/usr/lib/x86_64-linux-gnu/pkgconfig/ao.pc is in libao-dev 1.2.2+20180113-1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 | # libao pkg-config source file
prefix=/usr
exec_prefix=${prefix}
libdir=${prefix}/lib/x86_64-linux-gnu
includedir=${prefix}/include
Name: ao
Description: ao is a cross-platform audio output library
Version: 1.2.2
Requires:
Conflicts:
Libs: -L${libdir} -lao
Libs.private: -lpthread -ldl
Cflags: -I${includedir}
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