/usr/lib/x86_64-linux-gnu/pkgconfig/libgringotts.pc is in libgringotts-dev 1:1.2.1-16.
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 | # pkgconfig file for libGringotts
prefix=/usr
libdir=${prefix}/lib/x86_64-linux-gnu
includedir=${prefix}/include
Name: libGringotts
Description: Library for strong encoding of any data
Version: 1.2.1
Libs: -L${libdir} -lgringotts
Cflags: -I${includedir}
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