[cfe-dev] dragonegg and clang openmp

[Andrey Bokhanko]

Régis,

First of all, there is no need to use Intel fork anymore -- OpenMP 3.1
support is fully upstreamed to clang / llvm trunk.

Second, OpenMP implemented in Clang front-end -- there is literally
nothing OpenMP-specific in LLVM back-end. Given that dragonegg
generates LLVM IR and skips Clang, our OpenMP implementation is not
suitable for it (dragonegg) at all.

Yours,
Andrey Bokhanko
==============
Software Engineer
Intel Compiler Team
Intel


On Wed, Jul 8, 2015 at 8:45 PM, Régis Portalez
<regis.portalez at altimesh.com> wrote:
> Jack.
>
> Thanks for the explanation.
>
> What if I use clang 3.5 (the Intel fork I mentioned below),and gcc 4.8? Will
> I be able to compile dragonegg? And will that generate omp directives?
>
> Otherwise, is there any other way to compile Fortran omp code to llvm IR?
>
> (I don't want to generate binaries but rather llvm IR)
>
> Thanks.
> ________________________________
> De : Jack Howarth
> Envoyé : ‎08/‎07/‎2015 16:14
> À : regis portalez
> Cc : clang-dev Developers
> Objet : Re: [cfe-dev] dragonegg and clang openmp
>
> Régis,
>         Unfortunately dragonegg is unmaintained and won't be part of
> the releases starting with 3.7.0. Also, the existing dragonegg sources
> only are only buildable against FSF gcc 4.8 or earlier. Lastly, the
> libgomp support in clang 3.7.0 is non-functional as it emits no code
> and that the functional OpenMP support in libomp is not binary
> compatible with libgomp. So you are stuck with compiling Ada and
> fortran code against FSF libgomp and c/c++ code against LLVM's libomp.
>                Jack
>
> On Wed, Jul 8, 2015 at 4:34 AM, regis portalez
> <regis.portalez at altimesh.com> wrote:
>> Hi,
>>
>>
>>
>> I just noticed that latest dragonegg (http://dragonegg.llvm.org/)  release
>> has full support of Ada and Fortran.
>>
>> On the other hand, clang openmp (https://clang-omp.github.io/) has full
>> support of openmp 3.1 and targets openmp 4.0.
>>
>>
>>
>> So I’d like to know if it’s possible to make those two work together, and
>> compile fortran/ada openmp code with clang.
>>
>>
>>
>> Thanks,
>>
>>
>>
>> Régis Portalez
>>
>>
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>>
>
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