/usr/lib/x86_64-linux-gnu/pkgconfig/lqr-1.pc is in liblqr-1-0-dev 0.4.1-2ubuntu1.
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=${prefix}
libdir=/usr/lib/x86_64-linux-gnu
includedir=${prefix}/include
Name: lqr-1
Description: LiquidRescale seam-carving library
Requires: glib-2.0
Version: 0.4.1
Libs: -llqr-1
Cflags: -I${includedir}/lqr-1
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