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171885010d
SDL has been building on GNU/Hurd for a long time, using either drivers based on external libraries (e.g. X11, pulseaudio, sndio, etc) or dummy drivers. This commit introduces it explicitly as platform, so it can be recognized, and tweaked as needed. In particular: - introduce the SDL_PLATFORM_HURD define - tighten/improve the platform detection in cmake, and use "Hurd" as identifier - return the platform name in SDL_GetPlatform() - tweak the CFLAGS/LDFLAGS so pthreads can be used properly - implement SDL_GetExeName(), using /proc/self/exe as provided by the basic Linux-like procfs - enable GLES 2 in tests (mostly for consistency with Linux)