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main: Indented SDL_main headers for readability, removed SDL2 compat macros.

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Specifically, SDL_WinRTRunApp, SDL_UIKitRunApp, and SDL_GDKRunApp macros were
removed, as likely unnecessary to SDL3 users. A note was added to the
migration doc about how to roll replacements. These are not going into
SDL_oldnames.h.

Fixes #8245.
This commit is contained in:
Ryan C. Gordon
2024-01-25 17:39:38 -05:00
parent 22ea59425d
commit 8814095aa8
3 changed files with 236 additions and 250 deletions
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10
docs/README-migration.md
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@@ -861,7 +861,15 @@ SDL3 doesn't have a static libSDLmain to link against anymore.
Instead SDL_main.h is now a header-only library **and not included by SDL.h anymore**.
Using it is really simple: Just `#include <SDL3/SDL_main.h>` in the source file with your standard
`int main(int argc, char* argv[])` function.
`int main(int argc, char* argv[])` function. See docs/README-main-functions.md for details.
Several platform-specific entry point functions have been removed as unnecessary. If for some reason you explicitly need them, here are easy replacements:
```c
#define SDL_WinRTRunApp(MAIN_FUNC, RESERVED) SDL_RunApp(0, NULL, MAIN_FUNC, RESERVED)
#define SDL_UIKitRunApp(ARGC, ARGV, MAIN_FUNC) SDL_RunApp(ARGC, ARGV, MAIN_FUNC, NULL)
#define SDL_GDKRunApp(MAIN_FUNC, RESERVED) SDL_RunApp(0, NULL, MAIN_FUNC, RESERVED)
```
## SDL_metal.h