cmake: Include "-pthread" in the pkg-config file if using pthreads #832
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This makes sure that users of the library pass the right linker flags if linking libflac statically, with a mingw toolchain that doesn't automatically link in pthreads.
ePirat
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May 6, 2025
This fixes linking with llvm-mingw (or any mingw distribution that doesn't default to linking in winpthreads). This wasn't noticed in the upstream VLC CI, as it builds with extras/packages/win32/build.sh, which passes in -Wl,-l:libpthread.a in VLC_LDFLAGS (in order to prefer linking winpthreads statically, rather than dynamically, for libraries that do use winpthreads). This patch has been sent upstream in xiph/flac#832.
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This makes sure that users of the library pass the right linker flags if linking libflac statically, with a mingw toolchain that doesn't automatically link in pthreads.