Add CC&CXX environment variables in your OpenBSD profile

From OpenBSD 6.2, clang has become the default compiler. So maybe you need to add CC&CXX environment variables in your personal.profile:

export CC=clang
export CXX=clang++

That’s because some software will select gcc as the compiler if you don’t specify these environment variables. The gcc is too old (4.2.1) and not maintained on OpenBSD anymore.