This is a list of major changes in SDL's version history.

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3.2.0:
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General:
* M_PI is no longer defined in SDL_stdinc.h, now the symbols SDL_M_PIl (double) and SDL_M_PIf (float) are available
* SDL_GetWindowWMInfo() returns a standard int result code instead of SDL_bool, and takes SDL_SYSWM_CURRENT_VERSION as a new third parameter
* SDL_RWFromFP has been removed from the API