[patch] fix pr16923 for darwin

[Tom Tromey]

>>>>> "Andreas" == Andreas Tobler <toa@pop.agri.ch> writes:

Andreas> this one fixes the PR16923 for darwin. The linker is a
Andreas> chatterbox and we get some unresolved.
Andreas> ok for main?

This looks basically fine...
I see we have 3 ways of doing this:

    if { [string match "powerpc-*-darwin*" $target_triplet] } {

	if { [istarget "*-*-darwin*"] } {

Andreas> +  if { [ regexp {powerpc-apple-darwin} $host_triplet] } {

How about we just pick one and use it everywhere?
Or maybe even add a helper proc of some kind to set this up?

Tom