[Bug c++/65370] New: [5 Regression] rejects valid code on powerpc64le-linux-gnu

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65370

            Bug ID: 65370
           Summary: [5 Regression] rejects valid code on
                    powerpc64le-linux-gnu
           Product: gcc
           Version: 5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: doko at gcc dot gnu.org

Created attachment 34999
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=34999&action=edit
preprocessed source

from ppl-1.1, r221254 on powerpc64le-linux-gnu. works on all other
architectures, and with 4.9:

$ g++ -c C_Polyhedron.ii 
In file included from algorithms.hh:28:0,
                 from C_Polyhedron.cc:28:
Pointset_Powerset_defs.hh:1402:37: error: redeclaration of 'template<class QH>
Parma_Polyhedra_Library::Pointset_Powerset<PSET>::Pointset_Powerset(const
Parma_Polyhedra_Library::Pointset_Powerset<QH>&,
Parma_Polyhedra_Library::Complexity_Class) [with QH = QH; PSET =
Parma_Polyhedra_Library::NNC_Polyhedron]' may not have default arguments
[-fpermissive]