Fixed bug 3517 - Compiler warnings with gcc -Wstrict-prototypes

felix

Compiling even a simple SDL2 'hello world' program with gcc -Wstrict-prototypes (GCC 6.2.1) results in warnings like:

/usr/include/SDL2/SDL_gamecontroller.h:143:1: attention : function declaration isn't a prototype [-Wstrict-prototypes]
 extern DECLSPEC int SDLCALL SDL_GameControllerNumMappings();
 ^~~~~~

It seems there is a missing 'void' between the parentheses.

src/video/haiku/SDL_bkeyboard.cc

@@ -41,7 +41,7 @@ extern "C" {
 static SDL_Scancode keymap[KEYMAP_SIZE];
 static int8 keystate[KEYMAP_SIZE];
 
-void BE_InitOSKeymap() {
+void BE_InitOSKeymap(void) {
 		for( uint i = 0; i < SDL_TABLESIZE(keymap); ++i ) {
 			keymap[i] = SDL_SCANCODE_UNKNOWN;
 		}

src/video/haiku/SDL_bkeyboard.h

@@ -30,7 +30,7 @@ extern "C" {
 
 #include "../../../include/SDL_keyboard.h"
 
-extern void BE_InitOSKeymap();
+extern void BE_InitOSKeymap(void);
 extern SDL_Scancode BE_GetScancodeFromBeKey(int32 bkey);
 extern int8 BE_GetKeyState(int32 bkey);
 extern void BE_SetKeyState(int32 bkey, int8 state);

src/video/uikit/SDL_uikitmessagebox.h

@@ -22,7 +22,7 @@
 
 #if SDL_VIDEO_DRIVER_UIKIT
 
-extern SDL_bool UIKit_ShowingMessageBox();
+extern SDL_bool UIKit_ShowingMessageBox(void);
 
 extern int UIKit_ShowMessageBox(const SDL_MessageBoxData *messageboxdata, int *buttonid);
 

src/video/uikit/SDL_uikitmessagebox.m

@@ -31,7 +31,7 @@
 static SDL_bool s_showingMessageBox = SDL_FALSE;
 
 SDL_bool
-UIKit_ShowingMessageBox()
+UIKit_ShowingMessageBox(void)
 {
     return s_showingMessageBox;
 }

src/video/uikit/SDL_uikitopengles.h

@@ -33,7 +33,7 @@ extern void UIKit_GL_DeleteContext(_THIS, SDL_GLContext context);
 extern void *UIKit_GL_GetProcAddress(_THIS, const char *proc);
 extern int UIKit_GL_LoadLibrary(_THIS, const char *path);
 
-extern void UIKit_GL_RestoreCurrentContext();
+extern void UIKit_GL_RestoreCurrentContext(void);
 
 #endif
 

src/video/uikit/SDL_uikitopengles.m

@@ -228,7 +228,7 @@ UIKit_GL_DeleteContext(_THIS, SDL_GLContext context)
 }
 
 void
-UIKit_GL_RestoreCurrentContext()
+UIKit_GL_RestoreCurrentContext(void)
 {
     @autoreleasepool {
         /* Some iOS system functionality (such as Dictation on the on-screen

src/video/winrt/SDL_winrtevents.cpp

@@ -105,7 +105,7 @@ WINRT_XAMLThreadMain(void * userdata)
 }
 
 void
-WINRT_CycleXAMLThread()
+WINRT_CycleXAMLThread(void)
 {
     switch (_threadState) {
         case ThreadState_NotLaunched:

src/video/winrt/SDL_winrtevents_c.h

@@ -75,7 +75,7 @@ extern SDL_bool WINRT_IsScreenKeyboardShown(_THIS, SDL_Window *window);
 #endif  // NTDDI_VERSION >= ...
 
 /* XAML Thread Management */
-extern void WINRT_CycleXAMLThread();
+extern void WINRT_CycleXAMLThread(void);
 
 #endif // ifdef __cplusplus_winrt