/usr/lib/x86_64-linux-gnu/pkgconfig/libpulse.pc is in libpulse-dev 1:1.1-0ubuntu15.
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 | prefix=/usr
exec_prefix=${prefix}
libdir=${prefix}/lib/x86_64-linux-gnu
includedir=${prefix}/include
modlibexecdir=${prefix}/lib/pulse-1.1/modules
Name: libpulse
Description: PulseAudio Client Interface
Version: 1.1
Libs: -L${libdir} -lpulse
Libs.private: -lpulsecommon-1.1
Cflags: -I${includedir} -D_REENTRANT
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