+If rdma-core libraries are built but not installed, DPDK makefile can link them,
+thanks to these environment variables:
+
+ - ``EXTRA_CFLAGS=-I/path/to/rdma-core/build/include``
+ - ``EXTRA_LDFLAGS=-L/path/to/rdma-core/build/lib``
+ - ``PKG_CONFIG_PATH=/path/to/rdma-core/build/lib/pkgconfig``
+