[cfe-dev] [RFC] Changing tool search path priority

[Joerg Sonnenberger via cfe-dev]

On Thu, May 14, 2020 at 03:11:23PM +0100, David Spickett wrote:
> > ...but I don't think we should ever be looking for
> > ${DEFAULT_TRIPLE}-gcc. That doesn't make sense to me at all.
> 
> IIt was added in https://reviews.llvm.org/D13340. Quoting a comment there:
> ""LLVMDefaultTargetTriple is the value specified with the CMake
> variable -DLLVM_DEFAULT_TARGET_TRIPLE= during configuration time. For
> example, using --target=mips64el-mti-linux will search for files prefixed
> with either mips64el-mti-linux-{as,ld} and mips-mti-linux-{as,ld} in our
> toolchain where we specify -DLLVM_DEFAULT_TARGET_TRIPLE=mips-mti-linux."
> 
> I guess that allows you to only package one copy of tools that can handle
> both targets.

That seems ..strangely specific. We certainly have cases where multiple
architecture variants are targetting a single binutils environment in
NetBSD, but those are all controlled by the appropiate flags to the
tools. The default target doesn't leak through and I don't think it ever
should. That completely defeats the goal of a universal toolchain.

Joerg