/usr/lib/x86_64-linux-gnu/pkgconfig/libhackrf.pc is in libhackrf-dev 2018.01.1-2.
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 | prefix=/usr
exec_prefix=${prefix}
libdir=${exec_prefix}/lib/x86_64-linux-gnu
includedir=${prefix}/include
Name: HackRF Library
Description: C Utility Library
Version: 0.5
Cflags: -I${includedir}/ -I/usr/include/libusb-1.0
Libs: -L${libdir} -lhackrf
Libs.private:
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