Man page - sdl_big_endian(3)

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SDL_BIG_ENDIAN - A value to represent bigendian byteorder.

Defined in SDL3/SDL_endian.h

#include "SDL3/SDL.h"

#define SDL_BIG_ENDIAN 4321

This is used with the preprocessor macro SDL_BYTEORDER , to determine a platform’s byte ordering:

#if SDL_BYTEORDER == SDL_BIG_ENDIAN
SDL_Log("This system is bigendian.");
#endif

This macro is available since SDL 3.2.0.