/usr/lib/x86_64-linux-gnu/pkgconfig/plank.pc is in libplank-dev 0.11.1-1.
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 | prefix=/usr
exec_prefix=${prefix}
libdir=${prefix}/lib/x86_64-linux-gnu
includedir=${prefix}/include
pkgdatadir=${prefix}/share/plank
Name: Plank
Description: Generic dock library of Plank
Version: 0.11.1
Requires: cairo gee-0.8 glib-2.0 gio-2.0 gobject-2.0 gthread-2.0 gdk-3.0 gdk-pixbuf-2.0 gtk+-3.0 libbamf3
Libs: -L${libdir} -lplank
Cflags: -I${includedir}/plank
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