Allow C++ code to include SDL_android.h

Alexey Petruchik

Although SDL_android.h is not intended to be included by client code sometimes it needed. For example you need JNIEnv pointer to make JNI calls to modified SDLActivity.java (video playback, facebook integration, in-apps). It seems a bit weird to write:

extern "C" {
#include "SDL_android.h"
}

in my AndroidJNI.cpp file.

src/core/android/SDL_android.h

@@ -20,6 +20,13 @@
 */
 #include "SDL_config.h"
 
+/* Set up for C function definitions, even when using C++ */
+#ifdef __cplusplus
+/* *INDENT-OFF* */
+extern "C" {
+/* *INDENT-ON* */
+#endif
+
 #include "SDL_rect.h"
 
 /* Interface from the SDL library into the Android Java activity */
@@ -61,4 +68,11 @@ int Android_JNI_SetupThread(void);
 /* Generic messages */
 int Android_JNI_SendMessage(int command, int param);
 
+/* Ends C function definitions when using C++ */
+#ifdef __cplusplus
+/* *INDENT-OFF* */
+}
+/* *INDENT-ON* */
+#endif
+
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