[PATCH] PR libgomp/28296: Bootstrap failure on Tru64

[Roger Sayle]

Hi Andrew,

On Mon, 11 Sep 2006, Andrew Pinski wrote:
> On Mon, 2006-09-11 at 09:21 -0600, Roger Sayle wrote:
> > The following patch resolves PR libgomp/28296 which a boostrap failure
> > on alphaev67-dec-osf5.1 triggered by Eric Christopher's 2006-07-05
> > change to libgomp's configure.ac to avoid the use of -pthread on darwin.
> > http://gcc.gnu.org/viewcvs?view=rev&revision=115205
> >
> > Unfortunately, that change contained two mistakes: the first is that
> > it removed -pthread from $CFLAGS on all platforms (it's necessary on
> > those that require _REENTRANT to be defined to get the pthreads APIs),
> > and the second was that it used "default)" in a case statement instead
> > of "*)" thereby disabling the setting of XPCFLAGS on all non-darwin
> > platforms.
> >
> > The change below has been tested on alphaev67-dec-osf5.1 where it
> > allows a default bootstrap, except for java, to complete without
> > problems.
>
> Can't we just get darwin to ignore -pthread?  There are already bugs
> asking for -pthread to become more target independent.

I agree that would be the sensible change.  We've already added -pthread
to gcc on Solaris and IRIX purely to support libgomp's configury.
However I'm not sure we're quite ready to make that a requirement of a
port.  Making libgomp's configury more flexible seems like a good
intermediate/compromise step.

We've also got PR's for enabling libgomp to use of system thread libraries
other than POSIX pthreads.  :-)

Roger
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