
Always sets the `pkg-config` environment hint for autotools. Required dependency for `autoreconf` of ZeroMQ when build from source (e.g. v4.2.2) via autotools in `autogen.sh` step for `autoreconf`.
Always sets the `pkg-config` environment hint for autotools. Required dependency for `autoreconf` of ZeroMQ when build from source (e.g. v4.2.2) via autotools in `autogen.sh` step for `autoreconf`.