/usr/lib/x86_64-linux-gnu/pkgconfig/mirclientcpp.pc is in libmirclient-dev 0.31.1-0ubuntu1.
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 | includedir=/usr/include/mirclient
Name: mirclientcpp
Description: C++ wrapper for mirclient
Version: 2.0.0
Requires: mirclient
Cflags: -I${includedir}
|