Get rid of __inline__, just make sure "inline" is defined sanely instead.

src/physfs_byteorder.c

@@ -14,29 +14,21 @@
 #define __PHYSICSFS_INTERNAL__
 #include "physfs_internal.h"
 
-#if (defined macintosh) && !(defined __MWERKS__)
-#define __inline__
-#endif
-
-#if (defined _MSC_VER)
-#define __inline__ __inline
-#endif
-
 #ifndef PHYSFS_Swap16
-static __inline__ PHYSFS_uint16 PHYSFS_Swap16(PHYSFS_uint16 D)
+static inline PHYSFS_uint16 PHYSFS_Swap16(PHYSFS_uint16 D)
 {
     return ((D<<8)|(D>>8));
 }
 #endif
 #ifndef PHYSFS_Swap32
-static __inline__ PHYSFS_uint32 PHYSFS_Swap32(PHYSFS_uint32 D)
+static inline PHYSFS_uint32 PHYSFS_Swap32(PHYSFS_uint32 D)
 {
     return ((D<<24)|((D<<8)&0x00FF0000)|((D>>8)&0x0000FF00)|(D>>24));
 }
 #endif
 #ifndef PHYSFS_NO_64BIT_SUPPORT
 #ifndef PHYSFS_Swap64
-static __inline__ PHYSFS_uint64 PHYSFS_Swap64(PHYSFS_uint64 val) {
+static inline PHYSFS_uint64 PHYSFS_Swap64(PHYSFS_uint64 val) {
     PHYSFS_uint32 hi, lo;
 
     /* Separate into high and low 32-bit values and swap them */

src/physfs_internal.h

@@ -32,7 +32,6 @@
 /* !!! FIXME: if HAVE_ALLOCA_H would be good, too. */
 #if sun
 #include <alloca.h>
-#define __inline__ inline
 #endif
 
 #if defined(__sun) || defined(sun)
@@ -50,6 +49,14 @@ extern "C" {
 #define PHYSFS_MINIMUM_GCC_VERSION(major, minor) (0)
 #endif
 
+#ifdef __cplusplus
+    /* C++ always has a real inline keyword. */
+#elif (defined macintosh) && !(defined __MWERKS__)
+#   define inline
+#elif (defined _MSC_VER)
+#   define inline __inline
+#endif
+
 /*
  * Interface for small allocations. If you need a little scratch space for
  *  a throwaway buffer or string, use this. It will make small allocations