[Openmp-dev] Steps to create a OpenMP enabled compiler?

[Bargava Raman, Subramanian]

Hi Jim,

If I am not wrong, XCode 5 symlinks gcc to clang. (XCode 5 for Mavericks
doesnt seem to support the GNU gcc). And so, it has no OpenMP support.

Also, on installing gcc, I was told that gcc will not be binary compatible
with Apple's LLVM-gcc and so, updating some of the existing libraries down
the road may have issues (I may be wrong here though).

To be on the safe side, I've been trying to install a LLVM compatible
OpenMP compiler.

Thanks,
Bargava


On Thu, Aug 21, 2014 at 6:29 PM, Cownie, James H <james.h.cownie at intel.com>
wrote:

>  I’m sorry to say that I think you’re confused and have just wasted your
> time.
>
> What you’ve done is to download and build the OpenMP runtime that is
> needed to work with the experimental OpenMP enabled clang front end.
>
>
>
> But, what you seem to want to do is simply to have a compiler that can
> compile OpenMP codes.
>
> Since you clearly already have gcc installed (otherwise you wouldn’t have
> been able to build the runtime by compiling it with gcc), I think you
> already have everything you need without building any compilers or compiler
> components.
>
>
>
> AFAICT since you can run gcc, you should also be able to run g++, which
> has OpenMP support, and you aren’t interested in (and don’t need) the
> experimental clang, or the runtime to support it.
>
>
>
> If you can’t just run g++, then check your PATHs and so on. (But none of
> that is relevant for debate here, since it’s all simply about installing
> GCC on your machine and making it work).
>
>
>
> -- Jim
>
> James Cownie <james.h.cownie at intel.com>
> SSG/DPD/TCAR (Technical Computing, Analyzers and Runtimes)
>
> Tel: +44 117 9071438
>
>
>
> *From:* openmp-dev-bounces at cs.uiuc.edu [mailto:
> openmp-dev-bounces at cs.uiuc.edu] *On Behalf Of *Bargava Raman, Subramanian
> *Sent:* Thursday, August 21, 2014 1:22 PM
> *To:* openmp-dev at dcs-maillist2.engr.illinois.edu
> *Subject:* [Openmp-dev] Steps to create a OpenMP enabled compiler?
>
>
>
> <<Apologies-This is a noob query>>
>
>
>
> My aim is to use OpenMP compiler to compile some libraries to make them
> run multi-threaded. I am on Mac OSX - Mavericks. (The command I need to run
> is g++ -fopenmp mylib.cpp)
>
>
>
> Following instructions from http://openmp.llvm.org/, I did the following
>
>
>
> *svn co http://llvm.org/svn/llvm-project/openmp/trunk
> <http://llvm.org/svn/llvm-project/openmp/trunk> openmp*
>
> *cd openmp/runtime*
>
> *make compiler=gcc*
>
>
>
> The make was successful. What should I do next?
>
>
>
> Can someone please provide guidance?
>
>
>
> Thanks,
>
> Bargava
>
>
>
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