I would think "--without-rdma" is fine, or better yet, just don't add the "--with-rdma" option at all.

# additional configuration options add_configopts = [] - add_configopts.append('--with-rdma=%s' % self.cfg['rdma_type']) + + if self.cfg['rdma_type']: + add_configopts.append('--with-rdma=%s' % self.cfg['rdma_type']) + else: + add_configopts.append('--without-rdma') Hmm, when testing this with the existing MVAPICH2-2.0.1-GCC-4.8.4.eb, I ran into this: configure: error: The specified RDMA type is not supported @peterinl<https://urldefense.proofpoint.com/v2/url?u=https-3A__github.com_peterinl&d=DwMCaQ&c=54IZrppPQZKX9mLzcGdPfFD1hxrcB__aEkJFOKJFd00&r=VD5f2fmYCM88Lmt8lP2vDozTKjzEta5k_T69kJ9hJso&m=GO-YiEmKDgeYWTU3TTRKDRPCIUhBM2qOR_SEI2ZAbv8&s=_P11Kzqmbxav1Cw8JXEGEPDe38p79QukbpCCZVNRvDY&e=>: Maybe --without-rdma is not sufficient? Should this be something different? — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub<https://urldefense.proofpoint.com/v2/url?u=https-3A__github.com_easybuilders_easybuild-2Deasyblocks_pull_1586-23pullrequestreview-2D175700275&d=DwMCaQ&c=54IZrppPQZKX9mLzcGdPfFD1hxrcB__aEkJFOKJFd00&r=VD5f2fmYCM88Lmt8lP2vDozTKjzEta5k_T69kJ9hJso&m=GO-YiEmKDgeYWTU3TTRKDRPCIUhBM2qOR_SEI2ZAbv8&s=--bld2ccm8yFr1rI_a_qsXqfcuPnM8rspVOoKv0rto8&e=>, or mute the thread<https://urldefense.proofpoint.com/v2/url?u=https-3A__github.com_notifications_unsubscribe-2Dauth_Aq-2D-5F8uTswNIFMO3I7TnhUSh9fcfYGm8mks5uvnnPgaJpZM4YlxDL&d=DwMCaQ&c=54IZrppPQZKX9mLzcGdPfFD1hxrcB__aEkJFOKJFd00&r=VD5f2fmYCM88Lmt8lP2vDozTKjzEta5k_T69kJ9hJso&m=GO-YiEmKDgeYWTU3TTRKDRPCIUhBM2qOR_SEI2ZAbv8&s=rqAKPE_yhIFbGML2t4dCB7V0Yd85z0O9kb3XKPS6iWg&e=>.