/usr/lib/x86_64-linux-gnu/pkgconfig/libgsf-1.pc is in libgsf-1-dev 1.14.36-1.
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 11 | prefix=/usr
exec_prefix=${prefix}
libdir=${prefix}/lib/x86_64-linux-gnu
includedir=${prefix}/include
Name: libgsf-1
Description: A library for reading and writing structured files (eg MS OLE and Zip)
Version: 1.14.36
Requires: glib-2.0 gobject-2.0 libxml-2.0
Libs: -L${libdir} -lgsf-1
Cflags: -I${includedir}/libgsf-1
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