[Bug fortran/79484] Segfault when executing a test in Power8

[kargl at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79484

kargl at gcc dot gnu.org changed:

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

--- Comment #5 from kargl at gcc dot gnu.org ---
(In reply to smateo from comment #4)

> 
> Of course using the ISO_C_BINDINGS interoperability module and BIND(C) would
> be a more appropriate way of doing it, but they were introduced in F2003. I
> guess that a code like the one I attached should work in the
> pre-interoperability era (we may need to remove the VALUE attributes since
> this attribute was introduced also in F2003).

Using ISO C binding is the only appropriate way to interface
Fortran and C  All other methods require the user to understand
what they are doing on any particular architecture.  It should
be noted that 2017-2003 is 14 years.  It's not as-if Fortran 
2003 was released 6 month ago.

> I decided to open this ticket because, as you said, this code works nicely
> in x86_64 (I also tried in some ARM machines and also worked), and because
> changing the optimization level flags made it work.

Your code worked because it aligns with a specific target model.
Does power8 have the exact architecture as x86-64?