[Bug libc/19613] New: s390x (64 bit) macro expansion WCOREDUMP and others

["planrichi at gmail dot com" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=19613

            Bug ID: 19613
           Summary: s390x (64 bit) macro expansion WCOREDUMP and others
           Product: glibc
           Version: 2.17
            Status: NEW
          Severity: normal
          Priority: P2
         Component: libc
          Assignee: unassigned at sourceware dot org
          Reporter: planrichi at gmail dot com
                CC: drepper.fsp at gmail dot com
  Target Milestone: ---

Hi,

the macro expansion still uses "union wait" even for newer s390x machines.
I was redirected here on the gcc-help mailing list.

See my mail with description here:

https://gcc.gnu.org/ml/gcc-help/2016-02/msg00040.html

And the answer here:

https://gcc.gnu.org/ml/gcc-help/2016-02/msg00041.html

In a nutshell: (s390x red hat linux 7.2)

Expanding WCOREDUMP((long)128L) expands to (((__extension__ (((union {
__typeof((long)128L) __in; int __i; }) {
.__in = ((long)128L) }).__i)).

Since it is a big endian machine, it will always return 0.

Richard

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