should default CC=clang on mac

[cartazio]

The system assembly on Mac doesn't understand AVX instructions, which is probably an ongoing source of confusion when people try to build open blas on a mac,

the work around is using CC=clang, because the clang assembler goes via llvm.

this problem is dealt with when using mac homebrew to install on a mac, but would be a good idea to make clang the default for doing assembling on mac (and compiling too i suppose)

[xianyi]

Hi @cartazio ,

I fixed it on develop branch. Please try it :)

Xianyi

[cartazio]

thanks! Testing it now and it's built to completion. (for those who used mac brew to install it, this probably didn't matter, but some folks prefer other build approaches).

I'm likely to be writing a haskell Blas / Lapack binding shortly that (for now) will only support OpenBlas (to keep things simple), so I hope you don't mind any associated uptick in tickets etc from me or other haskellers soon.

[xianyi]

@cartazio, please don't hesitate to file the bug.