Still more compiler warning fixes for various platforms.

src/SDL_error.c

@@ -177,9 +177,11 @@ main(int argc, char *argv[])
 /* keep this at the end of the file so it works with GCC builds that don't
    support "#pragma GCC diagnostic push" ... we'll just leave the warning
    disabled after this. */
-#ifdef __GNUC__
+/* this pragma arrived in GCC 4.2 and causes a warning on older GCCs! Sigh. */
+#if defined(__clang__) || (defined(__GNUC__) && ((__GNUC__ > 4) || (__GNUC__ == 4 && (__GNUC_MINOR__ >= 2))))
 #pragma GCC diagnostic ignored "-Wformat-nonliteral"
 #endif
+
 /* This function has a bit more overhead than most error functions
    so that it supports internationalization and thread-safe errors.
 */

src/stdlib/SDL_iconv.c

@@ -38,6 +38,7 @@
    If we get this wrong, it's just a warning, so no big deal.
 */
 #if defined(_XGP6) || defined(__APPLE__) || \
+    defined(__EMSCRIPTEN__) || \
     (defined(__GLIBC__) && ((__GLIBC__ > 2) || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2)) || \
     (defined(_NEWLIB_VERSION)))
 #define ICONV_INBUF_NONCONST

src/test/SDL_test_common.c

@@ -1210,10 +1210,10 @@ SDLTest_PrintEvent(SDL_Event * event)
                 event->tfinger.dx, event->tfinger.dy, event->tfinger.pressure);
         break;
     case SDL_DOLLARGESTURE:
-        SDL_Log("SDL_EVENT: Dollar gesture detect: %lld", (long long) event->dgesture.gestureId);
+        SDL_Log("SDL_EVENT: Dollar gesture detect: %ld", (long) event->dgesture.gestureId);
         break;
     case SDL_DOLLARRECORD:
-        SDL_Log("SDL_EVENT: Dollar gesture record: %lld", (long long) event->dgesture.gestureId);
+        SDL_Log("SDL_EVENT: Dollar gesture record: %ld", (long) event->dgesture.gestureId);
         break;
     case SDL_MULTIGESTURE:
         SDL_Log("SDL_EVENT: Multi gesture fingers: %d", event->mgesture.numFingers);

src/video/emscripten/SDL_emscriptenopengles.c

@@ -39,11 +39,15 @@ Emscripten_GLES_LoadLibrary(_THIS, const char *path) {
     if (!_this->egl_data) {
         return SDL_OutOfMemory();
     }
-    
+
+    /* Emscripten forces you to manually cast eglGetProcAddress to the real
+       function type; grep for "__eglMustCastToProperFunctionPointerType" in
+       Emscripten's egl.h for details. */
+    _this->egl_data->eglGetProcAddress = (void *(EGLAPIENTRY *)(const char *)) eglGetProcAddress;
+
     LOAD_FUNC(eglGetDisplay);
     LOAD_FUNC(eglInitialize);
     LOAD_FUNC(eglTerminate);
-    LOAD_FUNC(eglGetProcAddress);
     LOAD_FUNC(eglChooseConfig);
     LOAD_FUNC(eglGetConfigAttrib);
     LOAD_FUNC(eglCreateContext);