/usr/lib/pkgconfig/telepathy-farstream.pc is in libtelepathy-farstream-dev 0.4.0-0ubuntu1.
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 8 9 10 11 | prefix=/usr
exec_prefix=${prefix}
libdir=${exec_prefix}/lib
includedir=${prefix}/include
Name: Telepathy-Farstream
Description: Library implementing the Telepathy Call API using Farstream
Version: 0.4.0
Requires.private: dbus-glib-1 >= 0.73, glib-2.0 >= 2.10, gobject-2.0 >= 2.10, farstream-0.1, telepathy-glib >= 0.7.23, gstreamer-0.10
Libs: -L${libdir} -ltelepathy-farstream
Cflags: -I${includedir}/telepathy-1.0
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