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From: "skunk at iskunk dot org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug other/53179] New: fixinclude needed for pthread.h on AIX 5.3 (PTHREAD_ONCE_INIT)
Date: Tue, 01 May 2012 20:16:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53179

             Bug #: 53179
           Summary: fixinclude needed for pthread.h on AIX 5.3
                    (PTHREAD_ONCE_INIT)
    Classification: Unclassified
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: other
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: skunk@iskunk.org
              Host: powerpc-ibm-aix5.3.0.0
            Target: powerpc-ibm-aix5.3.0.0
             Build: powerpc-ibm-aix5.3.0.0


Created attachment 27274
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=27274
/usr/include/pthread.h from AIX 5.3

$ cat pth.c
#include <pthread.h>

pthread_once_t once = PTHREAD_ONCE_INIT;

int main(void) { return 0; }

$ OBJECT_MODE=32 gcc -W -Wall -c pth.c
pth.c:3:1: warning: missing braces around initializer
pth.c:3:1: warning: (near initialization for 'once.__on_word')

$ gcc -maix64 -W -Wall -c pth.c
pth.c:3:1: warning: missing braces around initializer
pth.c:3:1: warning: (near initialization for 'once.__on_word')

This is bad if you're building with -Werror.

Inexplicably, both the 32- and 64-bit forms of the PTHREAD_ONCE_INIT
initializer lack a pair of curly-braces. This despite other initializers in the
same file having the same form, and the correct double-brace syntax.

I am attaching a copy of both the original, unmodified pthread.h header, and my
manually-fixed version.