support Clang for OpenMP testing about kernels HOT 5 CLOSED

If Clang 3.8 (most recent package in the whitelisthttps://github.com/travis-ci/apt-package-whitelist/blob/master/ubuntu-precise) supports OpenMP then this is easy

I believe that OpenMP should be fine in Clang 3.8; in 3.7 you had to use –fopenmp=libomp but I think that is all fixed in 3.8.

from kernels.

Can I use GOMP for the runtime library? libgomp is on the whitelist (https://github.com/travis-ci/apt-package-whitelist/blob/master/ubuntu-precise#L5015) but libomp is not. I would really like to not have to build the OpenMP runtime library from source...

from kernels.

libomp should be installed as part of clang, I believe.

You can’t use libgomp, it has a different ABI from that which is used by clang.
(Most of the libgomp ABI is supported by libomp, so you could use gcc compiled code with libomp, but libgomp does not support the ABI used buy clang, so the other way around does not work).

from kernels.

Resolved by the series of commits ending in 8a12ce2, i.e. PR #38.

from kernels.

Note that this is a partial resolution, because we only test Clang-OpenMP on Mac and as part of the Homebrew package.

We will support Clang 3.8 packages in Linux eventually.

from kernels.