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When cross-compiling, pkg.m4 will set the PKG_CONFIG variable to a suitable pkg-config executable, which might be a host-architecture-prefixed name like aarch64-linux-gnu-pkg-config. This ensures that we will use a suitable search path that is suitable for the host architecture (the machine we are compiling for) rather than the build architecture (the machine we are compiling on) to find dependency libraries like SDL. When using pkg-config as a substitute for sdl2-config, we will similarly need to use the host-architecture-prefixed pkg-config. Setting the PKG_CONFIG environment variable is also the canonical way to request that a different pkg-config implementation be used, if that becomes necessary for some reason. Co-authored-by: Helmut Grohne <helmut@subdivi.de> Bug-Debian: https://bugs.debian.org/1059749 Signed-off-by: Simon McVittie <smcv@collabora.com>
Simple DirectMedia Layer (SDL) Version 2.0
Simple DirectMedia Layer is a cross-platform development library designed to provide low level access to audio, keyboard, mouse, joystick, and graphics hardware via OpenGL and Direct3D. It is used by video playback software, emulators, and popular games including Valve's award winning catalog and many Humble Bundle games.
More extensive documentation is available in the docs directory, starting with README.md
Enjoy!
Sam Lantinga (slouken@libsdl.org)