/usr/lib/x86_64-linux-gnu/pkgconfig/libisoburn-1.pc is in libisoburn-dev 1.4.2-4ubuntu1.
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=${prefix}/include
Name: libisoburn
Description: Multi-session filesystem extension to libisofs, libburn.
Version: 1.4.2
Requires:
Libs: -L${libdir} -lisoburn
Cflags: -I${includedir}/libisoburn
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