/usr/lib/x86_64-linux-gnu/pkgconfig/manette-0.2.pc is in libmanette-0.2-dev 0.2.0-1.
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 | prefix=/usr
libdir=${prefix}/lib/x86_64-linux-gnu
includedir=${prefix}/include
Name: libmanette
Description: A simple GObject game controller library
Version: 0.2.0
Requires: glib-2.0
Libs: -L${libdir} -lmanette-0.2
Cflags: -I${includedir}/libmanette
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