/usr/lib/pkgconfig/lldpctl.pc is in liblldpctl-dev 0.7.11-2+deb8u1.
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 | Name: lldpctl
Description: Library to interface with lldpd, a 802.1AB daemon
Version: 0.7.11
URL: http://vincentbernat.github.io/lldpd/
Libs: -L/usr/lib -llldpctl
Cflags: -I/usr/include
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