Keep in mind that by setting your choice of default compiler in /etc/make.conf like that, your system will use it for everything including all ports. This may not be a good idea. There are a few ports that still require GCC to build and/or function correctly.Which FreeBSD version? Since 9.3 clang is default.CC=clang(XY) CXX=clang++(XY) CPP=clang-cpp(XY)- you can set with XY the clang version, but it is optional.