Support dynamic loading of SDL libraries

This is mainly to address old issue when one need to have SDL library installed
in order to use our official builds. Some hip distros already installs SDL,
but it's not quite the same across all the variety of the distros.

We also now switching to SDL-2.0, most of the distros have it in repositories
already, so it shouldn't be huge deal to install it if needed.

Reviewers: campbellbarton

Reviewed By: campbellbarton

Differential Revision: https://developer.blender.org/D878

1 files changed, 56 insertions, 0 deletions

diff --git a/extern/sdlew/include/SDL2/SDL_main.h b/extern/sdlew/include/SDL2/SDL_main.h
new file mode 100644
index 00000000000..9f7386af065
--- /dev/null
+++ b/extern/sdlew/include/SDL2/SDL_main.h
@@ -0,0 +1,56 @@
+
+#ifndef _SDL_main_h
+#define _SDL_main_h
+
+#include "SDL_stdinc.h"
+
+#ifndef SDL_MAIN_HANDLED
+#if defined(__WIN32__)
+
+#define SDL_MAIN_AVAILABLE
+
+#elif defined(__IPHONEOS__)
+
+#define SDL_MAIN_NEEDED
+
+#elif defined(__ANDROID__)
+
+#define SDL_MAIN_NEEDED
+
+#endif
+#endif
+
+#ifdef __cplusplus
+#define C_LINKAGE   "C"
+#else
+#define C_LINKAGE
+#endif
+
+#if defined(SDL_MAIN_NEEDED) || defined(SDL_MAIN_AVAILABLE)
+#define main    SDL_main
+#endif
+
+extern C_LINKAGE int SDL_main(int argc, char *argv[]);
+
+#include "begin_code.h"
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+extern DECLSPEC void SDL_SetMainReady(void);
+
+#ifdef __WIN32__
+
+typedef int SDLCALL tSDL_RegisterApp(char *name, Uint32 style,
+                                            void *hInst);
+typedef void SDLCALL tSDL_UnregisterApp(void);
+
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+#include "close_code.h"
+
+#endif
+