/usr/lib/x86_64-linux-gnu/pkgconfig/globus-gsi-proxy-core.pc is in libglobus-gsi-proxy-core-dev 7.9-2.
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=${prefix}
libdir=${prefix}/lib/x86_64-linux-gnu
includedir=${prefix}/include/globus
Name: globus-gsi-proxy-core
Description: Globus Toolkit - Globus GSI Proxy Core Library
Version: 7.9
Requires.private: openssl >= 0.9.8, globus-common >= 14, globus-openssl-module >= 3, globus-gsi-openssl-error >= 2, globus-gsi-cert-utils >= 8, globus-gsi-sysconfig >= 5, globus-gsi-proxy-ssl >= 4, globus-gsi-credential >= 5
Libs: -L${libdir} -lglobus_gsi_proxy_core
Cflags: -I${includedir}
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