LLVM 3.5 rebase

[Adam Jackson]

On Wed, 2014-11-05 at 00:44 -0500, Jens Petersen wrote:
> llvm-3.5 seems to break Haskell programs compiled with ghc on ARM badly.
> 
> > Perhaps I should just barge ahead with a compat-llvm34?
> 
> Adam: this would be very welcome for ghc
> (ghc only needs llvm - not any clang bits).
> 
> Otherwise currently we can't build any Haskell packages in Rawhide
> because compiled programs all fail to run on armv7hl with a runtime error:

I don't think compat-llvm34 would save you.  ghc emits llvm ir directly,
then invokes llc to compile it; /usr/bin/llc would only be provided by
llvm, not by the compat package which would be just the old library.

Sounds like a problem for the arm maintainer.

- ajax