[PATCH] D21991: [libunwind][ARM] Improve unwinder stack usage - Make WMMX support optional

[Saleem Abdulrasool via cfe-commits]

compnerd added a subscriber: compnerd.
compnerd added a comment.

I don't think that clang nor LLVM have much in terms of support for XScale.  Can we do something more convoluted perhaps?  I like the preprocessor based approach.  However, if the compiler doesn't define it with the correct target, we define it and push it into the CPPFLAGS.  This way, in the future, we can rely on the compiler to do the right thing and eventually lose the cmake magic.


http://reviews.llvm.org/D21991