Platform: silence clang-cl warnings from internal SDL headers.

src/Magnum/Platform/Sdl2Application.cpp

@@ -26,7 +26,17 @@
 #include "Sdl2Application.h"
 
 #include <cstring>
+#ifdef CORRADE_TARGET_CLANG_CL
+/* SDL does #pragma pack(push,8) and #pragma pack(pop,8) in different headers
+   (begin_code.h and end_code.h) and clang-cl doesn't like that, even though it
+   is completely fine. Silence the warning. */
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wpragma-pack"
+#endif
 #include <SDL.h>
+#ifdef CORRADE_TARGET_CLANG_CL
+#pragma clang diagnostic pop
+#endif
 #ifndef CORRADE_TARGET_EMSCRIPTEN
 #include <tuple>
 #else

src/Magnum/Platform/Sdl2Application.h

@@ -46,6 +46,14 @@
 #ifdef CORRADE_TARGET_WINDOWS /* Windows version of SDL2 redefines main(), we don't want that */
 #define SDL_MAIN_HANDLED
 #endif
+
+#ifdef CORRADE_TARGET_CLANG_CL
+/* SDL does #pragma pack(push,8) and #pragma pack(pop,8) in different headers
+   (begin_code.h and end_code.h) and clang-cl doesn't like that, even though it
+   is completely fine. Silence the warning. */
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wpragma-pack"
+#endif
 /* SDL.h includes the world, adding 50k LOC. We don't want that either. */
 #include <SDL_keycode.h>
 #include <SDL_mouse.h>
@@ -57,6 +65,9 @@
 #include <SDL_main.h> /* For SDL_WinRTRunApp */
 #include <wrl.h> /* For the WinMain entrypoint */
 #endif
+#ifdef CORRADE_TARGET_CLANG_CL
+#pragma clang diagnostic pop
+#endif
 
 #ifndef DOXYGEN_GENERATING_OUTPUT
 union SDL_Event; /* for anyEvent() */

src/Magnum/Platform/Test/Sdl2ApplicationTest.cpp

@@ -33,7 +33,17 @@
 #include "Magnum/Trade/AbstractImporter.h"
 #include "Magnum/Trade/ImageData.h"
 
+#ifdef CORRADE_TARGET_CLANG_CL
+/* SDL does #pragma pack(push,8) and #pragma pack(pop,8) in different headers
+   (begin_code.h and end_code.h) and clang-cl doesn't like that, even though it
+   is completely fine. Silence the warning. */
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wpragma-pack"
+#endif
 #include <SDL_events.h>
+#ifdef CORRADE_TARGET_CLANG_CL
+#pragma clang diagnostic pop
+#endif
 
 namespace Magnum { namespace Platform { namespace Test { namespace {