/usr/lib/pkgconfig/do.interface.linux.pc is in gnome-do 0.95.3-5.
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: Do.Interface.Linux
Description: GTK+ Interface module for Do
Version: 0.11
Requires: do.platform do.universe
Libs: -r:/usr/lib/gnome-do/Do.Interface.Linux.dll
|