/usr/lib/x86_64-linux-gnu/pkgconfig/groonga.pc is in libgroonga-dev 6.0.1-1ubuntu1.
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 17 18 19 20 | prefix=/usr
exec_prefix=${prefix}
bindir=${exec_prefix}/bin
sbindir=${exec_prefix}/sbin
libdir=${prefix}/lib/x86_64-linux-gnu
includedir=${prefix}/include
datarootdir=${prefix}/share
datadir=${datarootdir}
document_root=${datadir}/groonga/html/admin
pluginsdir=${libdir}/groonga/plugins
groonga=${bindir}/groonga
groonga_httpd=${sbindir}/groonga-httpd
groonga_suggest_create_dataset=${bindir}/groonga-suggest-create-dataset
groonga_version=6.0.1
Name: Groonga
Description: An Embeddable Fulltext Search Engine
Version: 6.0.1
Libs: -L${libdir} -lgroonga
Cflags: -I${includedir}/groonga
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