By default, the Makevar LLVM_DEFAULT is globally defined by the ports infrastructure via Mk/bsd.default-versions.mk. Therefore, it should be under control of the user. MarkLinimon believes that this global Makevar should not be overridden in port Makefiles.

Some ports use the LLVM_DEFAULT Makevar, but some use their own, or, worse, hardcode a version number.

This is a common case – but see ObsoleteLLVMVersions for the maintenance hassles it causes.

In general these are symbolic definitions via LLVM_VER or similar.

Example:

{ {{ LLVM_VER= 80 BUILD_DEPENDS+= clang${LLVM_VER}:devel/llvm${LLVM_VER} } }}

We should standardize on a variable name. In use: LLVM_VER LLVM_VERSION LLVMVER VBOX_LLVM_VER.