Building The Accelio XioMessenger is built conditionally only, when --enable-xio is provided to configure. Accelio depends on OpenFabrics verbs development headers/libraries. Prior to installing the Accelio package, the following prerequisites are required: RedHat (RHEL 6.4 and above) yum groupinstall "Infiniband Support" yum install libtool autoconf automake yum install infiniband-diags perftest libibverbs-utils librdmacm-utils yum install librdmacm-devel libibverbs-devel numactl numactl-devel libaio-devel libevent-devel Ubuntu (Ubuntu 13.04 and above) apt-get install libtool autoconf automake build-essential apt-get install ibverbs-utils rdmacm-utils infiniband-diags perftest apt-get install librdmacm-dev libibverbs-dev numactl libnuma-dev libaio-dev libevent-dev MLNX_OFED Mellanox OFED pacakage is optional and recommended look for latest OFED packages at: http://www.mellanox.com/page/products_dyn?product_family=26 If either the Accelio or OFED development environments are in non-standard locations, include and library paths must be added to both CFLAGS and CXXFLAGS, in the Autotools build as of 1/1/2015. -Matt