Hello All- How does one introduce an alternate gcc compiler for CCTBX on Mac? I must be missing it in the documentation. I don’t want to use the old one in /usr/bin (and instead I want to you my newer one in /opt/gcc). I’ve tried all of the standard methods used by other build systems (change the $PATH, set $CXX and $CC, etc) but to no avail. These environment variables seem to be disregarded. We do use this compiler for building CCTBX on linux without too much trouble, so I think the support should be there. Specifically: mac-build64:build jenkins$ env | grep CXX CXX=/opt/gcc/current/bin/g++ mac-build64:build jenkins$ env | grep CC CC=/opt/gcc/current/bin/gcc mac-build64:build jenkins$ which gcc /opt/gcc/current/bin/gcc mac-build64:build jenkins$ g++ -v Using built-in specs. COLLECT_GCC=g++ COLLECT_LTO_WRAPPER=/opt/gcc/gcc-6.3.0-08092017/libexec/gcc/x86_64-apple-darwin11.4.2/6.3.0/lto-wrapper Target: x86_64-apple-darwin11.4.2 Configured with: ../gcc-6.3.0/configure --prefix=/opt/gcc/gcc-6.3.0-08092017 --enable-languages=c,c++,fortran,objc --with-gmp=/opt/gcc/gcc-6.3.0-08092017 --with-mpfr=/opt/gcc/gcc-6.3.0-08092017 --with-mpc=/opt/gcc/gcc-6.3.0-08092017 --enable-libgomp --disable-multilib Thread model: posix gcc version 6.3.0 (GCC) mac-build64:build jenkins$ /opt/python/current/bin/python ../modules/cctbx_project/libtbx/configure.py cctbx Python: 2.7.9 "/opt/python/current/bin/python" Compiler: default .... This script is only applicable to Linux - exiting. Done. mac-build64:build jenkins$ make ./bin/libtbx.scons -j "`./bin/libtbx.show_number_of_processors`" scons: Reading SConscript files ... On MacOS, using clang 4.2.0 Xcode 4.6.3 Build version 4H1503 ... Thanks for your help! -Lance ____________________ Lance M. Westerhoff, Ph.D. President and General Manager QuantumBio Inc. WWW: http://www.quantumbioinc.com Email: [email protected]