[Patch, Fortran] PR 58099: [4.8/4.9 Regression] [F03] over-zealous procedure-pointer error checking

[Janus Weil]

Hi all,

here is a small regression-fix patch for a problem with procedure
pointers and the PURE attribute, for details see the PR. In essence:
gfc_compare_interfaces is asymmetric in the two interfaces it compares
(e.g. regarding the PURE attribute), and we must not symmetrize it by
calling it twice with exchanged arguments.
Regtested on x86_64-unknown-linux-gnu. Ok for trunk?

Cheers,
Janus



2013-08-07  Janus Weil  <ja...@gcc.gnu.org>

    PR fortran/58099
    * expr.c (gfc_check_pointer_assign): Remove second call to
    'gfc_compare_interfaces' with swapped arguments.
    * interface.c (gfc_compare_interfaces): Symmetrize the call to
    'check_result_characteristics' by calling it with swapped arguments.

2013-08-07  Janus Weil  <ja...@gcc.gnu.org>

    PR fortran/58099
    * gfortran.dg/proc_ptr_43.f90: New.

pr58099.diff
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proc_ptr_43.f90
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