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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/54715] !$OMP SINGLE NOWAIT gives compiler error
Date: Wed, 26 Sep 2012 12:33:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54715

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
                 CC|                            |jakub at gcc dot gnu.org
         Resolution|                            |INVALID

--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-09-26 12:32:56 UTC ---
That is correct, what you are trying to compile is not valid OpenMP.
You want
!$omp single
  write(*,*) 'bla'
!$omp end single nowait
as in Fortran nowait is end_clause, not clause.  See e.g. OpenMP 3.1, 2.5.3.