[oi-dev] Clang and GCC6 runtime

[Alexander Pyhalov]

No, -fopenmp seems to be implemented wrong.
_REENTRANT is not defined, libgomp is not linked.
If we specify "clang++  omp.cc -fopenmp=libgomp -o omp", application is linked, but pragma parallel uses just one thread.

When -pthreads is used, _REENTRANT is undefined.

-pthread seems to work as expected.

С уважением,
Александр Пыхалов,
программист отдела телекоммуникационной инфраструктуры
управления информационно-коммуникационной инфраструктуры ЮФУ


________________________________________
От: Bob Friesenhahn <bfriesen at simple.dallas.tx.us>
Отправлено: 31 июля 2019 г. 21:48
Кому: Alexander Pyhalov via oi-dev
Тема: Re: [oi-dev] Clang and GCC6 runtime

On Wed, 31 Jul 2019, Alexander Pyhalov via oi-dev wrote:

> OK
> I have almost working Clang 8.0.1.

Do the normal -pthreads and -fopenmp (OpenMP) options work with this
build?  I was excited when I found Clang 8 available from pkgsrc but
was disappointed when I found that GCC options normally available from
Solaris are not working.  It may be that Clang is lacking
customizations necessary to emulate GCC under Solaris-derived systems.

Bob
--
Bob Friesenhahn
bfriesen at simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer,    http://www.GraphicsMagick.org/
Public Key,     http://www.simplesystems.org/users/bfriesen/public-key.txt

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