Add get_proc_address to OSX/iOS.

apple/RetroArch/RAGameView.m

@@ -273,6 +273,20 @@ void apple_get_game_view_size(unsigned *width, unsigned *height)
    *height = *height ? *height : 480;
 }
 
+void *apple_get_proc_address(const char *symbol_name)
+{
+#ifdef IOS
+   (void)symbol_name; // We don't need symbols above GLES2 on iOS.
+   return NULL;
+#else
+   CFStringRef symbol = CFStringCreateWithCString(kCFAllocatorDefault, symbol_name, kCFStringEncodingASCII);
+   void *proc = CFBundleGetFunctionPointerForName(CFBundleGetBundleWithIdentifier(CFSTR("com.apple.opengl")),
+      symbol);
+   CFRelease(symbol);
+   return proc;
+#endif
+}
+
 #ifdef IOS
 void apple_bind_game_view_fbo(void)
 {

apple/RetroArch/RetroArch_Apple.h

@@ -18,6 +18,7 @@
 #define __RARCH_APPLE_H
 
 #include <Foundation/Foundation.h>
+#import <CoreFoundation/CoreFoundation.h>
 #import "RAModuleInfo.h"
 
 void apple_run_core(RAModuleInfo* core, const char* file);

apple/RetroArch/rarch_wrapper.h

@@ -29,6 +29,7 @@ void apple_destroy_game_view(void);
 void apple_flip_game_view(void);
 void apple_set_game_view_sync(unsigned interval);
 void apple_get_game_view_size(unsigned *width, unsigned *height);
+void *apple_get_proc_address(const char *symbol_name);
 
 #ifdef IOS
 void apple_bind_game_view_fbo(void);

gfx/context/apple_gl_ctx.c

@@ -93,6 +93,11 @@ static void gfx_ctx_input_driver(const input_driver_t **input, void **input_data
    *input_data = NULL;
 }
 
+static gfx_ctx_proc_t gfx_ctx_get_proc_address(const char *symbol_name)
+{
+   return (gfx_ctx_proc_t)apple_get_proc_address(symbol_name);
+}
+
 // The apple_* functions are implemented in apple/RetroArch/RAGameView.m
 
 const gfx_ctx_driver_t gfx_ctx_apple = {
@@ -109,7 +114,7 @@ const gfx_ctx_driver_t gfx_ctx_apple = {
    gfx_ctx_has_focus,
    apple_flip_game_view,
    gfx_ctx_input_driver,
-   NULL,
+   gfx_ctx_get_proc_address,
    NULL,
    "ios",
 };