%{_libdir}/pkgconfig is a directory and should thus be prefixed by
%{dir} (oops.) This issue caused the debuginfo build under RHEL 8
(which is apparently now enabled by default-- regardless of whether the
RPM actually contains debug info, but that's another matter) to fail
with:
RPM build errors:
File listed twice: /opt/libjpeg-turbo/lib64/pkgconfig/libjpeg.pc
File listed twice: /opt/libjpeg-turbo/lib64/pkgconfig/libturbojpeg.pc
%{_libdir}/libjpeg.so.@SO_MAJOR_VERSION@
%{_libdir}/libjpeg.so
%{_libdir}/libjpeg.a
-%{_libdir}/pkgconfig
+%dir %{_libdir}/pkgconfig
%{_libdir}/pkgconfig/libjpeg.pc
%{_libdir}/libturbojpeg.so.0.1.0
%{_libdir}/libturbojpeg.so.0