/usr/lib/x86_64-linux-gnu/pkgconfig/gnuradio-video-sdl.pc is in gnuradio-dev 3.7.9.1-2ubuntu1.
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=${prefix}
libdir=${exec_prefix}/lib/x86_64-linux-gnu
includedir=${prefix}/include
Name: gnuradio-video-sdl
Description: GNU Radio blocks for the SDL library
Requires: gnuradio-runtime sdl
Version: 3.7.9
Libs: -L${libdir} -lgnuradio-video-sdl
Cflags: -I${includedir}
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