OpenLB – Open Source Lattice Boltzmann Code › Forums › on OpenLB › General Topics › Install issue olb-1.5r0 › Reply To: Install issue olb-1.5r0 May 7, 2022 at 10:00 am #6549 AdrianKeymaster In this case the GCC version is too old also on the Red Head system. What does “g++ -v” return? We need at least GCC 9. System provided tinyxml will only be used if “USE_EMBEDDED_DEPENDENCIES := OFF” is set in config.mk