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libsdl-org / sdl12-compat

An SDL-1.2 compatibility layer that uses SDL 2.0 behind the scenes.
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sdl.m4: Call $PKG_CONFIG rather than hard-coding pkg-config #326

Closed smcv closed 10 months ago

smcv commented 10 months ago

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.

Bug-Debian: https://bugs.debian.org/1059749

smcv commented 10 months ago

This sdl.m4 could also be copied into https://github.com/libsdl-org/SDL-1.2 if desired.

smcv commented 10 months ago

Based on a patch from @helmutg.