[Bug libstdc++/118559] New: [15 Regression] __array_rank is broken for clang so need workaround in libstdc++

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118559

            Bug ID: 118559
           Summary: [15 Regression] __array_rank is broken for clang so
                    need workaround in libstdc++
           Product: gcc
           Version: 15.0
            Status: UNCONFIRMED
          Keywords: rejects-valid
          Severity: normal
          Priority: P3
         Component: libstdc++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: pinskia at gcc dot gnu.org
  Target Milestone: ---

clang seems to have a broken __array_rank and I have no idea when it will be
fixed but we should most likely disable the use of __array_rank in libstdc++
for clang until it is known that clang is fixed.

See upstream clang bug https://github.com/llvm/llvm-project/issues/123498 for
more details on it.