[Bug fortran/32467] structure containing allocatable array is accepted in COPYIN clause

["burnus at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #4 from burnus at gcc dot gnu dot org  2007-06-22 21:06 -------
Thanks for the report.

(By the way, ifort does accept the program and gives the right result whereas
sunf95 has the same problem as gfortran.)

There are actually two problems:

a) "Allocatable arrays may not appear in a copyin clause."
   This is violated for  copyin(struc1)
   One should at least print a warning with -Wall, but I'm not sure
   whether one need to reject it as GCC seems to do the right thing (cf. (b))

b) If one replaces the "allocatable :: a(:)" by "a(2)" this constrain is met,
   but the number of threads is still (one thread per CPU core online) instead
   of being omp_set_num_threads(4).

Reading and re-reading 2.4.1 I fail to find the place which says that with
  omp_set_dynamic(.true.)
  omp_set_num_threads(4)
the number of threads is guaranteed to be 4. Using omp_set_dynamic(.false.) the
situation is clear and gfortran (and sunf95) produce the same result.
I have the feeling that the result of gfortran is perfectly valid.

ifort seems to default for dyn-var = true to the specified number number of
processors whereas sunf95 and gfortran seem to use min(CPU cores online,
specified num_threads).


-- 

burnus at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jakub at gcc dot gnu dot org
                URL|                            |http://www.openmp.org/drupal
                   |                            |/mp-documents/spec25.pdf
           Keywords|accepts-invalid             |wrong-code


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32467