE_WL_NO_UNDEFINED AND NOT ((CMAKE_C_COMPILER_ID MATCHES "Clang") AND WIN32))
+                target_link_options(${TARGET} PRIVATE "-Wl,--no-undefined")
+            endif()
+        endif()
+    endif()
+endfunction()
+
+function(sdl_target_link_option_version_file TARGET VERSION_SCRIPT)
+    check_linker_support_version_script(HAVE_WL_VERSION_SCRIPT)
+    if(HAVE_WL_VERSION_SCRIPT)
+        target_link_options(${TARGET} PRIVATE "-Wl,--version-script=${VERSION_SCRIPT}")
+        set_property(TARGET ${TARGET} APPEND PROPERTY LINK_DEPENDS "${VERSION_SCRIPT}")
+    else()
+        if(LINUX OR ANDROID)
+            message(FATAL_ERROR "Linker does not support '-Wl,--version-script=xxx.sym'. This is required on the current host platform.")
+        endif()
+    endif()
+endfunction()
+
+function(sdl_add_warning_options TARGET)
+    cmake_parse_arguments(ARGS "" "WARNING_AS_ERROR" "" ${ARGN})
+    if(MSVC)
+        target_compile_options(${TARGET} PRIVATE /W2)
+    else()
+        target_compile_options(${TARGET} PRIVATE -Wall)
+    endif()
+    if(ARGS_WARNING_AS_ERROR)
+        if(MSVC)
+            target_compile_options(${TARGET} PRIVATE /WX)
+        else()
+            target_compile_options(${TARGET} PRIVATE -Werror)
+        endif()
+    endif()
+endfunction()
+
+function(sdl_no_deprecated_errors TARGET)
+    check_c_compiler_flag(-Wno-error=deprecated-declarations HAVE_WNO_ERROR_DEPRECATED_DECLARATIONS)
+        if(HAVE_WNO_ERROR_DEPRECATED_DECLARATIONS)
+    target_compile_options(${TARGET} PRIVATE "-Wno-error=deprecated-declarations")
+endif()
+endfunction()
+
+function(sdl_get_git_revision_hash VARNAME)
+    set("${VARNAME}" "" CACHE STRING "${PROJECT_NAME} revision")
+    set(revision "${${VARNAME}}")
+    if(NOT revision)
+      if(EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/VERSION.txt")
+        # If VERSION.txt exists, it contains the SDL version
+        file(READ "${CMAKE_CURRENT_SOURCE_DIR}/VERSION.txt" revision_version)
+        string(STRIP "${revision_version}" revision_version)
+      else()
+        # If VERSION.txt does not exist, use git to calculate a version
+        git_describe(revision_version)
+        if(NOT revision_version)
+          set(revision_version "${PROJECT_VERSION}-no-vcs")
+        endif()
+      endif()
+      set(revision "${revision_version}")
+    endif()
+    set("${VARNAME}" "${revision}" PARENT_SCOPE)
+endfunction()
+
+function(SDL_install_pdb TARGET DIRECTORY)
+    get_property(type TARGET ${TARGET} PROPERTY TYPE)
+    if(type MATCHES "^(SHARED_LIBRARY|EXECUTABLE)$")
+        install(FILES $<TARGET_PDB_FILE:${TARGET}> DESTINATION "${DIRECTORY}" OPTIONAL)
+    elseif(type STREQUAL "STATIC_LIBRARY")
+        # FIXME: Use $<TARGET_COMPILE_PDB_FILE:${TARGET} once it becomes available (https://gitlab.kitware.com/cmake/cmake/-/issues/25244)
+        if(CMAKE_GENERATOR MATCHES "^Visual Studio.*")
+            install(CODE "file(INSTALL DESTINATION \"\${CMAKE_INSTALL_PREFIX}/${DIRECTORY}\" TYPE FILE OPTIONAL FILES \"${CMAKE_CURRENT_BINARY_DIR}/\${CMAKE_INSTALL_CONFIG_NAME}/${TARGET}.pdb\")")
+        else()
+            install(CODE "file(INSTALL DESTINATION \"\${CMAKE_INSTALL_PREFIX}/${DIRECTORY}\" TYPE FILE OPTIONAL FILES \"${CMAKE_CURRENT_BINARY_DIR}/CMakeFiles/${TARGET}.dir/${TARGET}.pdb\")")
+        endif()
+    endif()
+endfunction()

+ 68 - 0
extras/sdlmanpages.cmake

@@ -0,0 +1,68 @@
+include(CMakeParseArguments)
+include(GNUInstallDirs)
+
+function(SDL_generate_manpages)
+  cmake_parse_arguments(ARG "" "RESULT_VARIABLE;NAME;BUILD_DOCDIR;HEADERS_DIR;SOURCE_DIR;SYMBOL;OPTION_FILE;WIKIHEADERS_PL_PATH;REVISION" "" ${ARGN})
+
+  set(wikiheaders_extra_args)
+
+  if(NOT ARG_NAME)
+    set(ARG_NAME "${PROJECT_NAME}")
+  endif()
+
+  if(NOT ARG_SOURCE_DIR)
+    set(ARG_SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}")
+  endif()
+
+  if(NOT ARG_OPTION_FILE)
+    set(ARG_OPTION_FILE "${PROJECT_SOURCE_DIR}/.wikiheaders-options")
+  endif()
+
+  if(NOT ARG_HEADERS_DIR)
+    message(FATAL_ERROR "Missing required HEADERS_DIR argument")
+  endif()
+
+  # FIXME: get rid of SYMBOL and let the perl script figure out the dependencies
+  if(NOT ARG_SYMBOL)
+    message(FATAL_ERROR "Missing required SYMBOL argument")
+  endif()
+
+  if(ARG_REVISION)
+    list(APPEND wikiheaders_extra_args "--rev=${ARG_REVISION}")
+  endif()
+
+  if(NOT ARG_BUILD_DOCDIR)
+    set(ARG_BUILD_DOCDIR "${CMAKE_CURRENT_BINARY_DIR}/docs")
+  endif()
+  set(BUILD_WIKIDIR "${ARG_BUILD_DOCDIR}/wiki")
+  set(BUILD_MANDIR "${ARG_BUILD_DOCDIR}/man")
+
+  find_package(Perl)
+  file(GLOB HEADER_FILES "${ARG_HEADERS_DIR}/*.h")
+
+  set(result FALSE)
+
+  if(PERL_FOUND AND EXISTS "${ARG_WIKIHEADERS_PL_PATH}")
+    add_custom_command(
+      OUTPUT "${BUILD_WIKIDIR}/${ARG_SYMBOL}.md"
+      COMMAND "${CMAKE_COMMAND}" -E make_directory "${BUILD_WIKIDIR}"
+      COMMAND "${PERL_EXECUTABLE}" "${ARG_WIKIHEADERS_PL_PATH}" "${ARG_SOURCE_DIR}" "${BUILD_WIKIDIR}" "--options=${ARG_OPTION_FILE}" --copy-to-wiki ${wikiheaders_extra_args}
+      DEPENDS ${HEADER_FILES} "${ARG_WIKIHEADERS_PL_PATH}" "${ARG_OPTION_FILE}"
+      COMMENT "Generating ${ARG_NAME} wiki markdown files"
+    )
+    add_custom_command(
+      OUTPUT "${BUILD_MANDIR}/man3/${ARG_SYMBOL}.3"
+      COMMAND "${PERL_EXECUTABLE}" "${ARG_WIKIHEADERS_PL_PATH}" "${ARG_SOURCE_DIR}" "${BUILD_WIKIDIR}" "--options=${ARG_OPTION_FILE}" "--manpath=${BUILD_MANDIR}" --copy-to-manpages ${wikiheaders_extra_args}
+      DEPENDS  "${BUILD_WIKIDIR}/${ARG_SYMBOL}.md" "${ARG_WIKIHEADERS_PL_PATH}" "${ARG_OPTION_FILE}"
+      COMMENT "Generating ${ARG_NAME} man pages"
+    )
+    add_custom_target(${ARG_NAME}-docs ALL DEPENDS "${BUILD_MANDIR}/man3/${ARG_SYMBOL}.3")
+
+    install(DIRECTORY "${BUILD_MANDIR}/" DESTINATION "${CMAKE_INSTALL_MANDIR}")
+    set(result TRUE)
+  endif()
+
+  if(ARG_RESULT_VARIABLE)
+    set(${ARG_RESULT_VARIABLE} ${result} PARENT_SCOPE)
+  endif()
+endfunction()

+ 3482 - 0
extras/wikiheaders.pl

@@ -0,0 +1,3482 @@
+#!/usr/bin/perl -w
+
+# Simple DirectMedia Layer
+# Copyright (C) 1997-2025 Sam Lantinga <slouken@libsdl.org>
+#
+# This software is provided 'as-is', without any express or implied
+# warranty.  In no event will the authors be held liable for any damages
+# arising from the use of this software.
+#
+# Permission is granted to anyone to use this software for any purpose,
+# including commercial applications, and to alter it and redistribute it
+# freely, subject to the following restrictions:
+#
+# 1. The origin of this software must not be misrepresented; you must not
+#    claim that you wrote the original software. If you use this software
+#    in a product, an acknowledgment in the product documentation would be
+#    appreciated but is not required.
+# 2. Altered source versions must be plainly marked as such, and must not be
+#    misrepresented as being the original software.
+# 3. This notice may not be removed or altered from any source distribution.
+
+use warnings;
+use strict;
+use File::Path;
+use Text::Wrap;
+
+$Text::Wrap::huge = 'overflow';
+
+my $projectfullname = 'Simple Directmedia Layer';
+my $projectshortname = 'SDL';
+my $wikisubdir = '';
+my $incsubdir = 'include';
+my $readmesubdir = undef;
+my $apiprefixregex = undef;
+my $apipropertyregex = undef;
+my $versionfname = 'include/SDL_version.h';
+my $versionmajorregex = '\A\#define\s+SDL_MAJOR_VERSION\s+(\d+)\Z';
+my $versionminorregex = '\A\#define\s+SDL_MINOR_VERSION\s+(\d+)\Z';
+my $versionmicroregex = '\A\#define\s+SDL_MICRO_VERSION\s+(\d+)\Z';
+my $wikidocsectionsym = 'SDL_WIKI_DOCUMENTATION_SECTION';
+my $forceinlinesym = 'SDL_FORCE_INLINE';
+my $deprecatedsym = 'SDL_DEPRECATED';
+my $declspecsym = '(?:SDLMAIN_|SDL_)?DECLSPEC';
+my $callconvsym = 'SDLCALL';
+my $mainincludefname = 'SDL.h';
+my $selectheaderregex = '\ASDL.*?\.h\Z';
+my $projecturl = 'https://libsdl.org/';
+my $wikiurl = 'https://wiki.libsdl.org';
+my $bugreporturl = 'https://github.com/libsdl-org/sdlwiki/issues/new';
+my $srcpath = undef;
+my $wikipath = undef;
+my $warn_about_missing = 0;
+my $copy_direction = 0;
+my $optionsfname = undef;
+my $wikipreamble = undef;
+my $wikiheaderfiletext = 'Defined in %fname%';
+my $manpageheaderfiletext = 'Defined in %fname%';
+my $manpagesymbolfilterregex = undef;
+my $headercategoryeval = undef;
+my $quickrefenabled = 0;
+my @quickrefcategoryorder;
+my $quickreftitle = undef;
+my $quickrefurl = undef;
+my $quickrefdesc = undef;
+my $quickrefmacroregex = undef;
+my $envvarenabled = 0;
+my $envvartitle = 'Environment Variables';
+my $envvardesc = undef;
+my $envvarsymregex = undef;
+my $envvarsymreplace = undef;
+my $changeformat = undef;
+my $manpath = undef;
+my $gitrev = undef;
+
+foreach (@ARGV) {
+    $warn_about_missing = 1, next if $_ eq '--warn-about-missing';
+    $copy_direction = 1, next if $_ eq '--copy-to-headers';
+    $copy_direction = 1, next if $_ eq '--copy-to-header';
+    $copy_direction = -1, next if $_ eq '--copy-to-wiki';
+    $copy_direction = -2, next if $_ eq '--copy-to-manpages';
+    $copy_direction = -3, next if $_ eq '--report-coverage-gaps';
+    $copy_direction = -4, next if $_ eq '--copy-to-latex';
+    if (/\A--options=(.*)\Z/) {
+        $optionsfname = $1;
+        next;
+    } elsif (/\A--changeformat=(.*)\Z/) {
+        $changeformat = $1;
+        next;
+    } elsif (/\A--manpath=(.*)\Z/) {
+        $manpath = $1;
+        next;
+    } elsif (/\A--rev=(.*)\Z/) {
+        $gitrev = $1;
+        next;
+    }
+    $srcpath = $_, next if not defined $srcpath;
+    $wikipath = $_, next if not defined $wikipath;
+}
+
+my $default_optionsfname = '.wikiheaders-options';
+$default_optionsfname = "$srcpath/$default_optionsfname" if defined $srcpath;
+
+if ((not defined $optionsfname) && (-f $default_optionsfname)) {
+    $optionsfname = $default_optionsfname;
+}
+
+if (defined $optionsfname) {
+    open OPTIONS, '<', $optionsfname or die("Failed to open options file '$optionsfname': $!\n");
+    while (<OPTIONS>) {
+        next if /\A\s*\#/;  # Skip lines that start with (optional whitespace, then) '#' as comments.
+
+        chomp;
+        if (/\A(.*?)\=(.*)\Z/) {
+            my $key = $1;
+            my $val = $2;
+            $key =~ s/\A\s+//;
+            $key =~ s/\s+\Z//;
+            $val =~ s/\A\s+//;
+            $val =~ s/\s+\Z//;
+            $warn_about_missing = int($val), next if $key eq 'warn_about_missing';
+            $srcpath = $val, next if $key eq 'srcpath';
+            $wikipath = $val, next if $key eq 'wikipath';
+            $apiprefixregex = $val, next if $key eq 'apiprefixregex';
+            $apipropertyregex = $val, next if $key eq 'apipropertyregex';
+            $projectfullname = $val, next if $key eq 'projectfullname';
+            $projectshortname = $val, next if $key eq 'projectshortname';
+            $wikisubdir = $val, next if $key eq 'wikisubdir';
+            $incsubdir = $val, next if $key eq 'incsubdir';
+            $readmesubdir = $val, next if $key eq 'readmesubdir';
+            $versionmajorregex = $val, next if $key eq 'versionmajorregex';
+            $versionminorregex = $val, next if $key eq 'versionminorregex';
+            $versionmicroregex = $val, next if $key eq 'versionmicroregex';
+            $versionfname = $val, next if $key eq 'versionfname';
+            $mainincludefname = $val, next if $key eq 'mainincludefname';
+            $selectheaderregex = $val, next if $key eq 'selectheaderregex';
+            $projecturl = $val, next if $key eq 'projecturl';
+            $wikiurl = $val, next if $key eq 'wikiurl';
+            $bugreporturl = $val, next if $key eq 'bugreporturl';
+            $wikipreamble = $val, next if $key eq 'wikipreamble';
+            $wikiheaderfiletext = $val, next if $key eq 'wikiheaderfiletext';
+            $manpageheaderfiletext = $val, next if $key eq 'manpageheaderfiletext';
+            $manpagesymbolfilterregex = $val, next if $key eq 'manpagesymbolfilterregex';
+            $headercategoryeval = $val, next if $key eq 'headercategoryeval';
+            $quickrefenabled = int($val), next if $key eq 'quickrefenabled';
+            @quickrefcategoryorder = split(/,/, $val), next if $key eq 'quickrefcategoryorder';
+            $quickreftitle = $val, next if $key eq 'quickreftitle';
+            $quickrefurl = $val, next if $key eq 'quickrefurl';
+            $quickrefdesc = $val, next if $key eq 'quickrefdesc';
+            $quickrefmacroregex = $val, next if $key eq 'quickrefmacroregex';
+            $envvarenabled = int($val), next if $key eq 'envvarenabled';
+            $envvartitle = $val, next if $key eq 'envvartitle';
+            $envvardesc = $val, next if $key eq 'envvardesc';
+            $envvarsymregex = $val, next if $key eq 'envvarsymregex';
+            $envvarsymreplace = $val, next if $key eq 'envvarsymreplace';
+            $wikidocsectionsym = $val, next if $key eq 'wikidocsectionsym';
+            $forceinlinesym = $val, next if $key eq 'forceinlinesym';
+            $deprecatedsym = $val, next if $key eq 'deprecatedsym';
+            $declspecsym = $val, next if $key eq 'declspecsym';
+            $callconvsym = $val, next if $key eq 'callconvsym';
+
+        }
+    }
+    close(OPTIONS);
+}
+
+sub escLaTeX {
+    my $str = shift;
+    $str =~ s/([_\#\&\^])/\\$1/g;
+    return $str;
+}
+
+my $wordwrap_mode = 'mediawiki';
+sub wordwrap_atom {   # don't call this directly.
+    my $str = shift;
+    my $retval = '';
+
+    # wordwrap but leave links intact, even if they overflow.
+    if ($wordwrap_mode eq 'mediawiki') {
+        while ($str =~ s/(.*?)\s*(\[https?\:\/\/.*?\s+.*?\])\s*//ms) {
+            $retval .= fill('', '', $1); # wrap it.
+            $retval .= "\n$2\n";  # don't wrap it.
+        }
+    } elsif ($wordwrap_mode eq 'md') {
+        while ($str =~ s/(.*?)\s*(\[.*?\]\(https?\:\/\/.*?\))\s*//ms) {
+            $retval .= fill('', '', $1); # wrap it.
+            $retval .= "\n$2\n";  # don't wrap it.
+        }
+    }
+
+    return $retval . fill('', '', $str);
+}
+
+sub wordwrap_with_bullet_indent {  # don't call this directly.
+    my $bullet = shift;
+    my $str = shift;
+    my $retval = '';
+
+    #print("WORDWRAP BULLET ('$bullet'):\n\n$str\n\n");
+
+    # You _can't_ (at least with Pandoc) have a bullet item with a newline in
+    #  MediaWiki, so _remove_ wrapping!
+    if ($wordwrap_mode eq 'mediawiki') {
+        $retval = "$bullet$str";
+        $retval =~ s/\n/ /gms;
+        $retval =~ s/\s+$//gms;
+        #print("WORDWRAP BULLET DONE:\n\n$retval\n\n");
+        return "$retval\n";
+    }
+
+    my $bulletlen = length($bullet);
+
+    # wrap it and then indent each line to be under the bullet.
+    $Text::Wrap::columns -= $bulletlen;
+    my @wrappedlines = split /\n/, wordwrap_atom($str);
+    $Text::Wrap::columns += $bulletlen;
+
+    my $prefix = $bullet;
+    my $usual_prefix = ' ' x $bulletlen;
+
+    foreach (@wrappedlines) {
+        s/\s*\Z//;
+        $retval .= "$prefix$_\n";
+        $prefix = $usual_prefix;
+    }
+
+    return $retval;
+}
+
+sub wordwrap_one_paragraph {  # don't call this directly.
+    my $retval = '';
+    my $p = shift;
+    #print "\n\n\nPARAGRAPH: [$p]\n\n\n";
+    if ($p =~ s/\A([\*\-] )//) {  # bullet list, starts with "* " or "- ".
+        my $bullet = $1;
+        my $item = '';
+        my @items = split /\n/, $p;
+        foreach (@items) {
+            if (s/\A([\*\-] )//) {
+                $retval .= wordwrap_with_bullet_indent($bullet, $item);
+                $item = '';
+            }
+            s/\A\s*//;
+            $item .= "$_\n";   # accumulate lines until we hit the end or another bullet.
+        }
+        if ($item ne '') {
+            $retval .= wordwrap_with_bullet_indent($bullet, $item);
+        }
+    } elsif ($p =~ /\A\s*\|.*\|\s*\n/) {  # Markdown table
+        $retval = "$p\n";  # don't wrap it (!!! FIXME: but maybe parse by lines until we run out of table...)
+    } else {
+        $retval = wordwrap_atom($p) . "\n";
+    }
+
+    return $retval;
+}
+
+sub wordwrap_paragraphs {  # don't call this directly.
+    my $str = shift;
+    my $retval = '';
+    my @paragraphs = split /\n\n/, $str;
+    foreach (@paragraphs) {
+        next if $_ eq '';
+        $retval .= wordwrap_one_paragraph($_);
+        $retval .= "\n";
+    }
+    return $retval;
+}
+
+my $wordwrap_default_columns = 76;
+sub wordwrap {
+    my $str = shift;
+    my $columns = shift;
+
+    $columns = $wordwrap_default_columns if not defined $columns;
+    $columns += $wordwrap_default_columns if $columns < 0;
+    $Text::Wrap::columns = $columns;
+
+    my $retval = '';
+
+    #print("\n\nWORDWRAP:\n\n$str\n\n\n");
+
+    $str =~ s/\A\n+//ms;
+
+    while ($str =~ s/(.*?)(\`\`\`.*?\`\`\`|\<syntaxhighlight.*?\<\/syntaxhighlight\>)//ms) {
+        #print("\n\nWORDWRAP BLOCK:\n\n$1\n\n ===\n\n$2\n\n\n");
+        $retval .= wordwrap_paragraphs($1); # wrap it.
+        $retval .= "$2\n\n";  # don't wrap it.
+    }
+
+    $retval .= wordwrap_paragraphs($str);  # wrap what's left.
+    $retval =~ s/\n+\Z//ms;
+
+    #print("\n\nWORDWRAP DONE:\n\n$retval\n\n\n");
+    return $retval;
+}
+
+# This assumes you're moving from Markdown (in the Doxygen data) to Wiki, which
+#  is why the 'md' section is so sparse.
+sub wikify_chunk {
+    my $wikitype = shift;
+    my $str = shift;
+    my $codelang = shift;
+    my $code = shift;
+
+    #print("\n\nWIKIFY CHUNK:\n\n$str\n\n\n");
+
+    if ($wikitype eq 'mediawiki') {
+        # convert `code` things first, so they aren't mistaken for other markdown items.
+        my $codedstr = '';
+        while ($str =~ s/\A(.*?)\`(.*?)\`//ms) {
+            my $codeblock = $2;
+            $codedstr .= wikify_chunk($wikitype, $1, undef, undef);
+            if (defined $apiprefixregex) {
+                # Convert obvious API things to wikilinks, even inside `code` blocks.
+                $codeblock =~ s/(\A|[^\/a-zA-Z0-9_])($apiprefixregex[a-zA-Z0-9_]+)/$1\[\[$2\]\]/gms;
+            }
+            $codedstr .= "<code>$codeblock</code>";
+        }
+
+        # Convert obvious API things to wikilinks.
+        if (defined $apiprefixregex) {
+            $str =~ s/(\A|[^\/a-zA-Z0-9_])($apiprefixregex[a-zA-Z0-9_]+)/$1\[\[$2\]\]/gms;
+        }
+
+        # Make some Markdown things into MediaWiki...
+
+        # links
+        $str =~ s/\[(.*?)\]\((https?\:\/\/.*?)\)/\[$2 $1\]/g;
+
+        # bold+italic
+        $str =~ s/\*\*\*(.*?)\*\*\*/'''''$1'''''/gms;
+
+        # bold
+        $str =~ s/\*\*(.*?)\*\*/'''$1'''/gms;
+
+        # italic
+        $str =~ s/\*(.*?)\*/''$1''/gms;
+
+        # bullets
+        $str =~ s/^\- /* /gm;
+
+        $str = $codedstr . $str;
+
+        if (defined $code) {
+            $str .= "<syntaxhighlight lang='$codelang'>$code<\/syntaxhighlight>";
+        }
+    } elsif ($wikitype eq 'md') {
+        # convert `code` things first, so they aren't mistaken for other markdown items.
+        my $codedstr = '';
+        while ($str =~ s/\A(.*?)(\`.*?\`)//ms) {
+            my $codeblock = $2;
+            $codedstr .= wikify_chunk($wikitype, $1, undef, undef);
+            if (defined $apiprefixregex) {
+                # Convert obvious API things to wikilinks, even inside `code` blocks,
+                # BUT ONLY IF the entire code block is the API thing,
+                # So something like "just call `SDL_Whatever`" will become
+                # "just call [`SDL_Whatever`](SDL_Whatever)", but
+                # "just call `SDL_Whatever(7)`" will not. It's just the safest
+                # way to do this without resorting to wrapping things in html <code> tags.
+                $codeblock =~ s/\A\`($apiprefixregex[a-zA-Z0-9_]+)\`\Z/[`$1`]($1)/gms;
+            }
+            $codedstr .= $codeblock;
+        }
+
+        # Convert obvious API things to wikilinks.
+        if (defined $apiprefixregex) {
+            $str =~ s/(\A|[^\/a-zA-Z0-9_\[])($apiprefixregex[a-zA-Z0-9_]+)/$1\[$2\]\($2\)/gms;
+        }
+
+        $str = $codedstr . $str;
+
+        if (defined $code) {
+            $str .= "```$codelang\n$code\n```\n";
+        }
+    }
+
+    #print("\n\nWIKIFY CHUNK DONE:\n\n$str\n\n\n");
+
+    return $str;
+}
+
+sub wikify {
+    my $wikitype = shift;
+    my $str = shift;
+    my $retval = '';
+
+    #print("WIKIFY WHOLE:\n\n$str\n\n\n");
+
+    while ($str =~ s/\A(.*?)\`\`\`(.*?)\n(.*?)\n\`\`\`(\n|\Z)//ms) {
+        $retval .= wikify_chunk($wikitype, $1, $2, $3);
+    }
+    $retval .= wikify_chunk($wikitype, $str, undef, undef);
+
+    #print("WIKIFY WHOLE DONE:\n\n$retval\n\n\n");
+
+    return $retval;
+}
+
+
+my $dewikify_mode = 'md';
+my $dewikify_manpage_code_indent = 1;
+
+sub dewikify_chunk {
+    my $wikitype = shift;
+    my $str = shift;
+    my $codelang = shift;
+    my $code = shift;
+
+    #print("\n\nDEWIKIFY CHUNK:\n\n$str\n\n\n");
+
+    if ($dewikify_mode eq 'md') {
+        if ($wikitype eq 'mediawiki') {
+            # Doxygen supports Markdown (and it just simply looks better than MediaWiki
+            # when looking at the raw headers), so do some conversions here as necessary.
+
+            # Dump obvious wikilinks.
+            if (defined $apiprefixregex) {
+                $str =~ s/\[\[($apiprefixregex[a-zA-Z0-9_]+)\]\]/$1/gms;
+            }
+
+            # links
+            $str =~ s/\[(https?\:\/\/.*?)\s+(.*?)\]/\[$2\]\($1\)/g;
+
+            # <code></code> is also popular.  :/
+            $str =~ s/\<code>(.*?)<\/code>/`$1`/gms;
+
+            # bold+italic
+            $str =~ s/'''''(.*?)'''''/***$1***/gms;
+
+            # bold
+            $str =~ s/'''(.*?)'''/**$1**/gms;
+
+            # italic
+            $str =~ s/''(.*?)''/*$1*/gms;
+
+            # bullets
+            $str =~ s/^\* /- /gm;
+        } elsif ($wikitype eq 'md') {
+            # Dump obvious wikilinks. The rest can just passthrough.
+            if (defined $apiprefixregex) {
+                $str =~ s/\[(\`?$apiprefixregex[a-zA-Z0-9_]+\`?)\]\($apiprefixregex[a-zA-Z0-9_]+\)/$1/gms;
+            }
+        }
+
+        if (defined $code) {
+            $str .= "\n```$codelang\n$code\n```\n";
+        }
+    } elsif ($dewikify_mode eq 'manpage') {
+        # make sure these can't become part of roff syntax.
+        $str =~ s/\\/\\(rs/gms;
+        $str =~ s/\./\\[char46]/gms;
+        $str =~ s/"/\\(dq/gms;
+        $str =~ s/'/\\(aq/gms;
+
+        if ($wikitype eq 'mediawiki') {
+            # Dump obvious wikilinks.
+            if (defined $apiprefixregex) {
+                $str =~ s/\s*\[\[($apiprefixregex[a-zA-Z0-9_]+)\]\]\s*/\n.BR $1\n/gms;
+            }
+
+            # links
+            $str =~ s/\[(https?\:\/\/.*?)\s+(.*?)\]/\n.URL "$1" "$2"\n/g;
+
+            # <code></code> is also popular.  :/
+            $str =~ s/\s*\<code>(.*?)<\/code>\s*/\n.BR $1\n/gms;
+
+            # bold+italic (this looks bad, just make it bold).
+            $str =~ s/\s*'''''(.*?)'''''\s*/\n.B $1\n/gms;
+
+            # bold
+            $str =~ s/\s*'''(.*?)'''\s*/\n.B $1\n/gms;
+
+            # italic
+            $str =~ s/\s*''(.*?)''\s*/\n.I $1\n/gms;
+
+            # bullets
+            $str =~ s/^\* /\n\\\(bu /gm;
+        } elsif ($wikitype eq 'md') {
+            # bullets
+            $str =~ s/^\- /\n\\(bu /gm;
+            # merge paragraphs
+            $str =~ s/^[ \t]+//gm;
+            $str =~ s/([^\-\n])\n([^\-\n])/$1 $2/g;
+            $str =~ s/\n\n/\n.PP\n/g;
+
+            # Dump obvious wikilinks.
+            if (defined $apiprefixregex) {
+                my $apr = $apiprefixregex;
+                if(!($apr =~ /\A\(.*\)\Z/s)) {
+                    # we're relying on the apiprefixregex having a capturing group.
+                    $apr = "(" . $apr . ")";
+                }
+                $str =~ s/(\S*?)\[\`?($apr[a-zA-Z0-9_]+)\`?\]\($apr[a-zA-Z0-9_]+\)(\S*)\s*/\n.BR "" "$1" "$2" "$5"\n/gm;
+                # handle cases like "[x](x), [y](y), [z](z)" being separated.
+                while($str =~ s/(\.BR[^\n]*)\n\n\.BR/$1\n.BR/gm) {}
+            }
+
+            # links
+            $str =~ s/\[(.*?)]\((https?\:\/\/.*?)\)/\n.URL "$2" "$1"\n/g;
+
+            # <code></code> is also popular.  :/
+            $str =~ s/\s*(\S*?)\`([^\n]*?)\`(\S*)\s*/\n.BR "" "$1" "$2" "$3"\n/gms;
+
+            # bold+italic (this looks bad, just make it bold).
+            $str =~ s/\s*(\S*?)\*\*\*([^\n]*?)\*\*\*(\S*)\s*/\n.BR "" "$1" "$2" "$3"\n/gms;
+
+            # bold
+            $str =~ s/\s*(\S*?)\*\*([^\n]*?)\*\*(\S*)\s*/\n.BR "" "$1" "$2" "$3"\n/gms;
+
+            # italic
+            $str =~ s/\s*(\S*?)\*([^\n]*?)\*(\S*)\s*/\n.IR "" "$1" "$2" "$3"\n/gms;
+        }
+
+        # cleanup unnecessary quotes
+        $str =~ s/(\.[IB]R?)(.*?) ""\n/$1$2\n/gm;
+        $str =~ s/(\.[IB]R?) "" ""(.*?)\n/$1$2\n/gm;
+        $str =~ s/"(\S+)"/$1/gm;
+        # cleanup unnecessary whitespace
+        $str =~ s/ +\n/\n/gm;
+
+        if (defined $code) {
+            $code =~ s/\A\n+//gms;
+            $code =~ s/\n+\Z//gms;
+            $code =~ s/\\/\\(rs/gms;
+            if ($dewikify_manpage_code_indent) {
+                $str .= "\n.IP\n"
+            } else {
+                $str .= "\n.PP\n"
+            }
+            $str .= ".EX\n$code\n.EE\n.PP\n";
+        }
+    } elsif ($dewikify_mode eq 'LaTeX') {
+        if ($wikitype eq 'mediawiki') {
+            # Dump obvious wikilinks.
+            if (defined $apiprefixregex) {
+                $str =~ s/\s*\[\[($apiprefixregex[a-zA-Z0-9_]+)\]\]/$1/gms;
+            }
+
+            # links
+            $str =~ s/\[(https?\:\/\/.*?)\s+(.*?)\]/\\href{$1}{$2}/g;
+
+            # <code></code> is also popular.  :/
+            $str =~ s/\s*\<code>(.*?)<\/code>/ \\texttt{$1}/gms;
+
+            # bold+italic
+            $str =~ s/\s*'''''(.*?)'''''/ \\textbf{\\textit{$1}}/gms;
+
+            # bold
+            $str =~ s/\s*'''(.*?)'''/ \\textbf{$1}/gms;
+
+            # italic
+            $str =~ s/\s*''(.*?)''/ \\textit{$1}/gms;
+
+            # bullets
+            $str =~ s/^\*\s+/  \\item /gm;
+        } elsif ($wikitype eq 'md') {
+            # Dump obvious wikilinks.
+            if (defined $apiprefixregex) {
+                $str =~ s/\[(\`?$apiprefixregex[a-zA-Z0-9_]+\`?)\]\($apiprefixregex[a-zA-Z0-9_]+\)/$1/gms;
+            }
+
+            # links
+            $str =~ s/\[(.*?)]\((https?\:\/\/.*?)\)/\\href{$2}{$1}/g;
+
+            # <code></code> is also popular.  :/
+            $str =~ s/\s*\`(.*?)\`/ \\texttt{$1}/gms;
+
+            # bold+italic
+            $str =~ s/\s*\*\*\*(.*?)\*\*\*/ \\textbf{\\textit{$1}}/gms;
+
+            # bold
+            $str =~ s/\s*\*\*(.*?)\*\*/ \\textbf{$1}/gms;
+
+            # italic
+            $str =~ s/\s*\*(.*?)\*/ \\textit{$1}/gms;
+
+            # bullets
+            $str =~ s/^\-\s+/  \\item /gm;
+        }
+
+        # Wrap bullet lists in itemize blocks...
+        $str =~ s/^(\s*\\item .*?)(\n\n|\Z)/\n\\begin{itemize}\n$1$2\n\\end{itemize}\n\n/gms;
+
+        $str = escLaTeX($str);
+
+        if (defined $code) {
+            $code =~ s/\A\n+//gms;
+            $code =~ s/\n+\Z//gms;
+
+            if (($codelang eq '') || ($codelang eq 'output')) {
+                $str .= "\\begin{verbatim}\n$code\n\\end{verbatim}\n";
+            } else {
+                if ($codelang eq 'c') {
+                    $codelang = 'C';
+                } elsif ($codelang eq 'c++') {
+                    $codelang = 'C++';
+                } else {
+                    die("Unexpected codelang '$codelang'");
+                }
+                $str .= "\n\\lstset{language=$codelang}\n";
+                $str .= "\\begin{lstlisting}\n$code\n\\end{lstlisting}\n";
+            }
+        }
+    } else {
+        die("Unexpected dewikify_mode");
+    }
+
+    #print("\n\nDEWIKIFY CHUNK DONE:\n\n$str\n\n\n");
+
+    return $str;
+}
+
+sub dewikify {
+    my $wikitype = shift;
+    my $str = shift;
+    return '' if not defined $str;
+
+    #print("DEWIKIFY WHOLE:\n\n$str\n\n\n");
+
+    $str =~ s/\A[\s\n]*\= .*? \=\s*?\n+//ms;
+    $str =~ s/\A[\s\n]*\=\= .*? \=\=\s*?\n+//ms;
+
+    my $retval = '';
+    if ($wikitype eq 'mediawiki') {
+        while ($str =~ s/\A(.*?)<syntaxhighlight lang='?(.*?)'?>(.*?)<\/syntaxhighlight\>//ms) {
+            $retval .= dewikify_chunk($wikitype, $1, $2, $3);
+        }
+    } elsif ($wikitype eq 'md') {
+        while ($str =~ s/\A(.*?)\n?```(.*?)\n(.*?)\n```\n//ms) {
+            $retval .= dewikify_chunk($wikitype, $1, $2, $3);
+        }
+    }
+    $retval .= dewikify_chunk($wikitype, $str, undef, undef);
+
+    #print("DEWIKIFY WHOLE DONE:\n\n$retval\n\n\n");
+
+    return $retval;
+}
+
+sub filecopy {
+    my $src = shift;
+    my $dst = shift;
+    my $endline = shift;
+    $endline = "\n" if not defined $endline;
+
+    open(COPYIN, '<', $src) or die("Failed to open '$src' for reading: $!\n");
+    open(COPYOUT, '>', $dst) or die("Failed to open '$dst' for writing: $!\n");
+    while (<COPYIN>) {
+        chomp;
+        s/[ \t\r\n]*\Z//;
+        print COPYOUT "$_$endline";
+    }
+    close(COPYOUT);
+    close(COPYIN);
+}
+
+sub usage {
+    die("USAGE: $0 <source code git clone path> <wiki git clone path> [--copy-to-headers|--copy-to-wiki|--copy-to-manpages] [--warn-about-missing] [--manpath=<man path>]\n\n");
+}
+
+usage() if not defined $srcpath;
+usage() if not defined $wikipath;
+#usage() if $copy_direction == 0;
+
+if (not defined $manpath) {
+    $manpath = "$srcpath/man";
+}
+
+my @standard_wiki_sections = (
+    'Draft',
+    '[Brief]',
+    'Deprecated',
+    'Header File',
+    'Syntax',
+    'Function Parameters',
+    'Macro Parameters',
+    'Fields',
+    'Values',
+    'Return Value',
+    'Remarks',
+    'Thread Safety',
+    'Version',
+    'Code Examples',
+    'See Also'
+);
+
+# Sections that only ever exist in the wiki and shouldn't be deleted when
+#  not found in the headers.
+my %only_wiki_sections = (  # The ones don't mean anything, I just need to check for key existence.
+    'Draft', 1,
+    'Code Examples', 1,
+    'Header File', 1
+);
+
+
+my %headers = ();       # $headers{"SDL_audio.h"} -> reference to an array of all lines of text in SDL_audio.h.
+my %headersyms = ();   # $headersyms{"SDL_OpenAudio"} -> string of header documentation for SDL_OpenAudio, with comment '*' bits stripped from the start. Newlines embedded!
+my %headerdecls = ();
+my %headersymslocation = ();   # $headersymslocation{"SDL_OpenAudio"} -> name of header holding SDL_OpenAudio define ("SDL_audio.h" in this case).
+my %headersymschunk = ();   # $headersymschunk{"SDL_OpenAudio"} -> offset in array in %headers that should be replaced for this symbol.
+my %headersymshasdoxygen = ();   # $headersymshasdoxygen{"SDL_OpenAudio"} -> 1 if there was no existing doxygen for this function.
+my %headersymstype = ();   # $headersymstype{"SDL_OpenAudio"} -> 1 (function), 2 (macro), 3 (struct), 4 (enum), 5 (other typedef)
+my %headersymscategory = ();   # $headersymscategory{"SDL_OpenAudio"} -> 'Audio' ... this is set with a `/* WIKI CATEGEORY: Audio */` comment in the headers that sets it on all symbols until a new comment changes it. So usually, once at the top of the header file.
+my %headercategorydocs = ();   # $headercategorydocs{"Audio"} -> (fake) symbol for this category's documentation. Undefined if not documented.
+my %headersymsparaminfo = (); # $headersymsparaminfo{"SDL_OpenAudio"} -> reference to array of parameters, pushed by name, then C type string, repeating. Undef'd if void params, or not a function.
+my %headersymsrettype = (); # $headersymsrettype{"SDL_OpenAudio"} -> string of C datatype of return value. Undef'd if not a function.
+my %wikitypes = ();  # contains string of wiki page extension, like $wikitypes{"SDL_OpenAudio"} == 'mediawiki'
+my %wikisyms = ();  # contains references to hash of strings, each string being the full contents of a section of a wiki page, like $wikisyms{"SDL_OpenAudio"}{"Remarks"}.
+my %wikisectionorder = ();   # contains references to array, each array item being a key to a wikipage section in the correct order, like $wikisectionorder{"SDL_OpenAudio"}[2] == 'Remarks'
+my %quickreffuncorder = ();   # contains references to array, each array item being a key to a category with functions in the order they appear in the headers, like $quickreffuncorder{"Audio"}[0] == 'SDL_GetNumAudioDrivers'
+
+my %referenceonly = ();  # $referenceonly{"Y"} -> symbol name that this symbol is bound to. This makes wiki pages that say "See X" where "X" is a typedef and "Y" is a define attached to it. These pages are generated in the wiki only and do not bridge to the headers or manpages.
+
+my @coverage_gap = ();  # array of strings that weren't part of documentation, or blank, or basic preprocessor logic. Lets you see what this script is missing!
+
+sub add_coverage_gap {
+    if ($copy_direction == -3) {  # --report-coverage-gaps
+        my $text = shift;
+        my $dent = shift;
+        my $lineno = shift;
+        return if $text =~ /\A\s*\Z/;  # skip blank lines
+        return if $text =~ /\A\s*\#\s*(if|el|endif|include)/; # skip preprocessor floof.
+        push @coverage_gap, "$dent:$lineno: $text";
+    }
+}
+
+sub print_undocumented_section {
+    my $fh = shift;
+    my $typestr = shift;
+    my $typeval = shift;
+
+    print $fh "## $typestr defined in the headers, but not in the wiki\n\n";
+    my $header_only_sym = 0;
+    foreach (sort keys %headersyms) {
+        my $sym = $_;
+        if ((not defined $wikisyms{$sym}) && ($headersymstype{$sym} == $typeval)) {
+            print $fh "- [$sym]($sym)\n";
+            $header_only_sym = 1;
+        }
+    }
+    if (!$header_only_sym) {
+        print $fh "(none)\n";
+    }
+    print $fh "\n";
+
+    if (0) {  # !!! FIXME: this lists things that _shouldn't_ be in the headers, like MigrationGuide, etc, but also we don't know if they're functions, macros, etc at this point (can we parse that from the wiki page, though?)
+    print $fh "## $typestr defined in the wiki, but not in the headers\n\n";
+
+    my $wiki_only_sym = 0;
+    foreach (sort keys %wikisyms) {
+        my $sym = $_;
+        if ((not defined $headersyms{$sym}) && ($headersymstype{$sym} == $typeval)) {
+            print $fh "- [$sym]($sym)\n";
+            $wiki_only_sym = 1;
+        }
+    }
+    if (!$wiki_only_sym) {
+        print $fh "(none)\n";
+    }
+    print $fh "\n";
+    }
+}
+
+# !!! FIXME: generalize this for other libraries to use.
+sub strip_fn_declaration_metadata {
+    my $decl = shift;
+    $decl =~ s/SDL_(PRINTF|SCANF)_FORMAT_STRING\s*//;  # don't want this metadata as part of the documentation.
+    $decl =~ s/SDL_ALLOC_SIZE2?\(.*?\)\s*//;  # don't want this metadata as part of the documentation.
+    $decl =~ s/SDL_MALLOC\s*//;  # don't want this metadata as part of the documentation.
+    $decl =~ s/SDL_(IN|OUT|INOUT)_.*?CAP\s*\(.*?\)\s*//g;  # don't want this metadata as part of the documentation.
+    $decl =~ s/\)(\s*SDL_[a-zA-Z_]+(\(.*?\)|))*;/);/; # don't want this metadata as part of the documentation.
+    return $decl;
+}
+
+sub sanitize_c_typename {
+    my $str = shift;
+    $str =~ s/\A\s+//;
+    $str =~ s/\s+\Z//;
+    $str =~ s/const\s*(\*+)/const $1/g;  # one space between `const` and pointer stars: `char const* const *` becomes `char const * const *`.
+    $str =~ s/\*\s+\*/**/g;  # drop spaces between pointers: `void * *` becomes `void **`.
+    $str =~ s/\s*(\*+)\Z/ $1/;  # one space between pointer stars and what it points to: `void**` becomes `void **`.
+    return $str;
+}
+
+my %big_ascii = (
+    'A' => [ "\x{20}\x{2588}\x{2588}\x{2588}\x{2588}\x{2588}\x{2557}\x{20}", "\x{2588}\x{2588}\x{2554}\x{2550}\x{2550}\x{2588}\x{2588}\x{2557}", "\x{2588}\x{2588}\x{2588}\x{2588}\x{2588}\x{2588}\x{2588}\x{2551}", "\x{2588}\x{2588}\x{2554}\x{2550}\x{2550}\x{2588}\x{2588}\x{2551}", "\x{2588}\x{2588}\x{2551}\x{20}\x{20}\x{2588}\x{2588}\x{2551}", "\x{255A}\x{2550}\x{255D}\x{20}\x{20}\x{255A}\x{2550}\x{255D}" ],
+    'B' => [ "\x{2588}\x{2588}\x{2588}\x{2588}\x{2588}\x{2588}\x{2557}\x{20}", "\x{2588}\x{2588}\x{2554}\x{2550}\x{2550}\x{2588}\x{2588}\x{2557}", "\x{2588}\x{2588}\x{2588}\x{2588}\x{2588}\x{2588}\x{2554}\x{255D}", "\x{2588}\x{2588}\x{2554}\x{2550}\x{2550}\x{2588}\x{2588}\x{2557}", "\x{2588}\x{2588}\x{2588}\x{2588}\x{2588}\x{2588}\x{2554}\x{255D}", "\x{255A}\x{2550}\x{2550}\x{2550}\x{2550}\x{2550}\x{255D}\x{20}" ],
+    'C' => [ "\x{20}\x{2588}\x{2588}\x{2588}\x{2588}\x{2588}\x{2588}\x{2557}", "\x{2588}\x{2588}\x{2554}\x{2550}\x{2550}\x{2550}\x{2550}\x{255D}", "\x{2588}\x{2588}\x{2551}\x{20}\x{20}\x{20}\x{20}\x{20}", "\x{2588}\x{2588}\x{2551}\x{20}\x{20}\x{20}\x{20}\x{20}", "\x{255A}\x{2588}\x{2588}\x{2588}\x{2588}\x{2588}\x{2588}\x{2557}", "\x{20}\x{255A}\x{2550}\x{2550}\x{2550}\x{2550}\x{2550}\x{255D}" ],
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+    '2' => [ "\x{2588}\x{2588}\x{2588}\x{2588}\x{2588}\x{2588}\x{2557}\x{20}", "\x{255A}\x{2550}\x{2550}\x{2550}\x{2550}\x{2588}\x{2588}\x{2557}", "\x{20}\x{2588}\x{2588}\x{2588}\x{2588}\x{2588}\x{2554}\x{255D}", "\x{2588}\x{2588}\x{2554}\x{2550}\x{2550}\x{2550}\x{255D}\x{20}", "\x{2588}\x{2588}\x{2588}\x{2588}\x{2588}\x{2588}\x{2588}\x{2557}", "\x{255A}\x{2550}\x{2550}\x{2550}\x{2550}\x{2550}\x{2550}\x{255D}" ],
+    '3' => [ "\x{2588}\x{2588}\x{2588}\x{2588}\x{2588}\x{2588}\x{2557}\x{20}", "\x{255A}\x{2550}\x{2550}\x{2550}\x{2550}\x{2588}\x{2588}\x{2557}", "\x{20}\x{2588}\x{2588}\x{2588}\x{2588}\x{2588}\x{2554}\x{255D}", "\x{20}\x{255A}\x{2550}\x{2550}\x{2550}\x{2588}\x{2588}\x{2557}", "\x{2588}\x{2588}\x{2588}\x{2588}\x{2588}\x{2588}\x{2554}\x{255D}", "\x{255A}\x{2550}\x{2550}\x{2550}\x{2550}\x{2550}\x{255D}\x{20}" ],
+    '4' => [ "\x{2588}\x{2588}\x{2557}\x{20}\x{20}\x{2588}\x{2588}\x{2557}", "\x{2588}\x{2588}\x{2551}\x{20}\x{20}\x{2588}\x{2588}\x{2551}", "\x{2588}\x{2588}\x{2588}\x{2588}\x{2588}\x{2588}\x{2588}\x{2551}", "\x{255A}\x{2550}\x{2550}\x{2550}\x{2550}\x{2588}\x{2588}\x{2551}", "\x{20}\x{20}\x{20}\x{20}\x{20}\x{2588}\x{2588}\x{2551}", "\x{20}\x{20}\x{20}\x{20}\x{20}\x{255A}\x{2550}\x{255D}" ],
+    '5' => [ "\x{2588}\x{2588}\x{2588}\x{2588}\x{2588}\x{2588}\x{2588}\x{2557}", "\x{2588}\x{2588}\x{2554}\x{2550}\x{2550}\x{2550}\x{2550}\x{255D}", "\x{2588}\x{2588}\x{2588}\x{2588}\x{2588}\x{2588}\x{2588}\x{2557}", "\x{255A}\x{2550}\x{2550}\x{2550}\x{2550}\x{2588}\x{2588}\x{2551}", "\x{2588}\x{2588}\x{2588}\x{2588}\x{2588}\x{2588}\x{2588}\x{2551}", "\x{255A}\x{2550}\x{2550}\x{2550}\x{2550}\x{2550}\x{2550}\x{255D}" ],
+    '6' => [ "\x{20}\x{2588}\x{2588}\x{2588}\x{2588}\x{2588}\x{2588}\x{2557}\x{20}", "\x{2588}\x{2588}\x{2554}\x{2550}\x{2550}\x{2550}\x{2550}\x{255D}\x{20}", "\x{2588}\x{2588}\x{2588}\x{2588}\x{2588}\x{2588}\x{2588}\x{2557}\x{20}", "\x{2588}\x{2588}\x{2554}\x{2550}\x{2550}\x{2550}\x{2588}\x{2588}\x{2557}", "\x{255A}\x{2588}\x{2588}\x{2588}\x{2588}\x{2588}\x{2588}\x{2554}\x{255D}", "\x{20}\x{255A}\x{2550}\x{2550}\x{2550}\x{2550}\x{2550}\x{255D}\x{20}" ],
+    '7' => [ "\x{2588}\x{2588}\x{2588}\x{2588}\x{2588}\x{2588}\x{2588}\x{2557}", "\x{255A}\x{2550}\x{2550}\x{2550}\x{2550}\x{2588}\x{2588}\x{2551}", "\x{20}\x{20}\x{20}\x{20}\x{2588}\x{2588}\x{2554}\x{255D}", "\x{20}\x{20}\x{20}\x{2588}\x{2588}\x{2554}\x{255D}\x{20}", "\x{20}\x{20}\x{20}\x{2588}\x{2588}\x{2551}\x{20}\x{20}", "\x{20}\x{20}\x{20}\x{255A}\x{2550}\x{255D}\x{20}\x{20}" ],
+    '8' => [ "\x{20}\x{2588}\x{2588}\x{2588}\x{2588}\x{2588}\x{2557}\x{20}", "\x{2588}\x{2588}\x{2554}\x{2550}\x{2550}\x{2588}\x{2588}\x{2557}", "\x{255A}\x{2588}\x{2588}\x{2588}\x{2588}\x{2588}\x{2554}\x{255D}", "\x{2588}\x{2588}\x{2554}\x{2550}\x{2550}\x{2588}\x{2588}\x{2557}", "\x{255A}\x{2588}\x{2588}\x{2588}\x{2588}\x{2588}\x{2554}\x{255D}", "\x{20}\x{255A}\x{2550}\x{2550}\x{2550}\x{2550}\x{255D}\x{20}" ],
+    '9' => [ "\x{20}\x{2588}\x{2588}\x{2588}\x{2588}\x{2588}\x{2557}\x{20}", "\x{2588}\x{2588}\x{2554}\x{2550}\x{2550}\x{2588}\x{2588}\x{2557}", "\x{255A}\x{2588}\x{2588}\x{2588}\x{2588}\x{2588}\x{2588}\x{2551}", "\x{20}\x{255A}\x{2550}\x{2550}\x{2550}\x{2588}\x{2588}\x{2551}", "\x{20}\x{2588}\x{2588}\x{2588}\x{2588}\x{2588}\x{2554}\x{255D}", "\x{20}\x{255A}\x{2550}\x{2550}\x{2550}\x{2550}\x{255D}\x{20}" ],
+);
+
+sub print_big_ascii_string {
+    my $fh = shift;
+    my $str = shift;
+    my $comment = shift;
+    my $lowascii = shift;
+    $comment = '' if not defined $comment;
+    $lowascii = 0 if not defined $lowascii;
+
+    my @chars = split //, $str;
+    my $charcount = scalar(@chars);
+
+    binmode($fh, ":utf8");
+
+    my $maxrows = $lowascii ? 5 : 6;
+
+    for(my $rownum = 0; $rownum < $maxrows; $rownum++){
+        print $fh $comment;
+        my $charidx = 0;
+        foreach my $ch (@chars) {
+            my $rowsref = $big_ascii{uc($ch)};
+            die("Don't have a big ascii entry for '$ch'!\n") if not defined $rowsref;
+            my $row = @$rowsref[$rownum];
+
+            my $outstr = '';
+            if ($lowascii) {
+                my @x = split //, $row;
+                foreach (@x) {
+                    $outstr .= ($_ eq "\x{2588}") ? 'X' : ' ';
+                }
+            } else {
+                $outstr = $row;
+            }
+
+            $charidx++;
+            if ($charidx == $charcount) {
+                $outstr =~ s/\s*\Z//;  # dump extra spaces at the end of the line.
+            } else {
+                $outstr .= ' ';   # space between glyphs.
+            }
+            print $fh $outstr;
+        }
+        print $fh "\n";
+    }
+}
+
+sub generate_quickref {
+    my $briefsref = shift;
+    my $path = shift;
+    my $lowascii = shift;
+
+    # !!! FIXME: this gitrev and majorver/etc stuff is copy/pasted a few times now.
+    if (!$gitrev) {
+        $gitrev = `cd "$srcpath" ; git rev-list HEAD~..`;
+        chomp($gitrev);
+    }
+
+    # !!! FIXME
+    open(FH, '<', "$srcpath/$versionfname") or die("Can't open '$srcpath/$versionfname': $!\n");
+    my $majorver = 0;
+    my $minorver = 0;
+    my $microver = 0;
+    while (<FH>) {
+        chomp;
+        if (/$versionmajorregex/) {
+            $majorver = int($1);
+        } elsif (/$versionminorregex/) {
+            $minorver = int($1);
+        } elsif (/$versionmicroregex/) {
+            $microver = int($1);
+        }
+    }
+    close(FH);
+    my $fullversion = "$majorver.$minorver.$microver";
+
+    my $tmppath = "$path.tmp";
+    open(my $fh, '>', $tmppath) or die("Can't open '$tmppath': $!\n");
+
+    if (not @quickrefcategoryorder) {
+        @quickrefcategoryorder = sort keys %headercategorydocs;
+    }
+
+    #my ($sec,$min,$hour,$mday,$mon,$year,$wday,$yday,$isdst) = gmtime(time);
+    #my $datestr = sprintf("%04d-%02d-%02d %02d:%02d:%02d GMT", $year+1900, $mon+1, $mday, $hour, $min, $sec);
+
+    print $fh "<!-- DO NOT EDIT THIS PAGE ON THE WIKI. IT WILL BE OVERWRITTEN BY WIKIHEADERS AND CHANGES WILL BE LOST! -->\n\n";
+
+    # Just something to test big_ascii output.
+    #print_big_ascii_string($fh, "ABCDEFGHIJ", '', $lowascii);
+    #print_big_ascii_string($fh, "KLMNOPQRST", '', $lowascii);
+    #print_big_ascii_string($fh, "UVWXYZ0123", '', $lowascii);
+    #print_big_ascii_string($fh, "456789JT3A", '', $lowascii);
+    #print_big_ascii_string($fh, "hello, _a.b/c_!!", '', $lowascii);
+
+    # Dan Bechard's work was on an SDL2 cheatsheet:
+    # https://blog.theprogrammingjunkie.com/post/sdl2-cheatsheet/
+
+    if ($lowascii) {
+        print $fh "# QuickReferenceNoUnicode\n\n";
+        print $fh "If you want to paste this into a text editor that can handle\n";
+        print $fh "fancy Unicode section headers, try using\n";
+        print $fh "[QuickReference](QuickReference) instead.\n\n";
+    } else {
+        print $fh "# QuickReference\n\n";
+        print $fh "If you want to paste this into a text editor that can't handle\n";
+        print $fh "the fancy Unicode section headers, try using\n";
+        print $fh "[QuickReferenceNoUnicode](QuickReferenceNoUnicode) instead.\n\n";
+    }
+
+    print $fh "```c\n";
+    print $fh "// $quickreftitle\n" if defined $quickreftitle;
+    print $fh "//\n";
+    print $fh "// $quickrefurl\n//\n" if defined $quickrefurl;
+    print $fh "// $quickrefdesc\n" if defined $quickrefdesc;
+    #print $fh "// When this document was written: $datestr\n";
+    print $fh "// Based on $projectshortname version $fullversion\n";
+    #print $fh "// git revision $gitrev\n";
+    print $fh "//\n";
+    print $fh "// This can be useful in an IDE with search and syntax highlighting.\n";
+    print $fh "//\n";
+    print $fh "// Original idea for this document came from Dan Bechard (thanks!)\n";
+    print $fh "// ASCII art generated by: https://patorjk.com/software/taag/#p=display&f=ANSI%20Shadow (with modified 'S' for readability)\n\n";
+
+    foreach (@quickrefcategoryorder) {
+        my $cat = $_;
+        my $maxlen = 0;
+        my @csigs = ();
+        my $funcorderref = $quickreffuncorder{$cat};
+        next if not defined $funcorderref;
+
+        foreach (@$funcorderref) {
+            my $sym = $_;
+            my $csig = '';
+
+            if ($headersymstype{$sym} == 1) {  # function
+                $csig = "${headersymsrettype{$sym}} $sym";
+                my $fnsigparams = $headersymsparaminfo{$sym};
+                if (not defined($fnsigparams)) {
+                    $csig .= '(void);';
+                } else {
+                    my $sep = '(';
+                    for (my $i = 0; $i < scalar(@$fnsigparams); $i += 2) {
+                        my $paramname = @$fnsigparams[$i];
+                        my $paramtype = @$fnsigparams[$i+1];
+                        my $spc = ($paramtype =~ /\*\Z/) ? '' : ' ';
+                        $csig .= "$sep$paramtype$spc$paramname";
+                        $sep = ', ';
+                    }
+                    $csig .= ");";
+                }
+            } elsif ($headersymstype{$sym} == 2) {  # macro
+                next if defined $quickrefmacroregex && not $sym =~ /$quickrefmacroregex/;
+
+                $csig = (split /\n/, $headerdecls{$sym})[0];  # get the first line from a multiline string.
+                if (not $csig =~ s/\A(\#define [a-zA-Z0-9_]*\(.*?\))(\s+.*)?\Z/$1/) {
+                    $csig =~ s/\A(\#define [a-zA-Z0-9_]*)(\s+.*)?\Z/$1/;
+                }
+                chomp($csig);
+            }
+
+            my $len = length($csig);
+            $maxlen = $len if $len > $maxlen;
+
+            push @csigs, $sym;
+            push @csigs, $csig;
+        }
+
+        $maxlen += 2;
+
+        next if (not @csigs);
+
+        print $fh "\n";
+        print_big_ascii_string($fh, $cat, '// ', $lowascii);
+        print $fh "\n";
+
+        while (@csigs) {
+            my $sym = shift @csigs;
+            my $csig = shift @csigs;
+            my $brief = $$briefsref{$sym};
+            if (defined $brief) {
+                $brief = "$brief";
+                chomp($brief);
+                my $thiswikitype = defined $wikitypes{$sym} ? $wikitypes{$sym} : 'md';  # default to MarkDown for new stuff.
+                $brief = dewikify($thiswikitype, $brief);
+                my $spaces = ' ' x ($maxlen - length($csig));
+                $brief = "$spaces// $brief";
+            } else {
+                $brief = '';
+            }
+            print $fh "$csig$brief\n";
+        }
+    }
+
+    print $fh "```\n\n";
+
+    close($fh);
+
+#    # Don't overwrite the file if nothing has changed besides the timestamp
+#    #  and git revision.
+#    my $matches = 1;
+#    if ( not -f $path ) {
+#        $matches = 0;  # always write if the file hasn't been created yet.
+#    } else {
+#        open(my $fh_a, '<', $tmppath) or die("Can't open '$tmppath': $!\n");
+#        open(my $fh_b, '<', $path) or die("Can't open '$path': $!\n");
+#        while (1) {
+#            my $a = <$fh_a>;
+#            my $b = <$fh_b>;
+#            $matches = 0, last if ((not defined $a) != (not defined $b));
+#            last if ((not defined $a) || (not defined $b));
+#            if ($a ne $b) {
+#                next if ($a =~ /\A\/\/ When this document was written:/);
+#                next if ($a =~ /\A\/\/ git revision /);
+#                $matches = 0;
+#                last;
+#            }
+#        }
+#
+#        close($fh_a);
+#        close($fh_b);
+#    }
+#
+#    if ($matches) {
+#        unlink($tmppath);  # it's the same file except maybe the date/gitrev. Don't overwrite it.
+#    } else {
+#        rename($tmppath, $path) or die("Can't rename '$tmppath' to '$path': $!\n");
+#    }
+    rename($tmppath, $path) or die("Can't rename '$tmppath' to '$path': $!\n");
+}
+
+
+sub generate_envvar_wiki_page {
+    my $briefsref = shift;
+    my $path = shift;
+
+    return if not $envvarenabled or not defined $envvarsymregex or not defined $envvarsymreplace;
+
+    my $replace = "\"$envvarsymreplace\"";
+    my $tmppath = "$path.tmp";
+    open(my $fh, '>', $tmppath) or die("Can't open '$tmppath': $!\n");
+
+    print $fh "<!-- DO NOT EDIT THIS PAGE ON THE WIKI. IT WILL BE OVERWRITTEN BY WIKIHEADERS AND CHANGES WILL BE LOST! -->\n\n";
+    print $fh "# $envvartitle\n\n";
+
+    if (defined $envvardesc) {
+        my $desc = "$envvardesc";
+        $desc =~ s/\\n/\n/g;  # replace "\n" strings with actual newlines.
+        print $fh "$desc\n\n";
+    }
+
+    print $fh "## Environment Variable List\n\n";
+
+    foreach (sort keys %headersyms) {
+        my $sym = $_;
+        next if $headersymstype{$sym} != 2;  # not a #define? skip it.
+        my $hint = "$_";
+        next if not $hint =~ s/$envvarsymregex/$replace/ee;
+
+        my $brief = $$briefsref{$sym};
+        if (not defined $brief) {
+            $brief = '';
+        } else {
+            $brief = "$brief";
+            chomp($brief);
+            my $thiswikitype = defined $wikitypes{$sym} ? $wikitypes{$sym} : 'md';  # default to MarkDown for new stuff.
+            $brief = ": " . dewikify($thiswikitype, $brief);
+        }
+        print $fh "- [$hint]($sym)$brief\n";
+    }
+
+    print $fh "\n";
+
+    close($fh);
+
+    rename($tmppath, $path) or die("Can't rename '$tmppath' to '$path': $!\n");
+}
+
+
+
+
+my $incpath = "$srcpath";
+$incpath .= "/$incsubdir" if $incsubdir ne '';
+
+my $readmepath = undef;
+if (defined $readmesubdir) {
+    $readmepath = "$srcpath/$readmesubdir";
+}
+
+opendir(DH, $incpath) or die("Can't opendir '$incpath': $!\n");
+while (my $d = readdir(DH)) {
+    my $dent = $d;
+    next if not $dent =~ /$selectheaderregex/;  # just selected headers.
+    open(FH, '<', "$incpath/$dent") or die("Can't open '$incpath/$dent': $!\n");
+
+    # You can optionally set a wiki category with Perl code in .wikiheaders-options that gets eval()'d per-header,
+    # and also if you put `/* WIKI CATEGORY: blah */` on a line by itself, it'll change the category for any symbols
+    # below it in the same file. If no category is set, one won't be added for the symbol (beyond the standard CategoryFunction, etc)
+    my $current_wiki_category = undef;
+    if (defined $headercategoryeval) {
+        $_ = $dent;
+        $current_wiki_category = eval($headercategoryeval);
+        if (($current_wiki_category eq '') || ($current_wiki_category eq '-')) {
+            $current_wiki_category = undef;
+        }
+        #print("CATEGORY FOR '$dent' IS " . (defined($current_wiki_category) ? "'$current_wiki_category'" : '(undef)') . "\n");
+    }
+
+    my @contents = ();
+    my @function_order = ();
+    my $ignoring_lines = 0;
+    my $header_comment = -1;
+    my $saw_category_doxygen = -1;
+    my $lineno = 0;
+
+    while (<FH>) {
+        chomp;
+        $lineno++;
+        my $symtype = 0;  # nothing, yet.
+        my $decl;
+        my @templines;
+        my $str;
+        my $has_doxygen = 1;
+
+        # Since a lot of macros are just preprocessor logic spam and not all macros are worth documenting anyhow, we only pay attention to them when they have a Doxygen comment attached.
+        # Functions and other things are a different story, though!
+
+        if ($header_comment == -1) {
+            $header_comment = /\A\/\*\s*\Z/ ? 1 : 0;
+        } elsif (($header_comment == 1) && (/\A\*\/\s*\Z/)) {
+            $header_comment = 0;
+        }
+
+        if ($ignoring_lines && /\A\s*\#\s*endif\s*\Z/) {
+            $ignoring_lines = 0;
+            push @contents, $_;
+            next;
+        } elsif ($ignoring_lines) {
+            push @contents, $_;
+            next;
+        } elsif (/\A\s*\#\s*ifndef\s+$wikidocsectionsym\s*\Z/) {
+            $ignoring_lines = 1;
+            push @contents, $_;
+            next;
+        } elsif (/\A\s*\/\*\s*WIKI CATEGORY:\s*(.*?)\s*\*\/\s*\Z/) {
+            $current_wiki_category = (($1 eq '') || ($1 eq '-')) ? undef : $1;
+            #print("CATEGORY FOR '$dent' CHANGED TO " . (defined($current_wiki_category) ? "'$current_wiki_category'" : '(undef)') . "\n");
+            push @contents, $_;
+            next;
+        } elsif (/\A\s*extern\s+(?:$deprecatedsym\s+|)$declspecsym/) {  # a function declaration without a doxygen comment?
+            $symtype = 1;   # function declaration
+            @templines = ();
+            $decl = $_;
+            $str = '';
+            $has_doxygen = 0;
+        } elsif (/\A\s*$forceinlinesym/) {  # a (forced-inline) function declaration without a doxygen comment?
+            $symtype = 1;   # function declaration
+            @templines = ();
+            $decl = $_;
+            $str = '';
+            $has_doxygen = 0;
+        } elsif (not /\A\/\*\*\s*\Z/) {  # not doxygen comment start?
+            push @contents, $_;
+            add_coverage_gap($_, $dent, $lineno) if ($header_comment == 0);
+            next;
+        } else {   # Start of a doxygen comment, parse it out.
+            my $is_category_doxygen = 0;
+
+            @templines = ( $_ );
+            while (<FH>) {
+                chomp;
+                $lineno++;
+                push @templines, $_;
+                last if /\A\s*\*\/\Z/;
+                if (s/\A\s*\*\s*\`\`\`/```/) {  # this is a hack, but a lot of other code relies on the whitespace being trimmed, but we can't trim it in code blocks...
+                    $str .= "$_\n";
+                    while (<FH>) {
+                        chomp;
+                        $lineno++;
+                        push @templines, $_;
+                        s/\A\s*\*\s?//;
+                        if (s/\A\s*\`\`\`/```/) {
+                            $str .= "$_\n";
+                            last;
+                        } else {
+                            $str .= "$_\n";
+                        }
+                    }
+                } else {
+                    s/\A\s*\*\s*//;   # Strip off the " * " at the start of the comment line.
+
+                    # To add documentation to Category Pages, the rule is it has to
+                    # be the first Doxygen comment in the header, and it must start with `# CategoryX`
+                    # (otherwise we'll treat it as documentation for whatever's below it). `X` is
+                    # the category name, which doesn't _necessarily_ have to match
+                    # $current_wiki_category, but it probably should.
+                    #
+                    # For compatibility with Doxygen, if there's a `\file` here instead of
+                    # `# CategoryName`, we'll accept it and use the $current_wiki_category if set.
+                    if ($saw_category_doxygen == -1) {
+                        $saw_category_doxygen = defined($current_wiki_category) && /\A\\file\s+/;
+                        if ($saw_category_doxygen) {
+                            $_ = "# Category$current_wiki_category";
+                        } else {
+                            $saw_category_doxygen = /\A\# Category/;
+                        }
+                        $is_category_doxygen = $saw_category_doxygen;
+                    }
+
+                    $str .= "$_\n";
+                }
+            }
+
+            if ($is_category_doxygen) {
+                $str =~ s/\s*\Z//;
+                $decl = '';
+                $symtype = -1;  # not a symbol at all.
+            } else {
+                $decl = <FH>;
+                $lineno++ if defined $decl;
+                $decl = '' if not defined $decl;
+                chomp($decl);
+                if ($decl =~ /\A\s*extern\s+(?:$deprecatedsym\s+|)$declspecsym/) {
+                    $symtype = 1;   # function declaration
+                } elsif ($decl =~ /\A\s*$forceinlinesym/) {
+                    $symtype = 1;   # (forced-inline) function declaration
+                } elsif ($decl =~ /\A\s*\#\s*define\s+/) {
+                    $symtype = 2;   # macro
+                } elsif ($decl =~ /\A\s*(typedef\s+|)(struct|union)\s*([a-zA-Z0-9_]*?)\s*(\n|\{|\Z)/) {
+                    $symtype = 3;   # struct or union
+                } elsif ($decl =~ /\A\s*(typedef\s+|)enum\s*([a-zA-Z0-9_]*?)\s*(\n|\{|\Z)/) {
+                    $symtype = 4;   # enum
+                } elsif ($decl =~ /\A\s*typedef\s+.*\Z/) {
+                    $symtype = 5;   # other typedef
+                } else {
+                    #print "Found doxygen but no function sig:\n$str\n\n";
+                    foreach (@templines) {
+                        push @contents, $_;
+                        add_coverage_gap($_, $dent, $lineno);
+                    }
+                    push @contents, $decl;
+                    add_coverage_gap($decl, $dent, $lineno);
+                    next;
+                }
+            }
+        }
+
+        my @paraminfo = ();
+        my $rettype = undef;
+        my @decllines = ( $decl );
+        my $sym = '';
+
+        if ($symtype == -1) {  # category documentation with no symbol attached.
+            @decllines = ();
+            if ($str =~ /^#\s*Category(.*?)\s*$/m) {
+                $sym = "[category documentation] $1";  # make a fake, unique symbol that's not valid C.
+            } else {
+                die("Unexpected category documentation line '$str' in '$incpath/$dent' ...?");
+            }
+            $headercategorydocs{$current_wiki_category} = $sym;
+        } elsif ($symtype == 1) {  # a function
+            my $is_forced_inline = ($decl =~ /\A\s*$forceinlinesym/);
+
+            if ($is_forced_inline) {
+                if (not $decl =~ /\)\s*(\{.*|)\s*\Z/) {
+                    while (<FH>) {
+                        chomp;
+                        $lineno++;
+                        push @decllines, $_;
+                        s/\A\s+//;
+                        s/\s+\Z//;
+                        $decl .= " $_";
+                        last if /\)\s*(\{.*|)\s*\Z/;
+                    }
+                }
+                $decl =~ s/\s*\)\s*(\{.*|)\s*\Z/);/;
+            } else {
+                if (not $decl =~ /;/) {
+                    while (<FH>) {
+                        chomp;
+                        $lineno++;
+                        push @decllines, $_;
+                        s/\A\s+//;
+                        s/\s+\Z//;
+                        $decl .= " $_";
+                        last if /;/;
+                    }
+                }
+                $decl =~ s/\s+\);\Z/);/;
+                $decl =~ s/\s+;\Z/;/;
+            }
+
+            $decl =~ s/\s+\Z//;
+
+            $decl = strip_fn_declaration_metadata($decl);
+
+            my $paramsstr = undef;
+
+            if (!$is_forced_inline && $decl =~ /\A\s*extern\s+(?:$deprecatedsym\s+|)$declspecsym\w*\s+(const\s+|)(unsigned\s+|)(.*?)([\*\s]+)(\*?)\s*$callconvsym\s+(.*?)\s*\((.*?)\);/) {
+                $sym = $6;
+                $rettype = "$1$2$3$4$5";
+                $paramsstr = $7;
+             } elsif ($is_forced_inline && $decl =~ /\A\s*$forceinlinesym\s+(?:$deprecatedsym\s+|)(const\s+|)(unsigned\s+|)(.*?)([\*\s]+)(.*?)\s*\((.*?)\);/) {
+                $sym = $5;
+                $rettype = "$1$2$3$4";
+                $paramsstr = $6;
+             } else {
+                #print "Found doxygen but no function sig:\n$str\n\n";
+                foreach (@templines) {
+                    push @contents, $_;
+                }
+                foreach (@decllines) {
+                    push @contents, $_;
+                }
+                next;
+            }
+
+            $rettype = sanitize_c_typename($rettype);
+
+            if ($paramsstr =~ /\(/) {
+                die("\n\n$0 FAILURE!\n" .
+                    "There's a '(' in the parameters for function '$sym' '$incpath/$dent'.\n" .
+                    "This usually means there's a parameter that's a function pointer type.\n" .
+                    "This causes problems for wikiheaders.pl and is less readable, too.\n" .
+                    "Please put that function pointer into a typedef,\n" .
+                    "and use the new type in this function's signature instead!\n\n");
+            }
+
+            my @params = split(/,/, $paramsstr);
+            my $dotdotdot = 0;
+            foreach (@params) {
+                my $p = $_;
+                $p =~ s/\A\s+//;
+                $p =~ s/\s+\Z//;
+                if (($p eq 'void') || ($p eq '')) {
+                    die("Void parameter in a function with multiple params?! ('$sym' in '$incpath/$dent')") if (scalar(@params) != 1);
+                } elsif ($p eq '...') {
+                    die("Mutiple '...' params?! ('$sym' in '$incpath/$dent')") if ($dotdotdot);
+                    $dotdotdot = 1;
+                    push @paraminfo, '...';
+                    push @paraminfo, '...';
+                } elsif ($p =~ /\A(.*)\s+([a-zA-Z0-9_\*\[\]]+)\Z/) {
+                    die("Parameter after '...' param?! ('$sym' in '$incpath/$dent')") if ($dotdotdot);
+                    my $t = $1;
+                    my $n = $2;
+                    if ($n =~ s/\A(\*+)//) {
+                        $t .= $1;  # move any `*` that stuck to the name over.
+                    }
+                    if ($n =~ s/\[\]\Z//) {
+                        $t = "$t*";  # move any `[]` that stuck to the name over, as a pointer.
+                    }
+                    $t = sanitize_c_typename($t);
+                    #print("$t\n");
+                    #print("$n\n");
+                    push @paraminfo, $n;
+                    push @paraminfo, $t;
+                } else {
+                    die("Unexpected parameter '$p' in function '$sym' in '$incpath/$dent'!");
+                }
+            }
+
+            if (!$is_forced_inline) {  # don't do with forced-inline because we don't want the implementation inserted in the wiki.
+                my $shrink_length = 0;
+
+                $decl = '';  # rebuild this with the line breaks, since it looks better for syntax highlighting.
+                foreach (@decllines) {
+                    if ($decl eq '') {
+                        my $temp;
+
+                        $decl = $_;
+                        $temp = $decl;
+                        $temp =~ s/\Aextern\s+(?:$deprecatedsym\s+|)$declspecsym\w*\s+(.*?)\s+(\*?)$callconvsym\s+/$1$2 /;
+                        $shrink_length = length($decl) - length($temp);
+                        $decl = $temp;
+                    } else {
+                        my $trimmed = $_;
+                        $trimmed =~ s/\A\s{$shrink_length}//;  # shrink to match the removed "extern SDL_DECLSPEC SDLCALL "
+                        $decl .= $trimmed;
+                    }
+                    $decl .= "\n";
+                }
+            }
+
+            $decl = strip_fn_declaration_metadata($decl);
+
+            # !!! FIXME: code duplication with typedef processing, below.
+            # We assume any `#define`s directly after the function are related to it: probably bitflags for an integer typedef.
+            # We'll also allow some other basic preprocessor lines.
+            # Blank lines are allowed, anything else, even comments, are not.
+            my $blank_lines = 0;
+            my $lastpos = tell(FH);
+            my $lastlineno = $lineno;
+            my $additional_decl = '';
+            my $saw_define = 0;
+            while (<FH>) {
+                chomp;
+
+                $lineno++;
+
+                if (/\A\s*\Z/) {
+                    $blank_lines++;
+                } elsif (/\A\s*\#\s*(define|if|else|elif|endif)(\s+|\Z)/) {
+                    if (/\A\s*\#\s*define\s+([a-zA-Z0-9_]*)/) {
+                        $referenceonly{$1} = $sym;
+                        $saw_define = 1;
+                    } elsif (!$saw_define) {
+                        # if the first non-blank thing isn't a #define, assume we're done.
+                        seek(FH, $lastpos, 0);  # re-read eaten lines again next time.
+                        $lineno = $lastlineno;
+                        last;
+                    }
+
+                    # update strings now that we know everything pending is to be applied to this declaration. Add pending blank lines and the new text.
+
+                    # At Sam's request, don't list property defines with functions. (See #9440)
+                    my $is_property = (defined $apipropertyregex) ? /$apipropertyregex/ : 0;
+                    if (!$is_property) {
+                        if ($blank_lines > 0) {
+                            while ($blank_lines > 0) {
+                                $additional_decl .= "\n";
+                                push @decllines, '';
+                                $blank_lines--;
+                            }
+                        }
+                        $additional_decl .= "\n$_";
+                        push @decllines, $_;
+                        $lastpos = tell(FH);
+                    }
+                } else {
+                    seek(FH, $lastpos, 0);  # re-read eaten lines again next time.
+                    $lineno = $lastlineno;
+                    last;
+                }
+            }
+            $decl .= $additional_decl;
+        } elsif ($symtype == 2) {  # a macro
+            if ($decl =~ /\A\s*\#\s*define\s+(.*?)(\(.*?\)|)(\s+|\Z)/) {
+                $sym = $1;
+            } else {
+                #print "Found doxygen but no macro:\n$str\n\n";
+                foreach (@templines) {
+                    push @contents, $_;
+                }
+                foreach (@decllines) {
+                    push @contents, $_;
+                }
+                next;
+            }
+
+            while ($decl =~ /\\\Z/) {
+                my $l = <FH>;
+                last if not $l;
+                $lineno++;
+                chomp($l);
+                push @decllines, $l;
+                #$l =~ s/\A\s+//;
+                $l =~ s/\s+\Z//;
+                $decl .= "\n$l";
+            }
+        } elsif (($symtype == 3) || ($symtype == 4)) {  # struct or union or enum
+            my $has_definition = 0;
+            if ($decl =~ /\A\s*(typedef\s+|)(struct|union|enum)\s*([a-zA-Z0-9_]*?)\s*(\n|\{|\;|\Z)/) {
+                my $ctype = $2;
+                my $origsym = $3;
+                my $ending = $4;
+                $sym = $origsym;
+                if ($sym =~ s/\A(.*?)(\s+)(.*?)\Z/$1/) {
+                    die("Failed to parse '$origsym' correctly!") if ($sym ne $1);  # Thought this was "typedef struct MySym MySym;" ... it was not.  :(  This is a hack!
+                }
+                if ($sym eq '') {
+                    die("\n\n$0 FAILURE!\n" .
+                        "There's a 'typedef $ctype' in $incpath/$dent without a name at the top.\n" .
+                        "Instead of `typedef $ctype {} x;`, this should be `typedef $ctype x {} x;`.\n" .
+                        "This causes problems for wikiheaders.pl and scripting language bindings.\n" .
+                        "Please fix it!\n\n");
+                }
+                $has_definition = ($ending ne ';');
+            } else {
+                #print "Found doxygen but no datatype:\n$str\n\n";
+                foreach (@templines) {
+                    push @contents, $_;
+                }
+                foreach (@decllines) {
+                    push @contents, $_;
+                }
+                next;
+            }
+
+            # This block attempts to find the whole struct/union/enum definition by counting matching brackets. Kind of yucky.
+            # It also "parses" enums enough to find out the elements of it.
+            if ($has_definition) {
+                my $started = 0;
+                my $brackets = 0;
+                my $pending = $decl;
+                my $skipping_comment = 0;
+
+                $decl = '';
+                while (!$started || ($brackets != 0)) {
+                    foreach my $seg (split(/([{}])/, $pending)) {   # (this will pick up brackets in comments! Be careful!)
+                        $decl .= $seg;
+                        if ($seg eq '{') {
+                            $started = 1;
+                            $brackets++;
+                        } elsif ($seg eq '}') {
+                            die("Something is wrong with header $incpath/$dent while parsing $sym; is a bracket missing?\n") if ($brackets <= 0);
+                            $brackets--;
+                        }
+                    }
+
+                    if ($skipping_comment) {
+                        if ($pending =~ s/\A.*?\*\///) {
+                            $skipping_comment = 0;
+                        }
+                    }
+
+                    if (!$skipping_comment && $started && ($symtype == 4)) {  # Pick out elements of an enum.
+                        my $stripped = "$pending";
+                        $stripped =~ s/\/\*.*?\*\///g;  # dump /* comments */ that exist fully on one line.
+                        if ($stripped =~ /\/\*/) {  # uhoh, a /* comment */ that crosses newlines.
+                            $skipping_comment = 1;
+                        } elsif ($stripped =~ /\A\s*([a-zA-Z0-9_]+)(.*)\Z/) {  #\s*(\=\s*.*?|)\s*,?(.*?)\Z/) {
+                            if ($1 ne 'typedef') {  # make sure we didn't just eat the first line by accident.  :/
+                                #print("ENUM [$1] $incpath/$dent:$lineno\n");
+                                $referenceonly{$1} = $sym;
+                            }
+                        }
+                    }
+
+                    if (!$started || ($brackets != 0)) {
+                        $pending = <FH>;
+                        die("EOF/error reading $incpath/$dent while parsing $sym\n") if not $pending;
+                        $lineno++;
+                        chomp($pending);
+                        push @decllines, $pending;
+                        $decl .= "\n";
+                    }
+                }
+                # this currently assumes the struct/union/enum ends on the line with the final bracket. I'm not writing a C parser here, fix the header!
+            }
+        } elsif ($symtype == 5) {  # other typedef
+            if ($decl =~ /\A\s*typedef\s+(.*)\Z/) {
+                my $tdstr = $1;
+
+                if (not $decl =~ /;/) {
+                    while (<FH>) {
+                        chomp;
+                        $lineno++;
+                        push @decllines, $_;
+                        s/\A\s+//;
+                        s/\s+\Z//;
+                        $decl .= " $_";
+                        last if /;/;
+                    }
+                }
+                $decl =~ s/\s+(\))?;\Z/$1;/;
+
+                $tdstr =~ s/;\s*\Z//;
+
+                #my $datatype;
+                if ($tdstr =~ /\A(.*?)\s*\((.*?)\s*\*\s*(.*?)\)\s*\((.*?)(\))?/) {  # a function pointer type
+                    $sym = $3;
+                    #$datatype = "$1 ($2 *$sym)($4)";
+                } elsif ($tdstr =~ /\A(.*[\s\*]+)(.*?)\s*\Z/) {
+                    $sym = $2;
+                    #$datatype = $1;
+                } else {
+                    die("Failed to parse typedef '$tdstr' in $incpath/$dent!\n");  # I'm hitting a C grammar nail with a regexp hammer here, y'all.
+                }
+
+                $sym =~ s/\A\s+//;
+                $sym =~ s/\s+\Z//;
+                #$datatype =~ s/\A\s+//;
+                #$datatype =~ s/\s+\Z//;
+            } else {
+                #print "Found doxygen but no datatype:\n$str\n\n";
+                foreach (@templines) {
+                    push @contents, $_;
+                }
+                foreach (@decllines) {
+                    push @contents, $_;
+                }
+                next;
+            }
+
+            # We assume any `#define`s directly after the typedef are related to it: probably bitflags for an integer typedef.
+            # We'll also allow some other basic preprocessor lines.
+            # Blank lines are allowed, anything else, even comments, are not.
+            my $blank_lines = 0;
+            my $lastpos = tell(FH);
+            my $lastlineno = $lineno;
+            my $additional_decl = '';
+            my $saw_define = 0;
+            while (<FH>) {
+                chomp;
+
+                $lineno++;
+
+                if (/\A\s*\Z/) {
+                    $blank_lines++;
+                } elsif (/\A\s*\#\s*(define|if|else|elif|endif)(\s+|\Z)/) {
+                    if (/\A\s*\#\s*define\s+([a-zA-Z0-9_]*)/) {
+                        $referenceonly{$1} = $sym;
+                        $saw_define = 1;
+                    } elsif (!$saw_define) {
+                        # if the first non-blank thing isn't a #define, assume we're done.
+                        seek(FH, $lastpos, 0);  # re-read eaten lines again next time.
+                        $lineno = $lastlineno;
+                        last;
+                    }
+                    # update strings now that we know everything pending is to be applied to this declaration. Add pending blank lines and the new text.
+                    if ($blank_lines > 0) {
+                        while ($blank_lines > 0) {
+                            $additional_decl .= "\n";
+                            push @decllines, '';
+                            $blank_lines--;
+                        }
+                    }
+                    $additional_decl .= "\n$_";
+                    push @decllines, $_;
+                    $lastpos = tell(FH);
+                } else {
+                    seek(FH, $lastpos, 0);  # re-read eaten lines again next time.
+                    $lineno = $lastlineno;
+                    last;
+                }
+            }
+            $decl .= $additional_decl;
+        } else {
+            die("Unexpected symtype $symtype");
+        }
+
+        #print("DECL: [$decl]\n");
+
+        #print("$sym:\n$str\n\n");
+
+        # There might be multiple declarations of a function due to #ifdefs,
+        #  and only one of them will have documentation. If we hit an
+        #  undocumented one before, delete the placeholder line we left for
+        #  it so it doesn't accumulate a new blank line on each run.
+        my $skipsym = 0;
+        if (defined $headersymshasdoxygen{$sym}) {
+            if ($headersymshasdoxygen{$sym} == 0) {  # An undocumented declaration already exists, nuke its placeholder line.
+                delete $contents[$headersymschunk{$sym}];  # delete DOES NOT RENUMBER existing elements!
+            } else {  # documented function already existed?
+                $skipsym = 1;  # don't add this copy to the list of functions.
+                if ($has_doxygen) {
+                    print STDERR "WARNING: Symbol '$sym' appears to be documented in multiple locations. Only keeping the first one we saw!\n";
+                }
+                push @contents, join("\n", @decllines) if (scalar(@decllines) > 0);  # just put the existing declation in as-is.
+            }
+        }
+
+        if (!$skipsym) {
+            $headersymscategory{$sym} = $current_wiki_category if defined $current_wiki_category;
+            $headersyms{$sym} = $str;
+            $headerdecls{$sym} = $decl;
+            $headersymslocation{$sym} = $dent;
+            $headersymschunk{$sym} = scalar(@contents);
+            $headersymshasdoxygen{$sym} = $has_doxygen;
+            $headersymstype{$sym} = $symtype;
+            $headersymsparaminfo{$sym} = \@paraminfo if (scalar(@paraminfo) > 0);
+            $headersymsrettype{$sym} = $rettype if (defined($rettype));
+            push @function_order, $sym if ($symtype == 1) || ($symtype == 2);
+            push @contents, join("\n", @templines);
+            push @contents, join("\n", @decllines) if (scalar(@decllines) > 0);
+        }
+
+    }
+    close(FH);
+
+    $headers{$dent} = \@contents;
+    $quickreffuncorder{$current_wiki_category} = \@function_order if defined $current_wiki_category;
+}
+closedir(DH);
+
+
+opendir(DH, $wikipath) or die("Can't opendir '$wikipath': $!\n");
+while (my $d = readdir(DH)) {
+    my $dent = $d;
+    my $type = '';
+    if ($dent =~ /\.(md|mediawiki)\Z/) {
+        $type = $1;
+    } else {
+        next;  # only dealing with wiki pages.
+    }
+
+    my $sym = $dent;
+    $sym =~ s/\..*\Z//;
+
+    # (There are other pages to ignore, but these are known ones to not bother parsing.)
+    # Ignore FrontPage.
+    next if $sym eq 'FrontPage';
+
+    open(FH, '<', "$wikipath/$dent") or die("Can't open '$wikipath/$dent': $!\n");
+
+    if ($sym =~ /\ACategory(.*?)\Z/) {  # Special case for Category pages.
+        # Find the end of the category documentation in the existing file and append everything else to the new file.
+        my $cat = $1;
+        my $docstr = '';
+        my $notdocstr = '';
+        my $docs = 1;
+        while (<FH>) {
+            chomp;
+            if ($docs) {
+                $docs = 0 if /\A\-\-\-\-\Z/;  # Hit a footer? We're done.
+                $docs = 0 if /\A<!\-\-/;  # Hit an HTML comment? We're done.
+            }
+            if ($docs) {
+                $docstr .= "$_\n";
+            } else {
+                $notdocstr .= "$_\n";
+            }
+        }
+        close(FH);
+
+        $docstr =~ s/\s*\Z//;
+
+        $sym = "[category documentation] $cat";  # make a fake, unique symbol that's not valid C.
+        $wikitypes{$sym} = $type;
+        my %sections = ();
+        $sections{'Remarks'} = $docstr;
+        $sections{'[footer]'} = $notdocstr;
+        $wikisyms{$sym} = \%sections;
+        my @section_order = ( 'Remarks', '[footer]' );
+        $wikisectionorder{$sym} = \@section_order;
+        next;
+    }
+
+    my $current_section = '[start]';
+    my @section_order = ( $current_section );
+    my %sections = ();
+    $sections{$current_section} = '';
+
+    my $firstline = 1;
+
+    while (<FH>) {
+        chomp;
+        my $orig = $_;
+        s/\A\s*//;
+        s/\s*\Z//;
+
+        if ($type eq 'mediawiki') {
+            if (defined($wikipreamble) && $firstline && /\A\=\=\=\=\=\= (.*?) \=\=\=\=\=\=\Z/ && ($1 eq $wikipreamble)) {
+                $firstline = 0;  # skip this.
+                next;
+            } elsif (/\A\= (.*?) \=\Z/) {
+                $firstline = 0;
+                $current_section = ($1 eq $sym) ? '[Brief]' : $1;
+                die("Doubly-defined section '$current_section' in '$dent'!\n") if defined $sections{$current_section};
+                push @section_order, $current_section;
+                $sections{$current_section} = '';
+            } elsif (/\A\=\= (.*?) \=\=\Z/) {
+                $firstline = 0;
+                $current_section = ($1 eq $sym) ? '[Brief]' : $1;
+                die("Doubly-defined section '$current_section' in '$dent'!\n") if defined $sections{$current_section};
+                push @section_order, $current_section;
+                $sections{$current_section} = '';
+                next;
+            } elsif (/\A\-\-\-\-\Z/) {
+                $firstline = 0;
+                $current_section = '[footer]';
+                die("Doubly-defined section '$current_section' in '$dent'!\n") if defined $sections{$current_section};
+                push @section_order, $current_section;
+                $sections{$current_section} = '';
+                next;
+            }
+        } elsif ($type eq 'md') {
+            if (defined($wikipreamble) && $firstline && /\A\#\#\#\#\#\# (.*?)\Z/ && ($1 eq $wikipreamble)) {
+                $firstline = 0;  # skip this.
+                next;
+            } elsif (/\A\#+ (.*?)\Z/) {
+                $firstline = 0;
+                $current_section = ($1 eq $sym) ? '[Brief]' : $1;
+                die("Doubly-defined section '$current_section' in '$dent'!\n") if defined $sections{$current_section};
+                push @section_order, $current_section;
+                $sections{$current_section} = '';
+                next;
+            } elsif (/\A\-\-\-\-\Z/) {
+                $firstline = 0;
+                $current_section = '[footer]';
+                die("Doubly-defined section '$current_section' in '$dent'!\n") if defined $sections{$current_section};
+                push @section_order, $current_section;
+                $sections{$current_section} = '';
+                next;
+            }
+        } else {
+            die("Unexpected wiki file type. Fixme!");
+        }
+
+        if ($firstline) {
+            $firstline = ($_ ne '');
+        }
+        if (!$firstline) {
+            $sections{$current_section} .= "$orig\n";
+        }
+    }
+    close(FH);
+
+    foreach (keys %sections) {
+        $sections{$_} =~ s/\A\n+//;
+        $sections{$_} =~ s/\n+\Z//;
+        $sections{$_} .= "\n";
+    }
+
+    # older section name we used, migrate over from it.
+    if (defined $sections{'Related Functions'}) {
+        if (not defined $sections{'See Also'}) {
+            $sections{'See Also'} = $sections{'Related Functions'};
+        }
+        delete $sections{'Related Functions'};
+    }
+
+    if (0) {
+        foreach (@section_order) {
+            print("$sym SECTION '$_':\n");
+            print($sections{$_});
+            print("\n\n");
+        }
+    }
+
+    $wikitypes{$sym} = $type;
+    $wikisyms{$sym} = \%sections;
+    $wikisectionorder{$sym} = \@section_order;
+}
+closedir(DH);
+
+delete $wikisyms{"Undocumented"};
+
+{
+    my $path = "$wikipath/Undocumented.md";
+    open(my $fh, '>', $path) or die("Can't open '$path': $!\n");
+
+    print $fh "# Undocumented\n\n";
+    print_undocumented_section($fh, 'Functions', 1);
+    #print_undocumented_section($fh, 'Macros', 2);
+
+    close($fh);
+}
+
+if ($warn_about_missing) {
+    foreach (keys %wikisyms) {
+        my $sym = $_;
+        if (not defined $headersyms{$sym}) {
+            print STDERR "WARNING: $sym defined in the wiki but not the headers!\n";
+        }
+    }
+
+    foreach (keys %headersyms) {
+        my $sym = $_;
+        if (not defined $wikisyms{$sym}) {
+            print STDERR "WARNING: $sym defined in the headers but not the wiki!\n";
+        }
+    }
+}
+
+if ($copy_direction == 1) {  # --copy-to-headers
+    my %changed_headers = ();
+
+    $dewikify_mode = 'md';
+    $wordwrap_mode = 'md';   # the headers use Markdown format.
+
+    foreach (keys %headersyms) {
+        my $sym = $_;
+        next if not defined $wikisyms{$sym};  # don't have a page for that function, skip it.
+        my $symtype = $headersymstype{$sym};
+        my $wikitype = $wikitypes{$sym};
+        my $sectionsref = $wikisyms{$sym};
+        my $remarks = $sectionsref->{'Remarks'};
+        my $returns = $sectionsref->{'Return Value'};
+        my $threadsafety = $sectionsref->{'Thread Safety'};
+        my $version = $sectionsref->{'Version'};
+        my $related = $sectionsref->{'See Also'};
+        my $deprecated = $sectionsref->{'Deprecated'};
+        my $brief = $sectionsref->{'[Brief]'};
+        my $addblank = 0;
+        my $str = '';
+
+        my $params = undef;
+        my $paramstr = undef;
+
+        if ($symtype == -1) {  # category documentation block.
+            # nothing to be done here.
+        } elsif (($symtype == 1) || (($symtype == 5))) {  # we'll assume a typedef (5) with a \param is a function pointer typedef.
+            $params = $sectionsref->{'Function Parameters'};
+            $paramstr = '\param';
+        } elsif ($symtype == 2) {
+            $params = $sectionsref->{'Macro Parameters'};
+            $paramstr = '\param';
+        } elsif ($symtype == 3) {
+            $params = $sectionsref->{'Fields'};
+            $paramstr = '\field';
+        } elsif ($symtype == 4) {
+            $params = $sectionsref->{'Values'};
+            $paramstr = '\value';
+        } else {
+            die("Unexpected symtype $symtype");
+        }
+
+        $headersymshasdoxygen{$sym} = 1;  # Added/changed doxygen for this header.
+
+        $brief = dewikify($wikitype, $brief);
+        $brief =~ s/\A(.*?\.) /$1\n/;  # \brief should only be one sentence, delimited by a period+space. Split if necessary.
+        my @briefsplit = split /\n/, $brief;
+        $brief = shift @briefsplit;
+
+        if (defined $remarks) {
+            $remarks = join("\n", @briefsplit) . dewikify($wikitype, $remarks);
+        }
+
+        if (defined $brief) {
+            $str .= "\n" if $addblank; $addblank = 1;
+            $str .= wordwrap($brief) . "\n";
+        }
+
+        if (defined $remarks) {
+            $str .= "\n" if $addblank; $addblank = 1;
+            $str .= wordwrap($remarks) . "\n";
+        }
+
+        if (defined $deprecated) {
+            # !!! FIXME: lots of code duplication in all of these.
+            $str .= "\n" if $addblank; $addblank = 1;
+            my $v = dewikify($wikitype, $deprecated);
+            my $whitespacelen = length("\\deprecated") + 1;
+            my $whitespace = ' ' x $whitespacelen;
+            $v = wordwrap($v, -$whitespacelen);
+            my @desclines = split /\n/, $v;
+            my $firstline = shift @desclines;
+            $str .= "\\deprecated $firstline\n";
+            foreach (@desclines) {
+                $str .= "${whitespace}$_\n";
+            }
+        }
+
+        if (defined $params) {
+            $str .= "\n" if $addblank; $addblank = (defined $returns) ? 0 : 1;
+            my @lines = split /\n/, dewikify($wikitype, $params);
+            if ($wikitype eq 'mediawiki') {
+                die("Unexpected data parsing MediaWiki table") if (shift @lines ne '{|');  # Dump the '{|' start
+                while (scalar(@lines) >= 3) {
+                    my $c_datatype = shift @lines;
+                    my $name = shift @lines;
+                    my $desc = shift @lines;
+                    my $terminator;  # the '|-' or '|}' line.
+
+                    if (($desc eq '|-') or ($desc eq '|}') or (not $desc =~ /\A\|/)) {  # we seem to be out of cells, which means there was no datatype column on this one.
+                        $terminator = $desc;
+                        $desc = $name;
+                        $name = $c_datatype;
+                        $c_datatype = '';
+                    } else {
+                        $terminator = shift @lines;
+                    }
+
+                    last if ($terminator ne '|-') and ($terminator ne '|}');  # we seem to have run out of table.
+                    $name =~ s/\A\|\s*//;
+                    $name =~ s/\A\*\*(.*?)\*\*/$1/;
+                    $name =~ s/\A\'\'\'(.*?)\'\'\'/$1/;
+                    $desc =~ s/\A\|\s*//;
+                    #print STDERR "SYM: $sym   CDATATYPE: $c_datatype  NAME: $name   DESC: $desc TERM: $terminator\n";
+                    my $whitespacelen = length($name) + 8;
+                    my $whitespace = ' ' x $whitespacelen;
+                    $desc = wordwrap($desc, -$whitespacelen);
+                    my @desclines = split /\n/, $desc;
+                    my $firstline = shift @desclines;
+                    $str .= "$paramstr $name $firstline\n";
+                    foreach (@desclines) {
+                        $str .= "${whitespace}$_\n";
+                    }
+                }
+            } elsif ($wikitype eq 'md') {
+                my $l;
+                $l = shift @lines;
+                die("Unexpected data parsing Markdown table") if (not $l =~ /\A(\s*\|)?\s*\|\s*\|\s*\|\s*\Z/);
+                $l = shift @lines;
+                die("Unexpected data parsing Markdown table") if (not $l =~ /\A\s*(\|\s*\-*\s*)?\|\s*\-*\s*\|\s*\-*\s*\|\s*\Z/);
+                while (scalar(@lines) >= 1) {
+                    $l = shift @lines;
+                    my $name;
+                    my $desc;
+                    if ($l =~ /\A\s*\|\s*(.*?)\s*\|\s*(.*?)\s*\|\s*(.*?)\s*\|\s*\Z/) {
+                        # c datatype is $1, but we don't care about it here.
+                        $name = $2;
+                        $desc = $3;
+                    } elsif ($l =~ /\A\s*\|\s*(.*?)\s*\|\s*(.*?)\s*\|\s*\Z/) {
+                        $name = $1;
+                        $desc = $2;
+                    } else {
+                        last;  # we seem to have run out of table.
+                    }
+
+                    $name =~ s/\A\*\*(.*?)\*\*/$1/;
+                    $name =~ s/\A\'\'\'(.*?)\'\'\'/$1/;
+                    #print STDERR "SYM: $sym   NAME: $name   DESC: $desc\n";
+                    my $whitespacelen = length($name) + 8;
+                    my $whitespace = ' ' x $whitespacelen;
+                    $desc = wordwrap($desc, -$whitespacelen);
+                    my @desclines = split /\n/, $desc;
+                    my $firstline = shift @desclines;
+                    $str .= "$paramstr $name $firstline\n";
+                    foreach (@desclines) {
+                        $str .= "${whitespace}$_\n";
+                    }
+                }
+            } else {
+                die("write me");
+            }
+        }
+
+        if (defined $returns) {
+            $str .= "\n" if $addblank; $addblank = 1;
+            my $r = dewikify($wikitype, $returns);
+            $r =~ s/\A\(.*?\)\s*//;  # Chop datatype in parentheses off the front.
+            my $retstr = "\\returns";
+            if ($r =~ s/\AReturn(s?)\s+//) {
+                $retstr = "\\return$1";
+            }
+
+            my $whitespacelen = length($retstr) + 1;
+            my $whitespace = ' ' x $whitespacelen;
+            $r = wordwrap($r, -$whitespacelen);
+            my @desclines = split /\n/, $r;
+            my $firstline = shift @desclines;
+            $str .= "$retstr $firstline\n";
+            foreach (@desclines) {
+                $str .= "${whitespace}$_\n";
+            }
+        }
+
+        if (defined $threadsafety) {
+            # !!! FIXME: lots of code duplication in all of these.
+            $str .= "\n" if $addblank; $addblank = 1;
+            my $v = dewikify($wikitype, $threadsafety);
+            my $whitespacelen = length("\\threadsafety") + 1;
+            my $whitespace = ' ' x $whitespacelen;
+            $v = wordwrap($v, -$whitespacelen);
+            my @desclines = split /\n/, $v;
+            my $firstline = shift @desclines;
+            $str .= "\\threadsafety $firstline\n";
+            foreach (@desclines) {
+                $str .= "${whitespace}$_\n";
+            }
+        }
+
+        if (defined $version) {
+            # !!! FIXME: lots of code duplication in all of these.
+            $str .= "\n" if $addblank; $addblank = 1;
+            my $v = dewikify($wikitype, $version);
+            my $whitespacelen = length("\\since") + 1;
+            my $whitespace = ' ' x $whitespacelen;
+            $v = wordwrap($v, -$whitespacelen);
+            my @desclines = split /\n/, $v;
+            my $firstline = shift @desclines;
+            $str .= "\\since $firstline\n";
+            foreach (@desclines) {
+                $str .= "${whitespace}$_\n";
+            }
+        }
+
+        if (defined $related) {
+            # !!! FIXME: lots of code duplication in all of these.
+            $str .= "\n" if $addblank; $addblank = 1;
+            my $v = dewikify($wikitype, $related);
+            my @desclines = split /\n/, $v;
+            foreach (@desclines) {
+                s/\(\)\Z//;  # Convert "SDL_Func()" to "SDL_Func"
+                s/\[\[(.*?)\]\]/$1/;  # in case some wikilinks remain.
+                s/\[(.*?)\]\(.*?\)/$1/;  # in case some wikilinks remain.
+                s/\A\/*//;
+                s/\A\s*[\:\*\-]\s*//;
+                s/\A\s+//;
+                s/\s+\Z//;
+                $str .= "\\sa $_\n";
+            }
+        }
+
+        my $header = $headersymslocation{$sym};
+        my $contentsref = $headers{$header};
+        my $chunk = $headersymschunk{$sym};
+
+        my @lines = split /\n/, $str;
+
+        my $addnewline = (($chunk > 0) && ($$contentsref[$chunk-1] ne '')) ? "\n" : '';
+
+        my $output = "$addnewline/**\n";
+        foreach (@lines) {
+            chomp;
+            s/\s*\Z//;
+            if ($_ eq '') {
+                $output .= " *\n";
+            } else {
+                $output .= " * $_\n";
+            }
+        }
+        $output .= " */";
+
+        #print("$sym:\n[$output]\n\n");
+
+        $$contentsref[$chunk] = $output;
+        #$$contentsref[$chunk+1] = $headerdecls{$sym};
+
+        $changed_headers{$header} = 1;
+    }
+
+    foreach (keys %changed_headers) {
+        my $header = $_;
+
+        # this is kinda inefficient, but oh well.
+        my @removelines = ();
+        foreach (keys %headersymslocation) {
+            my $sym = $_;
+            next if $headersymshasdoxygen{$sym};
+            next if $headersymslocation{$sym} ne $header;
+            # the index of the blank line we put before the function declaration in case we needed to replace it with new content from the wiki.
+            push @removelines, $headersymschunk{$sym};
+        }
+
+        my $contentsref = $headers{$header};
+        foreach (@removelines) {
+            delete $$contentsref[$_];  # delete DOES NOT RENUMBER existing elements!
+        }
+
+        my $path = "$incpath/$header.tmp";
+        open(FH, '>', $path) or die("Can't open '$path': $!\n");
+        foreach (@$contentsref) {
+            print FH "$_\n" if defined $_;
+        }
+        close(FH);
+        rename($path, "$incpath/$header") or die("Can't rename '$path' to '$incpath/$header': $!\n");
+    }
+
+    if (defined $readmepath) {
+        mkdir($readmepath);  # just in case
+        opendir(DH, $wikipath) or die("Can't opendir '$wikipath': $!\n");
+        while (readdir(DH)) {
+            my $dent = $_;
+            if ($dent =~ /\A(README|INTRO)\-.*?\.md\Z/) {  # we only bridge Markdown files here that start with "README-" or "INTRO-".
+                filecopy("$wikipath/$dent", "$readmepath/$dent", "\n");
+            }
+        }
+        closedir(DH);
+    }
+
+} elsif ($copy_direction == -1) { # --copy-to-wiki
+
+    my %briefs = ();  # $briefs{'SDL_OpenAudio'} -> the \brief string for the function.
+
+    if (defined $changeformat) {
+        $dewikify_mode = $changeformat;
+        $wordwrap_mode = $changeformat;
+    }
+
+    foreach (keys %headersyms) {
+        my $sym = $_;
+        next if not $headersymshasdoxygen{$sym};
+        next if $sym =~ /\A\[category documentation\]/;   # not real symbols, we handle this elsewhere.
+        my $symtype = $headersymstype{$sym};
+        my $origwikitype = defined $wikitypes{$sym} ? $wikitypes{$sym} : 'md';  # default to MarkDown for new stuff.
+        my $wikitype = (defined $changeformat) ? $changeformat : $origwikitype;
+        die("Unexpected wikitype '$wikitype'") if (($wikitype ne 'mediawiki') and ($wikitype ne 'md') and ($wikitype ne 'manpage'));
+
+        #print("$sym\n"); next;
+
+        $wordwrap_mode = $wikitype;
+
+        my $raw = $headersyms{$sym};  # raw doxygen text with comment characters stripped from start/end and start of each line.
+        next if not defined $raw;
+        $raw =~ s/\A\s*\\brief\s+//;  # Technically we don't need \brief (please turn on JAVADOC_AUTOBRIEF if you use Doxygen), so just in case one is present, strip it.
+
+        my @doxygenlines = split /\n/, $raw;
+        my $brief = '';
+        while (@doxygenlines) {
+            last if $doxygenlines[0] =~ /\A\\/;  # some sort of doxygen command, assume we're past the general remarks.
+            last if $doxygenlines[0] =~ /\A\s*\Z/;  # blank line? End of paragraph, done.
+            my $l = shift @doxygenlines;
+            chomp($l);
+            $l =~ s/\A\s*//;
+            $l =~ s/\s*\Z//;
+            $brief .= "$l ";
+        }
+
+        $brief =~ s/\s+\Z//;
+        $brief =~ s/\A(.*?\.) /$1\n\n/;  # \brief should only be one sentence, delimited by a period+space. Split if necessary.
+        my @briefsplit = split /\n/, $brief;
+
+        next if not defined $briefsplit[0];  # No brief text? Probably a bogus Doxygen comment, skip it.
+
+        $brief = wikify($wikitype, shift @briefsplit) . "\n";
+        @doxygenlines = (@briefsplit, @doxygenlines);
+
+        my $remarks = '';
+        while (@doxygenlines) {
+            last if $doxygenlines[0] =~ /\A\\/;  # some sort of doxygen command, assume we're past the general remarks.
+            my $l = shift @doxygenlines;
+            $remarks .= "$l\n";
+        }
+
+        #print("REMARKS:\n\n $remarks\n\n");
+
+        $remarks = wordwrap(wikify($wikitype, $remarks));
+        $remarks =~ s/\A\s*//;
+        $remarks =~ s/\s*\Z//;
+
+        my $decl = $headerdecls{$sym};
+
+        my $syntax = '';
+        if ($wikitype eq 'mediawiki') {
+            $syntax = "<syntaxhighlight lang='c'>\n$decl</syntaxhighlight>\n";
+        } elsif ($wikitype eq 'md') {
+            $decl =~ s/\n+\Z//;
+            $syntax = "```c\n$decl\n```\n";
+        } else { die("Expected wikitype '$wikitype'"); }
+
+        my %sections = ();
+        $sections{'[Brief]'} = $brief;  # include this section even if blank so we get a title line.
+        $sections{'Remarks'} = "$remarks\n" if $remarks ne '';
+        $sections{'Syntax'} = $syntax;
+
+        $briefs{$sym} = $brief;
+
+        my %params = ();  # have to parse these and build up the wiki tables after, since Markdown needs to know the length of the largest string.  :/
+        my @paramsorder = ();
+        my $fnsigparams = $headersymsparaminfo{$sym};
+        my $has_returns = 0;
+        my $has_threadsafety = 0;
+
+        while (@doxygenlines) {
+            my $l = shift @doxygenlines;
+            # We allow param/field/value interchangeably, even if it doesn't make sense. The next --copy-to-headers will correct it anyhow.
+            if ($l =~ /\A\\(param|field|value)\s+(.*?)\s+(.*)\Z/) {
+                my $arg = $2;
+                my $desc = $3;
+                while (@doxygenlines) {
+                    my $subline = $doxygenlines[0];
+                    $subline =~ s/\A\s*//;
+                    last if $subline =~ /\A\\/;  # some sort of doxygen command, assume we're past this thing.
+                    shift @doxygenlines;  # dump this line from the array; we're using it.
+                    if ($subline eq '') {  # empty line, make sure it keeps the newline char.
+                        $desc .= "\n";
+                    } else {
+                        $desc .= " $subline";
+                    }
+                }
+
+                $desc =~ s/[\s\n]+\Z//ms;
+
+                if (0) {
+                    if (($desc =~ /\A[a-z]/) && (not $desc =~ /$apiprefixregex/)) {
+                        print STDERR "WARNING: $sym\'s '\\param $arg' text starts with a lowercase letter: '$desc'. Fixing.\n";
+                        $desc = ucfirst($desc);
+                    }
+                }
+
+                if (not $desc =~ /[\.\!]\Z/) {
+                    print STDERR "WARNING: $sym\'s '\\param $arg' text doesn't end with punctuation: '$desc'. Fixing.\n";
+                    $desc .= '.';
+                }
+
+                # Validate this param.
+                if (defined($params{$arg})) {
+                    print STDERR "WARNING: Symbol '$sym' has multiple '\\param $arg' declarations! Only keeping the first one!\n";
+                } elsif (defined $fnsigparams) {
+                    my $found = 0;
+                    for (my $i = 0; $i < scalar(@$fnsigparams); $i += 2) {
+                        $found = 1, last if (@$fnsigparams[$i] eq $arg);
+                    }
+                    if (!$found) {
+                        print STDERR "WARNING: Symbol '$sym' has a '\\param $arg' for a param that doesn't exist. It will be removed!\n";
+                    }
+                }
+
+                # We need to know the length of the longest string to make Markdown tables, so we just store these off until everything is parsed.
+                $params{$arg} = $desc;
+                push @paramsorder, $arg;
+            } elsif ($l =~ /\A\\r(eturns?)\s+(.*)\Z/) {
+                $has_returns = 1;
+                # !!! FIXME: complain if this isn't a function or macro.
+                my $retstr = "R$1";  # "Return" or "Returns"
+                my $desc = $2;
+
+                while (@doxygenlines) {
+                    my $subline = $doxygenlines[0];
+                    $subline =~ s/\A\s*//;
+                    last if $subline =~ /\A\\/;  # some sort of doxygen command, assume we're past this thing.
+                    shift @doxygenlines;  # dump this line from the array; we're using it.
+                    if ($subline eq '') {  # empty line, make sure it keeps the newline char.
+                        $desc .= "\n";
+                    } else {
+                        $desc .= " $subline";
+                    }
+                }
+                $desc =~ s/[\s\n]+\Z//ms;
+
+                if (0) {
+                    if (($desc =~ /\A[A-Z]/) && (not $desc =~ /$apiprefixregex/)) {
+                        print STDERR "WARNING: $sym\'s '\\returns' text starts with a capital letter: '$desc'. Fixing.\n";
+                        $desc = lcfirst($desc);
+                    }
+                }
+
+                if (not $desc =~ /[\.\!]\Z/) {
+                    print STDERR "WARNING: $sym\'s '\\returns' text doesn't end with punctuation: '$desc'. Fixing.\n";
+                    $desc .= '.';
+                }
+
+                # Make sure the \returns info is valid.
+                my $rettype = $headersymsrettype{$sym};
+                die("Don't have a rettype for '$sym' for some reason!") if (($symtype == 1) && (not defined($rettype)));
+                if (defined($sections{'Return Value'})) {
+                    print STDERR "WARNING: Symbol '$sym' has multiple '\\return' declarations! Only keeping the first one!\n";
+                } elsif (($symtype != 1) && ($symtype != 2) && ($symtype != 5)) {  # !!! FIXME: if 5, make sure it's a function pointer typedef!
+                    print STDERR "WARNING: Symbol '$sym' has a '\\return' declaration but isn't a function or macro! Removing it!\n";
+                } elsif (($symtype == 1) && ($headersymsrettype{$sym} eq 'void')) {
+                    print STDERR "WARNING: Function '$sym' has a '\\returns' declaration but function returns void! Removing it!\n";
+                } else {
+                    my $rettypestr = defined($rettype) ? ('(' . wikify($wikitype, $rettype) . ') ') : '';
+                    $sections{'Return Value'} = wordwrap("$rettypestr$retstr ". wikify($wikitype, $desc)) . "\n";
+                }
+            } elsif ($l =~ /\A\\deprecated\s+(.*)\Z/) {
+                my $desc = $1;
+                while (@doxygenlines) {
+                    my $subline = $doxygenlines[0];
+                    $subline =~ s/\A\s*//;
+                    last if $subline =~ /\A\\/;  # some sort of doxygen command, assume we're past this thing.
+                    shift @doxygenlines;  # dump this line from the array; we're using it.
+                    if ($subline eq '') {  # empty line, make sure it keeps the newline char.
+                        $desc .= "\n";
+                    } else {
+                        $desc .= " $subline";
+                    }
+                }
+                $desc =~ s/[\s\n]+\Z//ms;
+                $sections{'Deprecated'} = wordwrap(wikify($wikitype, $desc)) . "\n";
+            } elsif ($l =~ /\A\\since\s+(.*)\Z/) {
+                my $desc = $1;
+                while (@doxygenlines) {
+                    my $subline = $doxygenlines[0];
+                    $subline =~ s/\A\s*//;
+                    last if $subline =~ /\A\\/;  # some sort of doxygen command, assume we're past this thing.
+                    shift @doxygenlines;  # dump this line from the array; we're using it.
+                    if ($subline eq '') {  # empty line, make sure it keeps the newline char.
+                        $desc .= "\n";
+                    } else {
+                        $desc .= " $subline";
+                    }
+                }
+                $desc =~ s/[\s\n]+\Z//ms;
+                $sections{'Version'} = wordwrap(wikify($wikitype, $desc)) . "\n";
+            } elsif ($l =~ /\A\\threadsafety\s+(.*)\Z/) {
+                my $desc = $1;
+                while (@doxygenlines) {
+                    my $subline = $doxygenlines[0];
+                    $subline =~ s/\A\s*//;
+                    last if $subline =~ /\A\\/;  # some sort of doxygen command, assume we're past this thing.
+                    shift @doxygenlines;  # dump this line from the array; we're using it.
+                    if ($subline eq '') {  # empty line, make sure it keeps the newline char.
+                        $desc .= "\n";
+                    } else {
+                        $desc .= " $subline";
+                    }
+                }
+                $desc =~ s/[\s\n]+\Z//ms;
+                $sections{'Thread Safety'} = wordwrap(wikify($wikitype, $desc)) . "\n";
+                $has_threadsafety = 1;
+            } elsif ($l =~ /\A\\sa\s+(.*)\Z/) {
+                my $sa = $1;
+                $sa =~ s/\(\)\Z//;  # Convert "SDL_Func()" to "SDL_Func"
+                $sections{'See Also'} = '' if not defined $sections{'See Also'};
+                if ($wikitype eq 'mediawiki') {
+                    $sections{'See Also'} .= ":[[$sa]]\n";
+                } elsif ($wikitype eq 'md') {
+                    $sections{'See Also'} .= "- [$sa]($sa)\n";
+                } else { die("Expected wikitype '$wikitype'"); }
+            }
+        }
+
+        if (($symtype == 1) && ($headersymsrettype{$sym} ne 'void') && !$has_returns) {
+            print STDERR "WARNING: Function '$sym' has a non-void return type but no '\\returns' declaration\n";
+        }
+
+        # !!! FIXME: uncomment this when we're trying to clean this up in the headers.
+        #if (($symtype == 1) && !$has_threadsafety) {
+        #    print STDERR "WARNING: Function '$sym' doesn't have a '\\threadsafety' declaration\n";
+        #}
+
+        # Make sure %params is in the same order as the actual function signature and add C datatypes...
+        my $params_has_c_datatype = 0;
+        my @final_params = ();
+        if (($symtype == 1) && (defined($headersymsparaminfo{$sym}))) {  # is a function and we have param info for it...
+            my $fnsigparams = $headersymsparaminfo{$sym};
+            for (my $i = 0; $i < scalar(@$fnsigparams); $i += 2) {
+                my $paramname = @$fnsigparams[$i];
+                my $paramdesc = $params{$paramname};
+                if (defined($paramdesc)) {
+                    push @final_params, $paramname;             # name
+                    push @final_params, @$fnsigparams[$i+1];    # C datatype
+                    push @final_params, $paramdesc;             # description
+                    $params_has_c_datatype = 1 if (defined(@$fnsigparams[$i+1]));
+                } else {
+                    print STDERR "WARNING: Symbol '$sym' is missing a '\\param $paramname' declaration!\n";
+                }
+            }
+        } else {
+            foreach (@paramsorder) {
+                my $paramname = $_;
+                my $paramdesc = $params{$paramname};
+                if (defined($paramdesc)) {
+                    push @final_params, $_;
+                    push @final_params, undef;
+                    push @final_params, $paramdesc;
+                }
+            }
+        }
+
+        my $hfiletext = $wikiheaderfiletext;
+        $hfiletext =~ s/\%fname\%/$headersymslocation{$sym}/g;
+        $sections{'Header File'} = "$hfiletext\n";
+
+        # Make sure this ends with a double-newline.
+        $sections{'See Also'} .= "\n" if defined $sections{'See Also'};
+
+        if (0) {  # !!! FIXME: this was a useful hack, but this needs to be generalized if we're going to do this always.
+            # Plug in a \since section if one wasn't listed.
+            if (not defined $sections{'Version'}) {
+                my $symtypename;
+                if ($symtype == 1) {
+                    $symtypename = 'function';
+                } elsif ($symtype == 2) {
+                    $symtypename = 'macro';
+                } elsif ($symtype == 3) {
+                    $symtypename = 'struct';
+                } elsif ($symtype == 4) {
+                    $symtypename = 'enum';
+                } elsif ($symtype == 5) {
+                    $symtypename = 'datatype';
+                } else {
+                    die("Unexpected symbol type $symtype!");
+                }
+                my $str = "This $symtypename is available since $projectshortname 3.0.0.";
+                $sections{'Version'} = wordwrap(wikify($wikitype, $str)) . "\n";
+            }
+        }
+
+        # We can build the wiki table now that we have all the data.
+        if (scalar(@final_params) > 0) {
+            my $str = '';
+            if ($wikitype eq 'mediawiki') {
+                while (scalar(@final_params) > 0) {
+                    my $arg = shift @final_params;
+                    my $c_datatype = shift @final_params;
+                    my $desc = wikify($wikitype, shift @final_params);
+                    $c_datatype = '' if not defined $c_datatype;
+                    $str .= ($str eq '') ? "{|\n" : "|-\n";
+                    $str .= "|$c_datatype\n" if $params_has_c_datatype;
+                    $str .= "|'''$arg'''\n";
+                    $str .= "|$desc\n";
+                }
+                $str .= "|}\n";
+            } elsif ($wikitype eq 'md') {
+                my $longest_arg = 0;
+                my $longest_c_datatype = 0;
+                my $longest_desc = 0;
+                my $which = 0;
+                foreach (@final_params) {
+                    if ($which == 0) {
+                        my $len = length($_);
+                        $longest_arg = $len if ($len > $longest_arg);
+                        $which = 1;
+                    } elsif ($which == 1) {
+                        if (defined($_)) {
+                            my $len = length(wikify($wikitype, $_));
+                            $longest_c_datatype = $len if ($len > $longest_c_datatype);
+                        }
+                        $which = 2;
+                    } else {
+                        my $len = length(wikify($wikitype, $_));
+                        $longest_desc = $len if ($len > $longest_desc);
+                        $which = 0;
+                    }
+                }
+
+                # Markdown tables are sort of obnoxious.
+                my $c_datatype_cell;
+                $c_datatype_cell = ($longest_c_datatype > 0) ? ('| ' . (' ' x ($longest_c_datatype)) . ' ') : '';
+                $str .= $c_datatype_cell . '| ' . (' ' x ($longest_arg+4)) . ' | ' . (' ' x $longest_desc) . " |\n";
+                $c_datatype_cell = ($longest_c_datatype > 0) ? ('| ' . ('-' x ($longest_c_datatype)) . ' ') : '';
+                $str .= $c_datatype_cell . '| ' . ('-' x ($longest_arg+4)) . ' | ' . ('-' x $longest_desc) . " |\n";
+
+                while (@final_params) {
+                    my $arg = shift @final_params;
+                    my $c_datatype = shift @final_params;
+                    $c_datatype_cell = '';
+                    if ($params_has_c_datatype) {
+                        $c_datatype = defined($c_datatype) ? wikify($wikitype, $c_datatype) : '';
+                        $c_datatype_cell = ($longest_c_datatype > 0) ? ("| $c_datatype " . (' ' x ($longest_c_datatype - length($c_datatype)))) : '';
+                    }
+                    my $desc = wikify($wikitype, shift @final_params);
+                    $str .= $c_datatype_cell . "| **$arg** " . (' ' x ($longest_arg - length($arg))) . "| $desc" . (' ' x ($longest_desc - length($desc))) . " |\n";
+                }
+            } else {
+                die("Unexpected wikitype!");  # should have checked this elsewhere.
+            }
+            $sections{'Function Parameters'} = $str;
+        }
+
+        my $path = "$wikipath/$sym.${wikitype}.tmp";
+        open(FH, '>', $path) or die("Can't open '$path': $!\n");
+
+        my $sectionsref = $wikisyms{$sym};
+
+        foreach (@standard_wiki_sections) {
+            # drop sections we either replaced or removed from the original wiki's contents.
+            if (not defined $only_wiki_sections{$_}) {
+                delete($$sectionsref{$_});
+            }
+        }
+
+        my $wikisectionorderref = $wikisectionorder{$sym};
+
+        # Make sure there's a footer in the wiki that puts this function in CategoryAPI...
+        if (not $$sectionsref{'[footer]'}) {
+            $$sectionsref{'[footer]'} = '';
+            push @$wikisectionorderref, '[footer]';
+        }
+
+        # If changing format, convert things that otherwise are passed through unmolested.
+        if (defined $changeformat) {
+            if (($dewikify_mode eq 'md') and ($origwikitype eq 'mediawiki')) {
+                $$sectionsref{'[footer]'} =~ s/\[\[(Category[a-zA-Z0-9_]+)\]\]/[$1]($1)/g;
+            } elsif (($dewikify_mode eq 'mediawiki') and ($origwikitype eq 'md')) {
+                $$sectionsref{'[footer]'} =~ s/\[(Category[a-zA-Z0-9_]+)\]\(.*?\)/[[$1]]/g;
+            }
+
+            foreach (keys %only_wiki_sections) {
+                my $sect = $_;
+                if (defined $$sectionsref{$sect}) {
+                    $$sectionsref{$sect} = wikify($wikitype, dewikify($origwikitype, $$sectionsref{$sect}));
+                }
+            }
+        }
+
+        if ($symtype != -1) {  # Don't do these in category documentation block
+            my $footer = $$sectionsref{'[footer]'};
+
+            my $symtypename;
+            if ($symtype == 1) {
+                $symtypename = 'Function';
+            } elsif ($symtype == 2) {
+                $symtypename = 'Macro';
+            } elsif ($symtype == 3) {
+                $symtypename = 'Struct';
+            } elsif ($symtype == 4) {
+                $symtypename = 'Enum';
+            } elsif ($symtype == 5) {
+                $symtypename = 'Datatype';
+            } else {
+                die("Unexpected symbol type $symtype!");
+            }
+
+            my $symcategory = $headersymscategory{$sym};
+            if ($wikitype eq 'mediawiki') {
+                $footer =~ s/\[\[CategoryAPI\]\],?\s*//g;
+                $footer =~ s/\[\[CategoryAPI${symtypename}\]\],?\s*//g;
+                $footer =~ s/\[\[Category${symcategory}\]\],?\s*//g if defined $symcategory;
+                $footer = "[[CategoryAPI]], [[CategoryAPI$symtypename]]" . (defined $symcategory ? ", [[Category$symcategory]]" : '') . (($footer eq '') ? "\n" : ", $footer");
+            } elsif ($wikitype eq 'md') {
+                $footer =~ s/\[CategoryAPI\]\(CategoryAPI\),?\s*//g;
+                $footer =~ s/\[CategoryAPI${symtypename}\]\(CategoryAPI${symtypename}\),?\s*//g;
+                $footer =~ s/\[Category${symcategory}\]\(Category${symcategory}\),?\s*//g if defined $symcategory;
+                $footer = "[CategoryAPI](CategoryAPI), [CategoryAPI$symtypename](CategoryAPI$symtypename)" . (defined $symcategory ? ", [Category$symcategory](Category$symcategory)" : '') . (($footer eq '') ? '' : ', ') . $footer;
+            } else { die("Unexpected wikitype '$wikitype'"); }
+            $$sectionsref{'[footer]'} = $footer;
+
+            if (defined $wikipreamble) {
+                my $wikified_preamble = wikify($wikitype, $wikipreamble);
+                if ($wikitype eq 'mediawiki') {
+                    print FH "====== $wikified_preamble ======\n";
+                } elsif ($wikitype eq 'md') {
+                    print FH "###### $wikified_preamble\n";
+                } else { die("Unexpected wikitype '$wikitype'"); }
+            }
+        }
+
+        my $prevsectstr = '';
+        my @ordered_sections = (@standard_wiki_sections, defined $wikisectionorderref ? @$wikisectionorderref : ());  # this copies the arrays into one.
+        foreach (@ordered_sections) {
+            my $sect = $_;
+            next if $sect eq '[start]';
+            next if (not defined $sections{$sect} and not defined $$sectionsref{$sect});
+            my $section = defined $sections{$sect} ? $sections{$sect} : $$sectionsref{$sect};
+
+            if ($sect eq '[footer]') {
+                # Make sure previous section ends with two newlines.
+                if (substr($prevsectstr, -1) ne "\n") {
+                    print FH "\n\n";
+                } elsif (substr($prevsectstr, -2) ne "\n\n") {
+                    print FH "\n";
+                }
+                print FH "----\n";   # It's the same in Markdown and MediaWiki.
+            } elsif ($sect eq '[Brief]') {
+                if ($wikitype eq 'mediawiki') {
+                    print FH  "= $sym =\n\n";
+                } elsif ($wikitype eq 'md') {
+                    print FH "# $sym\n\n";
+                } else { die("Unexpected wikitype '$wikitype'"); }
+            } else {
+                my $sectname = $sect;
+                if ($sectname eq 'Function Parameters') {  # We use this same table for different things depending on what we're documenting, so rename it now.
+                    if (($symtype == 1) || ($symtype == 5)) {  # function (or typedef, in case it's a function pointer type).
+                    } elsif ($symtype == 2) {  # macro
+                        $sectname = 'Macro Parameters';
+                    } elsif ($symtype == 3) {  # struct/union
+                        $sectname = 'Fields';
+                    } elsif ($symtype == 4) {  # enum
+                        $sectname = 'Values';
+                    } else {
+                        die("Unexpected symtype $symtype");
+                    }
+                }
+
+                if ($symtype != -1) {  # Not for category documentation block
+                    if ($wikitype eq 'mediawiki') {
+                        print FH  "\n== $sectname ==\n\n";
+                    } elsif ($wikitype eq 'md') {
+                        print FH "\n## $sectname\n\n";
+                    } else { die("Unexpected wikitype '$wikitype'"); }
+                }
+            }
+
+            my $sectstr = defined $sections{$sect} ? $sections{$sect} : $$sectionsref{$sect};
+            print FH $sectstr;
+
+            $prevsectstr = $sectstr;
+
+            # make sure these don't show up twice.
+            delete($sections{$sect});
+            delete($$sectionsref{$sect});
+        }
+
+        print FH "\n\n";
+        close(FH);
+
+        if (defined $changeformat and ($origwikitype ne $wikitype)) {
+            system("cd '$wikipath' ; git mv '$_.${origwikitype}' '$_.${wikitype}'");
+            unlink("$wikipath/$_.${origwikitype}");
+        }
+
+        rename($path, "$wikipath/$_.${wikitype}") or die("Can't rename '$path' to '$wikipath/$_.${wikitype}': $!\n");
+    }
+
+    # Write out simple redirector pages if they don't already exist.
+    foreach (keys %referenceonly) {
+        my $sym = $_;
+        my $refersto = $referenceonly{$sym};
+        my $path = "$wikipath/$sym.md";  # we only do Markdown for these.
+        next if (-f $path);  # don't overwrite if it already exists. Delete the file if you need a rebuild!
+        open(FH, '>', $path) or die("Can't open '$path': $!\n");
+
+        if (defined $wikipreamble) {
+            my $wikified_preamble = wikify('md', $wikipreamble);
+            print FH "###### $wikified_preamble\n";
+        }
+
+        my $category = 'CategoryAPIMacro';
+        if ($headersymstype{$refersto} == 4) {
+            $category = 'CategoryAPIEnumerators';  # NOT CategoryAPIEnum!
+        }
+
+        print FH "# $sym\n\nPlease refer to [$refersto]($refersto) for details.\n\n";
+        print FH "----\n";
+        print FH "[CategoryAPI](CategoryAPI), [$category]($category)\n\n";
+
+        close(FH);
+    }
+
+    # Write out Category pages...
+    foreach (keys %headercategorydocs) {
+        my $cat = $_;
+        my $sym = $headercategorydocs{$cat};  # fake symbol
+        my $raw = $headersyms{$sym};  # raw doxygen text with comment characters stripped from start/end and start of each line.
+        my $wikitype = defined($wikitypes{$sym}) ? $wikitypes{$sym} : 'md';
+        my $path = "$wikipath/Category$cat.$wikitype";
+
+        $raw = wordwrap(wikify($wikitype, $raw));
+
+        my $tmppath = "$path.tmp";
+        open(FH, '>', $tmppath) or die("Can't open '$tmppath': $!\n");
+        print FH "$raw\n\n";
+
+        if (! -f $path) {  # Doesn't exist at all? Write out a template file.
+            # If writing from scratch, it's always a Markdown file.
+            die("Unexpected wikitype '$wikitype'!") if $wikitype ne 'md';
+            print FH <<__EOF__
+
+<!-- END CATEGORY DOCUMENTATION -->
+
+## Functions
+
+<!-- DO NOT HAND-EDIT CATEGORY LISTS, THEY ARE AUTOGENERATED AND WILL BE OVERWRITTEN, BASED ON TAGS IN INDIVIDUAL PAGE FOOTERS. EDIT THOSE INSTEAD. -->
+<!-- BEGIN CATEGORY LIST: Category$cat, CategoryAPIFunction -->
+<!-- END CATEGORY LIST -->
+
+## Datatypes
+
+<!-- DO NOT HAND-EDIT CATEGORY LISTS, THEY ARE AUTOGENERATED AND WILL BE OVERWRITTEN, BASED ON TAGS IN INDIVIDUAL PAGE FOOTERS. EDIT THOSE INSTEAD. -->
+<!-- BEGIN CATEGORY LIST: Category$cat, CategoryAPIDatatype -->
+<!-- END CATEGORY LIST -->
+
+## Structs
+
+<!-- DO NOT HAND-EDIT CATEGORY LISTS, THEY ARE AUTOGENERATED AND WILL BE OVERWRITTEN, BASED ON TAGS IN INDIVIDUAL PAGE FOOTERS. EDIT THOSE INSTEAD. -->
+<!-- BEGIN CATEGORY LIST: Category$cat, CategoryAPIStruct -->
+<!-- END CATEGORY LIST -->
+
+## Enums
+
+<!-- DO NOT HAND-EDIT CATEGORY LISTS, THEY ARE AUTOGENERATED AND WILL BE OVERWRITTEN, BASED ON TAGS IN INDIVIDUAL PAGE FOOTERS. EDIT THOSE INSTEAD. -->
+<!-- BEGIN CATEGORY LIST: Category$cat, CategoryAPIEnum -->
+<!-- END CATEGORY LIST -->
+
+## Macros
+
+<!-- DO NOT HAND-EDIT CATEGORY LISTS, THEY ARE AUTOGENERATED AND WILL BE OVERWRITTEN, BASED ON TAGS IN INDIVIDUAL PAGE FOOTERS. EDIT THOSE INSTEAD. -->
+<!-- BEGIN CATEGORY LIST: Category$cat, CategoryAPIMacro -->
+<!-- END CATEGORY LIST -->
+
+----
+[CategoryAPICategory](CategoryAPICategory)
+
+__EOF__
+;
+        } else {
+            my $endstr = $wikisyms{$sym}->{'[footer]'};
+            if (defined($endstr)) {
+                print FH $endstr;
+            }
+        }
+
+        close(FH);
+        rename($tmppath, $path) or die("Can't rename '$tmppath' to '$path': $!\n");
+    }
+
+    # Write out READMEs...
+    if (defined $readmepath) {
+        if ( -d $readmepath ) {
+            mkdir($wikipath);  # just in case
+            opendir(DH, $readmepath) or die("Can't opendir '$readmepath': $!\n");
+            while (my $d = readdir(DH)) {
+                my $dent = $d;
+                if ($dent =~ /\A(README|INTRO)\-.*?\.md\Z/) {  # we only bridge Markdown files here that start with "README-" or "INTRO".
+                    filecopy("$readmepath/$dent", "$wikipath/$dent", "\n");
+                }
+            }
+            closedir(DH);
+
+            my @pages = ();
+            opendir(DH, $wikipath) or die("Can't opendir '$wikipath': $!\n");
+            while (my $d = readdir(DH)) {
+                my $dent = $d;
+                if ($dent =~ /\A((README|INTRO)\-.*?)\.md\Z/) {
+                    push @pages, $1;
+                }
+            }
+            closedir(DH);
+
+            open(FH, '>', "$wikipath/READMEs.md") or die("Can't open '$wikipath/READMEs.md': $!\n");
+            print FH "# All READMEs available here\n\n";
+            foreach (sort @pages) {
+                my $wikiname = $_;
+                print FH "- [$wikiname]($wikiname)\n";
+            }
+            close(FH);
+        }
+    }
+
+    # Write out quick reference pages...
+    if ($quickrefenabled) {
+        generate_quickref(\%briefs, "$wikipath/QuickReference.md", 0);
+        generate_quickref(\%briefs, "$wikipath/QuickReferenceNoUnicode.md", 1);
+    }
+
+    if ($envvarenabled and defined $envvarsymregex and defined $envvarsymreplace) {
+        generate_envvar_wiki_page(\%briefs, "$wikipath/EnvironmentVariables.md");
+    }
+
+} elsif ($copy_direction == -2) { # --copy-to-manpages
+    # This only takes from the wiki data, since it has sections we omit from the headers, like code examples.
+
+    File::Path::make_path("$manpath/man3");
+
+    $dewikify_mode = 'manpage';
+    $wordwrap_mode = 'manpage';
+
+    my $introtxt = '';
+    if (0) {
+    open(FH, '<', "$srcpath/LICENSE.txt") or die("Can't open '$srcpath/LICENSE.txt': $!\n");
+    while (<FH>) {
+        chomp;
+        $introtxt .= ".\\\" $_\n";
+    }
+    close(FH);
+    }
+
+    if (!$gitrev) {
+        $gitrev = `cd "$srcpath" ; git rev-list HEAD~..`;
+        chomp($gitrev);
+    }
+
+    # !!! FIXME
+    open(FH, '<', "$srcpath/$versionfname") or die("Can't open '$srcpath/$versionfname': $!\n");
+    my $majorver = 0;
+    my $minorver = 0;
+    my $microver = 0;
+    while (<FH>) {
+        chomp;
+        if (/$versionmajorregex/) {
+            $majorver = int($1);
+        } elsif (/$versionminorregex/) {
+            $minorver = int($1);
+        } elsif (/$versionmicroregex/) {
+            $microver = int($1);
+        }
+    }
+    close(FH);
+    my $fullversion = "$majorver.$minorver.$microver";
+
+    foreach (keys %headersyms) {
+        my $sym = $_;
+        next if not defined $wikisyms{$sym};  # don't have a page for that function, skip it.
+        next if $sym =~ /\A\[category documentation\]/;   # not real symbols
+        next if (defined $manpagesymbolfilterregex) && ($sym =~ /$manpagesymbolfilterregex/);
+        my $symtype = $headersymstype{$sym};
+        my $wikitype = $wikitypes{$sym};
+        my $sectionsref = $wikisyms{$sym};
+        my $remarks = $sectionsref->{'Remarks'};
+        my $returns = $sectionsref->{'Return Value'};
+        my $version = $sectionsref->{'Version'};
+        my $threadsafety = $sectionsref->{'Thread Safety'};
+        my $related = $sectionsref->{'See Also'};
+        my $examples = $sectionsref->{'Code Examples'};
+        my $deprecated = $sectionsref->{'Deprecated'};
+        my $headerfile = $manpageheaderfiletext;
+
+        my $params = undef;
+
+        if ($symtype == -1) {  # category documentation block.
+            # nothing to be done here.
+        } elsif (($symtype == 1) || (($symtype == 5))) {  # we'll assume a typedef (5) with a \param is a function pointer typedef.
+            $params = $sectionsref->{'Function Parameters'};
+        } elsif ($symtype == 2) {
+            $params = $sectionsref->{'Macro Parameters'};
+        } elsif ($symtype == 3) {
+            $params = $sectionsref->{'Fields'};
+        } elsif ($symtype == 4) {
+            $params = $sectionsref->{'Values'};
+        } else {
+            die("Unexpected symtype $symtype");
+        }
+
+        $headerfile =~ s/\%fname\%/$headersymslocation{$sym}/g;
+        $headerfile .= "\n";
+
+        my $mansection;
+        my $mansectionname;
+        if (($symtype == 1) || ($symtype == 2)) {  # functions or macros
+            $mansection = '3';
+            $mansectionname = 'FUNCTIONS';
+        } elsif (($symtype >= 3) && ($symtype <= 5)) {  # struct/union/enum/typedef
+            $mansection = '3type';
+            $mansectionname = 'DATATYPES';
+        } else {
+            die("Unexpected symtype $symtype");
+        }
+
+        my $brief = $sectionsref->{'[Brief]'};
+        my $decl = $headerdecls{$sym};
+        my $str = '';
+
+        # the "$brief" makes sure this is a copy of the string, which is doing some weird reference thing otherwise.
+        $brief = defined $brief ? "$brief" : '';
+        $brief =~ s/\A[\s\n]*\= .*? \=\s*?\n+//ms;
+        $brief =~ s/\A[\s\n]*\=\= .*? \=\=\s*?\n+//ms;
+        $brief =~ s/\A(.*?\.) /$1\n/;  # \brief should only be one sentence, delimited by a period+space. Split if necessary.
+        my @briefsplit = split /\n/, $brief;
+        $brief = shift @briefsplit;
+        $brief = dewikify($wikitype, $brief);
+
+        if (defined $remarks) {
+            $remarks = dewikify($wikitype, join("\n", @briefsplit) . $remarks);
+        }
+
+        $str .= $introtxt;
+
+        $str .= ".\\\" This manpage content is licensed under Creative Commons\n";
+        $str .= ".\\\"  Attribution 4.0 International (CC BY 4.0)\n";
+        $str .= ".\\\"   https://creativecommons.org/licenses/by/4.0/\n";
+        $str .= ".\\\" This manpage was generated from ${projectshortname}'s wiki page for $sym:\n";
+        $str .= ".\\\"   $wikiurl/$sym\n";
+        $str .= ".\\\" Generated with SDL/build-scripts/wikiheaders.pl\n";
+        $str .= ".\\\"  revision $gitrev\n" if $gitrev ne '';
+        $str .= ".\\\" Please report issues in this manpage's content at:\n";
+        $str .= ".\\\"   $bugreporturl\n";
+        $str .= ".\\\" Please report issues in the generation of this manpage from the wiki at:\n";
+        $str .= ".\\\"   https://github.com/libsdl-org/SDL/issues/new?title=Misgenerated%20manpage%20for%20$sym\n";  # !!! FIXME: if this becomes a problem for other projects, we'll generalize this.
+        $str .= ".\\\" $projectshortname can be found at $projecturl\n";
+
+        # Define a .URL macro. The "www.tmac" thing decides if we're using GNU roff (which has a .URL macro already), and if so, overrides the macro we just created.
+        # This wizadry is from https://web.archive.org/web/20060102165607/http://people.debian.org/~branden/talks/wtfm/wtfm.pdf
+        $str .= ".de URL\n";
+        $str .= '\\$2 \(laURL: \\$1 \(ra\\$3' . "\n";
+        $str .= "..\n";
+        $str .= '.if \n[.g] .mso www.tmac' . "\n";
+
+        $str .= ".TH $sym $mansection \"$projectshortname $fullversion\" \"$projectfullname\" \"$projectshortname$majorver $mansectionname\"\n";
+        $str .= ".SH NAME\n";
+
+        $str .= "$sym";
+        $str .= " \\- $brief" if (defined $brief);
+        $str .= "\n";
+
+        if (defined $deprecated) {
+            $str .= ".SH DEPRECATED\n";
+            $str .= dewikify($wikitype, $deprecated) . "\n";
+        }
+
+        my $incfile = $mainincludefname;
+        if (defined $headerfile) {
+            if($headerfile =~ /Defined in (.*)/) {
+                $incfile = $1;
+            }
+        }
+
+        $str .= ".SH SYNOPSIS\n";
+        $str .= ".nf\n";
+        $str .= ".B #include <$incfile>\n";
+        $str .= ".PP\n";
+
+        my @decllines = split /\n/, $decl;
+        foreach (@decllines) {
+            $_ =~ s/\\/\\(rs/g;  # fix multiline macro defs
+            $_ =~ s/"/\\(dq/g;
+            $str .= ".BI \"$_\n";
+        }
+        $str .= ".fi\n";
+
+        if (defined $remarks) {
+            $str .= ".SH DESCRIPTION\n";
+            $str .= $remarks . "\n";
+        }
+
+        if (defined $params) {
+            if (($symtype == 1) || ($symtype == 5)) {
+                $str .= ".SH FUNCTION PARAMETERS\n";
+            } elsif ($symtype == 2) {  # macro
+                $str .= ".SH MACRO PARAMETERS\n";
+            } elsif ($symtype == 3) {  # struct/union
+                $str .= ".SH FIELDS\n";
+            } elsif ($symtype == 4) {  # enum
+                $str .= ".SH VALUES\n";
+            } else {
+                die("Unexpected symtype $symtype");
+            }
+
+            my @lines = split /\n/, $params;
+            if ($wikitype eq 'mediawiki') {
+                die("Unexpected data parsing MediaWiki table") if (shift @lines ne '{|');  # Dump the '{|' start
+                while (scalar(@lines) >= 3) {
+                    my $c_datatype = shift @lines;
+                    my $name = shift @lines;
+                    my $desc = shift @lines;
+                    my $terminator;  # the '|-' or '|}' line.
+
+                    if (($desc eq '|-') or ($desc eq '|}') or (not $desc =~ /\A\|/)) {  # we seem to be out of cells, which means there was no datatype column on this one.
+                        $terminator = $desc;
+                        $desc = $name;
+                        $name = $c_datatype;
+                        $c_datatype = '';
+                    } else {
+                        $terminator = shift @lines;
+                    }
+
+                    last if ($terminator ne '|-') and ($terminator ne '|}');  # we seem to have run out of table.
+                    $name =~ s/\A\|\s*//;
+                    $name =~ s/\A\*\*(.*?)\*\*/$1/;
+                    $name =~ s/\A\'\'\'(.*?)\'\'\'/$1/;
+                    $desc =~ s/\A\|\s*//;
+                    $desc = dewikify($wikitype, $desc);
+                    #print STDERR "SYM: $sym   CDATATYPE: $c_datatype  NAME: $name   DESC: $desc TERM: $terminator\n";
+
+                    $str .= ".TP\n";
+                    $str .= ".I $name\n";
+                    $str .= "$desc\n";
+                }
+            } elsif ($wikitype eq 'md') {
+                my $l;
+                $l = shift @lines;
+                die("Unexpected data parsing Markdown table") if (not $l =~ /\A(\s*\|)?\s*\|\s*\|\s*\|\s*\Z/);
+                $l = shift @lines;
+                die("Unexpected data parsing Markdown table") if (not $l =~ /\A\s*(\|\s*\-*\s*)?\|\s*\-*\s*\|\s*\-*\s*\|\s*\Z/);
+                while (scalar(@lines) >= 1) {
+                    $l = shift @lines;
+                    my $name;
+                    my $desc;
+                    if ($l =~ /\A\s*\|\s*(.*?)\s*\|\s*(.*?)\s*\|\s*(.*?)\s*\|\s*\Z/) {
+                        # c datatype is $1, but we don't care about it here.
+                        $name = $2;
+                        $desc = $3;
+                    } elsif ($l =~ /\A\s*\|\s*(.*?)\s*\|\s*(.*?)\s*\|\s*\Z/) {
+                        $name = $1;
+                        $desc = $2;
+                    } else {
+                        last;  # we seem to have run out of table.
+                    }
+
+                    $name =~ s/\A\*\*(.*?)\*\*/$1/;
+                    $name =~ s/\A\'\'\'(.*?)\'\'\'/$1/;
+                    $desc = dewikify($wikitype, $desc);
+
+                    $str .= ".TP\n";
+                    $str .= ".I $name\n";
+                    $str .= "$desc\n";
+                }
+            } else {
+                die("write me");
+            }
+        }
+
+        if (defined $returns) {
+            # Check for md link in return type: ([SDL_Renderer](SDL_Renderer) *)
+            # This would've prevented the next regex from working properly (it'd leave " *)")
+            $returns =~ s/\A\(\[.*?\]\((.*?)\)/\($1/ms;
+            # Chop datatype in parentheses off the front.
+            $returns =~ s/\A\(.*?\) //;
+
+            $returns = dewikify($wikitype, $returns);
+            $str .= ".SH RETURN VALUE\n";
+            $str .= "$returns\n";
+        }
+
+        if (defined $examples) {
+            $str .= ".SH CODE EXAMPLES\n";
+            $dewikify_manpage_code_indent = 0;
+            $str .= dewikify($wikitype, $examples) . "\n";
+            $dewikify_manpage_code_indent = 1;
+        }
+
+        if (defined $threadsafety) {
+            $str .= ".SH THREAD SAFETY\n";
+            $str .= dewikify($wikitype, $threadsafety) . "\n";
+        }
+
+        if (defined $version) {
+            $str .= ".SH AVAILABILITY\n";
+            $str .= dewikify($wikitype, $version) . "\n";
+        }
+
+        if (defined $related) {
+            $str .= ".SH SEE ALSO\n";
+            # !!! FIXME: lots of code duplication in all of these.
+            my $v = dewikify($wikitype, $related);
+            my @desclines = split /\n/, $v;
+            my $nextstr = '';
+            foreach (@desclines) {
+                s/\(\)\Z//;  # Convert "SDL_Func()" to "SDL_Func"
+                s/\[\[(.*?)\]\]/$1/;  # in case some wikilinks remain.
+                s/\[(.*?)\]\(.*?\)/$1/;  # in case some wikilinks remain.
+                s/\A\*\s*\Z//;
+                s/\A\/*//;
+                s/\A\.BR\s+//;  # dewikify added this, but we want to handle it.
+                s/\A\.I\s+//;  # dewikify added this, but we want to handle it.
+                s/\A\.PP\s*//;  # dewikify added this, but we want to handle it.
+                s/\\\(bu//;  # dewikify added this, but we want to handle it.
+                s/\A\s*[\:\*\-]\s*//;
+                s/\A\s+//;
+                s/\s+\Z//;
+                next if $_ eq '';
+                my $seealso_symtype = $headersymstype{$_};
+                my $seealso_mansection = '3';
+                if (defined($seealso_symtype) && ($seealso_symtype >= 3) && ($seealso_symtype <= 5)) {  # struct/union/enum/typedef
+                    $seealso_mansection = '3type';
+                }
+                $str .= "$nextstr.BR $_ ($seealso_mansection)";
+                $nextstr = ",\n";
+            }
+            $str .= "\n";
+        }
+
+        if (0) {
+        $str .= ".SH COPYRIGHT\n";
+        $str .= "This manpage is licensed under\n";
+        $str .= ".UR https://creativecommons.org/licenses/by/4.0/\n";
+        $str .= "Creative Commons Attribution 4.0 International (CC BY 4.0)\n";
+        $str .= ".UE\n";
+        $str .= ".PP\n";
+        $str .= "This manpage was generated from\n";
+        $str .= ".UR $wikiurl/$sym\n";
+        $str .= "${projectshortname}'s wiki\n";
+        $str .= ".UE\n";
+        $str .= "using SDL/build-scripts/wikiheaders.pl";
+        $str .= " revision $gitrev" if $gitrev ne '';
+        $str .= ".\n";
+        $str .= "Please report issues in this manpage at\n";
+        $str .= ".UR $bugreporturl\n";
+        $str .= "our bugtracker!\n";
+        $str .= ".UE\n";
+        }
+
+        my $path = "$manpath/man3/$_.$mansection";
+        my $tmppath = "$path.tmp";
+        open(FH, '>', $tmppath) or die("Can't open '$tmppath': $!\n");
+        print FH $str;
+        close(FH);
+        rename($tmppath, $path) or die("Can't rename '$tmppath' to '$path': $!\n");
+    }
+
+} elsif ($copy_direction == -4) { # --copy-to-latex
+    # This only takes from the wiki data, since it has sections we omit from the headers, like code examples.
+
+    print STDERR "\n(The --copy-to-latex code is known to not be ready for serious use; send patches, not bug reports, please.)\n\n";
+
+    $dewikify_mode = 'LaTeX';
+    $wordwrap_mode = 'LaTeX';
+
+    # !!! FIXME: code duplication with --copy-to-manpages section.
+
+    my $introtxt = '';
+    if (0) {
+    open(FH, '<', "$srcpath/LICENSE.txt") or die("Can't open '$srcpath/LICENSE.txt': $!\n");
+    while (<FH>) {
+        chomp;
+        $introtxt .= ".\\\" $_\n";
+    }
+    close(FH);
+    }
+
+    if (!$gitrev) {
+        $gitrev = `cd "$srcpath" ; git rev-list HEAD~..`;
+        chomp($gitrev);
+    }
+
+    # !!! FIXME
+    open(FH, '<', "$srcpath/$versionfname") or die("Can't open '$srcpath/$versionfname': $!\n");
+    my $majorver = 0;
+    my $minorver = 0;
+    my $microver = 0;
+    while (<FH>) {
+        chomp;
+        if (/$versionmajorregex/) {
+            $majorver = int($1);
+        } elsif (/$versionminorregex/) {
+            $minorver = int($1);
+        } elsif (/$versionmicroregex/) {
+            $microver = int($1);
+        }
+    }
+    close(FH);
+    my $fullversion = "$majorver.$minorver.$microver";
+
+    my $latex_fname = "$srcpath/$projectshortname.tex";
+    my $latex_tmpfname = "$latex_fname.tmp";
+    open(TEXFH, '>', "$latex_tmpfname") or die("Can't open '$latex_tmpfname' for writing: $!\n");
+
+    print TEXFH <<__EOF__
+\\documentclass{book}
+
+\\usepackage{listings}
+\\usepackage{color}
+\\usepackage{hyperref}
+
+\\definecolor{dkgreen}{rgb}{0,0.6,0}
+\\definecolor{gray}{rgb}{0.5,0.5,0.5}
+\\definecolor{mauve}{rgb}{0.58,0,0.82}
+
+\\setcounter{secnumdepth}{0}
+
+\\lstset{frame=tb,
+  language=C,
+  aboveskip=3mm,
+  belowskip=3mm,
+  showstringspaces=false,
+  columns=flexible,
+  basicstyle={\\small\\ttfamily},
+  numbers=none,
+  numberstyle=\\tiny\\color{gray},
+  keywordstyle=\\color{blue},
+  commentstyle=\\color{dkgreen},
+  stringstyle=\\color{mauve},
+  breaklines=true,
+  breakatwhitespace=true,
+  tabsize=3
+}
+
+\\begin{document}
+\\frontmatter
+
+\\title{$projectfullname $majorver.$minorver.$microver Reference Manual}
+\\author{The $projectshortname Developers}
+\\maketitle
+
+\\mainmatter
+
+__EOF__
+;
+
+    # !!! FIXME: Maybe put this in the book intro?  print TEXFH $introtxt;
+
+    # Sort symbols by symbol type, then alphabetically.
+    my @headersymskeys = sort {
+        my $symtypea = $headersymstype{$a};
+        my $symtypeb = $headersymstype{$b};
+        $symtypea = 3 if ($symtypea > 3);
+        $symtypeb = 3 if ($symtypeb > 3);
+        my $rc = $symtypea <=> $symtypeb;
+        if ($rc == 0) {
+            $rc = lc($a) cmp lc($b);
+        }
+        return $rc;
+    } keys %headersyms;
+
+    my $current_symtype = 0;
+    my $current_chapter = '';
+
+    foreach (@headersymskeys) {
+        my $sym = $_;
+        next if not defined $wikisyms{$sym};  # don't have a page for that function, skip it.
+        next if $sym =~ /\A\[category documentation\]/;   # not real symbols.
+        my $symtype = $headersymstype{$sym};
+        my $wikitype = $wikitypes{$sym};
+        my $sectionsref = $wikisyms{$sym};
+        my $remarks = $sectionsref->{'Remarks'};
+        my $params = $sectionsref->{'Function Parameters'};
+        my $returns = $sectionsref->{'Return Value'};
+        my $version = $sectionsref->{'Version'};
+        my $threadsafety = $sectionsref->{'Thread Safety'};
+        my $related = $sectionsref->{'See Also'};
+        my $examples = $sectionsref->{'Code Examples'};
+        my $deprecated = $sectionsref->{'Deprecated'};
+        my $headerfile = $manpageheaderfiletext;
+        $headerfile =~ s/\%fname\%/$headersymslocation{$sym}/g;
+        $headerfile .= "\n";
+
+        my $brief = $sectionsref->{'[Brief]'};
+        my $decl = $headerdecls{$sym};
+        my $str = '';
+
+        if ($current_symtype != $symtype) {
+            my $newchapter = '';
+            if ($symtype == 1) {
+                $newchapter = 'Functions';
+            } elsif ($symtype == 2) {
+                $newchapter = 'Macros';
+            } else {
+                $newchapter = 'Datatypes';
+            }
+
+            if ($current_chapter ne $newchapter) {
+                $str .= "\n\n\\chapter{$projectshortname $newchapter}\n\n\\clearpage\n\n";
+                $current_chapter = $newchapter;
+            }
+            $current_symtype = $symtype;
+        }
+
+        $brief = "$brief";
+        $brief =~ s/\A[\s\n]*\= .*? \=\s*?\n+//ms;
+        $brief =~ s/\A[\s\n]*\=\= .*? \=\=\s*?\n+//ms;
+        $brief =~ s/\A(.*?\.) /$1\n/;  # \brief should only be one sentence, delimited by a period+space. Split if necessary.
+        my @briefsplit = split /\n/, $brief;
+        $brief = shift @briefsplit;
+        $brief = dewikify($wikitype, $brief);
+
+        if (defined $remarks) {
+            $remarks = dewikify($wikitype, join("\n", @briefsplit) . $remarks);
+        }
+
+        my $escapedsym = escLaTeX($sym);
+        $str .= "\\hypertarget{$sym}{%\n\\section{$escapedsym}\\label{$sym}}\n\n";
+        $str .= $brief if (defined $brief);
+        $str .= "\n\n";
+
+        if (defined $deprecated) {
+            $str .= "\\subsection{Deprecated}\n\n";
+            $str .= dewikify($wikitype, $deprecated) . "\n";
+        }
+
+        if (defined $headerfile) {
+            $str .= "\\subsection{Header File}\n\n";
+            $str .= dewikify($wikitype, $headerfile) . "\n";
+        }
+
+        $str .= "\\subsection{Syntax}\n\n";
+        $str .= "\\begin{lstlisting}\n$decl\n\\end{lstlisting}\n";
+
+        if (defined $params) {
+            if (($symtype == 1) || ($symtype == 5)) {
+                $str .= "\\subsection{Function Parameters}\n\n";
+            } elsif ($symtype == 2) {  # macro
+                $str .= "\\subsection{Macro Parameters}\n\n";
+            } elsif ($symtype == 3) {  # struct/union
+                $str .= "\\subsection{Fields}\n\n";
+            } elsif ($symtype == 4) {  # enum
+                $str .= "\\subsection{Values}\n\n";
+            } else {
+                die("Unexpected symtype $symtype");
+            }
+
+            $str .= "\\begin{center}\n";
+            $str .= "    \\begin{tabular}{ | l | p{0.75\\textwidth} |}\n";
+            $str .= "    \\hline\n";
+
+            # !!! FIXME: this table parsing has gotten complicated and is pasted three times in this file; move it to a subroutine!
+            my @lines = split /\n/, $params;
+            if ($wikitype eq 'mediawiki') {
+                die("Unexpected data parsing MediaWiki table") if (shift @lines ne '{|');  # Dump the '{|' start
+                while (scalar(@lines) >= 3) {
+                    my $name = shift @lines;
+                    my $desc = shift @lines;
+                    my $terminator = shift @lines;  # the '|-' or '|}' line.
+                    last if ($terminator ne '|-') and ($terminator ne '|}');  # we seem to have run out of table.
+                    $name =~ s/\A\|\s*//;
+                    $name =~ s/\A\*\*(.*?)\*\*/$1/;
+                    $name =~ s/\A\'\'\'(.*?)\'\'\'/$1/;
+                    $name = escLaTeX($name);
+                    $desc =~ s/\A\|\s*//;
+                    $desc = dewikify($wikitype, $desc);
+                    #print STDERR "FN: $sym   NAME: $name   DESC: $desc TERM: $terminator\n";
+                    $str .= "    \\textbf{$name} & $desc \\\\ \\hline\n";
+                }
+            } elsif ($wikitype eq 'md') {
+                my $l;
+                $l = shift @lines;
+                die("Unexpected data parsing Markdown table") if (not $l =~ /\A(\s*\|)?\s*\|\s*\|\s*\|\s*\Z/);
+                $l = shift @lines;
+                die("Unexpected data parsing Markdown table") if (not $l =~ /\A\s*(\|\s*\-*\s*)?\|\s*\-*\s*\|\s*\-*\s*\|\s*\Z/);
+                while (scalar(@lines) >= 1) {
+                    $l = shift @lines;
+                    my $name;
+                    my $desc;
+                    if ($l =~ /\A\s*\|\s*(.*?)\s*\|\s*(.*?)\s*\|\s*(.*?)\s*\|\s*\Z/) {
+                        # c datatype is $1, but we don't care about it here.
+                        $name = $2;
+                        $desc = $3;
+                    } elsif ($l =~ /\A\s*\|\s*(.*?)\s*\|\s*(.*?)\s*\|\s*\Z/) {
+                        $name = $1;
+                        $desc = $2;
+                    } else {
+                        last;  # we seem to have run out of table.
+                    }
+
+                    $name =~ s/\A\*\*(.*?)\*\*/$1/;
+                    $name =~ s/\A\'\'\'(.*?)\'\'\'/$1/;
+                    $name = escLaTeX($name);
+                    $desc = dewikify($wikitype, $desc);
+                    $str .= "    \\textbf{$name} & $desc \\\\ \\hline\n";
+                }
+            } else {
+                die("write me");
+            }
+
+            $str .= "    \\end{tabular}\n";
+            $str .= "\\end{center}\n";
+        }
+
+        if (defined $returns) {
+            $returns = dewikify($wikitype, $returns);
+            $returns =~ s/\A\(.*?\)\s*//;  # Chop datatype in parentheses off the front.
+            $str .= "\\subsection{Return Value}\n\n";
+            $str .= "$returns\n";
+        }
+
+        if (defined $remarks) {
+            $str .= "\\subsection{Remarks}\n\n";
+            $str .= $remarks . "\n";
+        }
+
+        if (defined $examples) {
+            $str .= "\\subsection{Code Examples}\n\n";
+            $dewikify_manpage_code_indent = 0;
+            $str .= dewikify($wikitype, $examples) . "\n";
+            $dewikify_manpage_code_indent = 1;
+        }
+
+        if (defined $threadsafety) {
+            $str .= "\\subsection{Thread Safety}\n\n";
+            $str .= dewikify($wikitype, $threadsafety) . "\n";
+        }
+
+        if (defined $version) {
+            $str .= "\\subsection{Version}\n\n";
+            $str .= dewikify($wikitype, $version) . "\n";
+        }
+
+        if (defined $related) {
+            $str .= "\\subsection{See Also}\n\n";
+            $str .= "\\begin{itemize}\n";
+            # !!! FIXME: lots of code duplication in all of these.
+            my $v = dewikify($wikitype, $related);
+            my @desclines = split /\n/, $v;
+            my $nextstr = '';
+            foreach (@desclines) {
+                s/\(\)\Z//;  # Convert "SDL_Func()" to "SDL_Func"
+                s/\[\[(.*?)\]\]/$1/;  # in case some wikilinks remain.
+                s/\[(.*?)\]\(.*?\)/$1/;  # in case some wikilinks remain.
+                s/\A\*\s*\Z//;
+                s/\A\s*\\item\s*//;
+                s/\A\/*//;
+                s/\A\s*[\:\*\-]\s*//;
+                s/\A\s+//;
+                s/\s+\Z//;
+                next if $_ eq '';
+                next if $_ eq '\begin{itemize}';
+                next if $_ eq '\end{itemize}';
+                $str .= "    \\item $_\n";
+            }
+            $str .= "\\end{itemize}\n";
+            $str .= "\n";
+        }
+
+        # !!! FIXME: Maybe put copyright in the book intro?
+        if (0) {
+        $str .= ".SH COPYRIGHT\n";
+        $str .= "This manpage is licensed under\n";
+        $str .= ".UR https://creativecommons.org/licenses/by/4.0/\n";
+        $str .= "Creative Commons Attribution 4.0 International (CC BY 4.0)\n";
+        $str .= ".UE\n";
+        $str .= ".PP\n";
+        $str .= "This manpage was generated from\n";
+        $str .= ".UR $wikiurl/$sym\n";
+        $str .= "${projectshortname}'s wiki\n";
+        $str .= ".UE\n";
+        $str .= "using SDL/build-scripts/wikiheaders.pl";
+        $str .= " revision $gitrev" if $gitrev ne '';
+        $str .= ".\n";
+        $str .= "Please report issues in this manpage at\n";
+        $str .= ".UR $bugreporturl\n";
+        $str .= "our bugtracker!\n";
+        $str .= ".UE\n";
+        }
+
+        $str .= "\\clearpage\n\n";
+
+        print TEXFH $str;
+    }
+
+    print TEXFH "\\end{document}\n\n";
+    close(TEXFH);
+    rename($latex_tmpfname, $latex_fname) or die("Can't rename '$latex_tmpfname' to '$latex_fname': $!\n");
+
+} elsif ($copy_direction == -3) { # --report-coverage-gaps
+    foreach (@coverage_gap) {
+        print("$_\n");
+    }
+}
+
+# end of wikiheaders.pl ...
+