If got the mangler to produce working code at least in some cases - I still have to chase after a segfault in one larger program that I tried to compile.
That's great news!
Due too my lack of Perl knowledge, I didn't yet manage to remove the jumps from the slow to the fast entry points, and a function called __DISCARD__ must be present for linking (it's never called, though). Should the old PowerPC code in the mangler be kept there? It assumes a slightly different assembler dialect and a completely different linker, and as it just asks for $TargetPlatform =~ /^powerpc|rs6000/, it keeps getting in the way...
Sure, by all means remove this code. It hasn't been used for years, and we can always resurrect it from the repository if necessary. Cheers, Simon