/usr/lib/ is in gnunet-dev 0.9.3-7build1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/pkgconfig/
/usr/lib/pkgconfig/gnunetcore.pc
/usr/lib/pkgconfig/gnunetarm.pc
/usr/lib/pkgconfig/gnunethello.pc
/usr/lib/pkgconfig/gnunetfs.pc
/usr/lib/pkgconfig/gnunetdv.pc
/usr/lib/pkgconfig/gnunetdatacache.pc
/usr/lib/pkgconfig/gnunetdatastore.pc
/usr/lib/pkgconfig/gnunetstatistics.pc
/usr/lib/pkgconfig/gnunettesting.pc
/usr/lib/pkgconfig/gnunetnat.pc
/usr/lib/pkgconfig/gnunetpeerinfo.pc
/usr/lib/pkgconfig/gnunetutil.pc
/usr/lib/pkgconfig/gnunetdht.pc
/usr/lib/pkgconfig/gnunettransport.pc
/usr/lib/pkgconfig/gnunetdhtlog.pc
/usr/lib/pkgconfig/gnunetblock.pc
/usr/lib/pkgconfig/gnunetfragmentation.pc
/usr/lib/pkgconfig/gnunetnse.pc
/usr/lib/libgnunetnse.so
/usr/lib/libgnunetgns.so
/usr/lib/libgnunetdns.so
/usr/lib/libgnunettun.so
/usr/lib/libgnunetdatastore.so
/usr/lib/libgnunetdatacache.so
/usr/lib/libgnunetcore.so
/usr/lib/libgnunettransporttesting.so
/usr/lib/libgnunetblock.so
/usr/lib/libgnunetfs.so
/usr/lib/libgnunetstatistics.so
/usr/lib/libgnunettesting.so
/usr/lib/libgnunetfragmentation.so
/usr/lib/libgnunetdnsparser.so
/usr/lib/libgnunettestbed.so
/usr/lib/libgnunetarm.so
/usr/lib/libgnunetats.so
/usr/lib/libgnunetmysql.so
/usr/lib/libgnunetmesh.so
/usr/lib/libgnunetlockmanager.so
/usr/lib/libgnunetnat.so
/usr/lib/libgnunetpeerinfo.so
/usr/lib/libgnunetnamestore.so
/usr/lib/libgnunettransport.so
/usr/lib/libgnunetdht.so
/usr/lib/libgnunethello.so
/usr/lib/libgnunetpostgres.so
/usr/lib/libgnunetvpn.so
/usr/lib/libgnunetutil.so
/usr/lib/libgnunettesting_new.so