/usr/lib/pkgconfig/vbr.pc is in libvbr-dev 2.11.0~alpha-10+deb9u1.
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 | # Process this file with autoconf to produce a pkg-config metadata file.
prefix=/usr
exec_prefix=${prefix}
libdir=${exec_prefix}/lib
includedir=${prefix}/include
Name: VBR (Vouch by reference library)
Description: Library for assisting in Vouch By Refence functions
URL: http://opendkim.org
Version: 2.11.0
Libs: -L${libdir} -lvbr
Libs.private: -lresolv
Cflags: -I${includedir}
|