posix

Merge pull request #120 from mattip/pkgconfig2 #68

Job	Run time
build (ubuntu-latest, i686, 0, 2014)	16m 41s
build (ubuntu-latest, x86_64, 0, 2014)	19m 25s
build (ubuntu-latest, x86_64, 1, 2014)	19m 46s
build (macos-11, x86_64, 0, 2014)	30m 42s
build (macos-11, x86_64, 1, 2014)	31m 5s
build (macos-11, arm64, 1)	22m 9s
build (macos-11, arm64, 0)	23m 49s
build (ubuntu-latest, x86_64, 1, _1_1, musllinux)	23m 26s
build (ubuntu-latest, x86_64, 0, _1_1, musllinux)	20m 12s
	3h 27m 15s

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