Make sure code is only compiled if the appropriate subsystem is enabled

src/loadso/beos/SDL_sysloadso.c

@@ -21,6 +21,8 @@
 */
 #include "SDL_config.h"
 
+#ifdef SDL_LOADSO_BEOS
+
 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 /* System dependent library loading routines                           */
 
@@ -71,3 +73,4 @@ void SDL_UnloadObject(void *handle)
 	}
 }
 
+#endif /* SDL_LOADSO_BEOS */

src/loadso/dlopen/SDL_sysloadso.c

@@ -21,6 +21,8 @@
 */
 #include "SDL_config.h"
 
+#ifdef SDL_LOADSO_DLOPEN
+
 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 /* System dependent library loading routines                           */
 
@@ -63,3 +65,4 @@ void SDL_UnloadObject(void *handle)
 	}
 }
 
+#endif /* SDL_LOADSO_DLOPEN */

src/loadso/dummy/SDL_sysloadso.c

@@ -21,6 +21,8 @@
 */
 #include "SDL_config.h"
 
+#if defined(SDL_LOADSO_DUMMY) || defined(SDL_LOADSO_DISABLED)
+
 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 /* System dependent library loading routines                           */
 
@@ -45,3 +47,4 @@ void SDL_UnloadObject(void *handle)
     /* no-op. */
 }
 
+#endif /* SDL_LOADSO_DUMMY || SDL_LOADSO_DISABLED */

src/loadso/macos/SDL_sysloadso.c

@@ -21,6 +21,8 @@
 */
 #include "SDL_config.h"
 
+#ifdef SDL_LOADSO_MACOS
+
 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 /* System dependent library loading routines                           */
 
@@ -101,3 +103,4 @@ void SDL_UnloadObject(void *handle)
 	}
 }
 
+#endif /* SDL_LOADSO_MACOS */

src/loadso/macosx/SDL_sysloadso.c

@@ -21,6 +21,8 @@
 */
 #include "SDL_config.h"
 
+#ifdef SDL_LOADSO_DLCOMPAT
+
 /* Please note that dlcompat apparently ships in current Mac OS X versions
  *  as a system library that provides compatibility with the Unix "dlopen"
  *  interface. In order to allow SDL to work on older OS X releases and also
@@ -1399,3 +1401,4 @@ void SDL_UnloadObject(void *handle)
 	}
 }
 
+#endif /* SDL_LOADSO_DLCOMPAT */

src/loadso/mint/SDL_sysloadso.c

@@ -21,6 +21,8 @@
 */
 #include "SDL_config.h"
 
+#ifdef SDL_LOADSO_LDG
+
 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 /* System dependent library loading routines                           */
 
@@ -57,3 +59,4 @@ void SDL_UnloadObject(void *handle)
 	}
 }
 
+#endif /* SDL_LOADSO_LDG */

src/loadso/os2/SDL_sysloadso.c

@@ -21,6 +21,8 @@
 */
 #include "SDL_config.h"
 
+#ifdef SDL_LOADSO_OS2
+
 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 /* System dependent library loading routines                           */
 
@@ -66,3 +68,4 @@ void SDL_UnloadObject(void *handle)
         DosFreeModule((HMODULE) handle);
 }
 
+#endif /* SDL_LOADSO_OS2 */

src/loadso/win32/SDL_sysloadso.c

@@ -21,6 +21,8 @@
 */
 #include "SDL_config.h"
 
+#ifdef SDL_LOADSO_WIN32
+
 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 /* System dependent library loading routines                           */
 
@@ -134,3 +136,4 @@ void SDL_UnloadObject(void *handle)
 	}
 }
 
+#endif /* SDL_LOADSO_WIN32 */