Re: -xc99=all and libraries on Solaris 10

[Peter O'Gorman]

Hi Bruno,

I never followed up on this, sorry.

On Sun, Dec 26, 2010 at 04:46:14PM +0100, Bruno Haible wrote:
> Hi,
> 
> Reviving an old thread from February 2010.
> In <http://lists.gnu.org/archive/html/autoconf/2010-02/msg00013.html>
>
> There is a bug open about this, though:
> <http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40411>
> 

Thank you for commenting on that bug, I agree completely.


> I hope this flag won't be used by GCC, because it's a bad idea, just
> like the _fmode variable on Windows.

It turns out the HP-UX does a very similar thing, but is dependent on
the setting of UNIX95 or UNIX_STD environment variables rather than
compiler flags (see standards(5) and /usr/lib/unix*.o
/usr/lib/hpux*/unix*.o etc).

However we've never run into it on HP-UX, mostly because autoconf does
not export any env vars in AC_PROG_CC_C99/AC_PROG_CC_STDC, it does,
however add -xc99=all on solaris, so even though we consistently set CC,
CFLAGS and so on at build time, we sometimes get libraries with __xpg
symbols dependent on whether the configure.ac has one of those two
macros.

We patch our autoconf to not add -xc99=all to avoid the issue.

Peter
-- 
Peter O'Gorman
address@hidden