/usr/lib/x86_64-linux-gnu/pkgconfig/libnetfilter_queue.pc is in libnetfilter-queue-dev 1.0.2-2.
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 13 14 15 16 | # libnetfilter_queue pkg-config file
prefix=/usr
exec_prefix=${prefix}
libdir=${prefix}/lib/x86_64-linux-gnu
includedir=${prefix}/include
Name: libnetfilter_queue
Description: netfilter userspace packet queueing library
URL: http://netfilter.org/projects/libnetfilter_queue/
Version: 1.0.2
Requires: libnfnetlink
Conflicts:
Libs: -L${libdir} -lnetfilter_queue
Libs.private: -lnfnetlink
Cflags: -I${includedir}
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