Re: [gfortran,PATCH] alloca() is undeclared in env.c

[Steve Kargl <sgk at troutmask dot apl dot washington dot edu>]

On Wed, Sep 15, 2004 at 05:47:11PM -0700, Richard Henderson wrote:
> On Wed, Sep 15, 2004 at 04:26:22PM -0700, Steve Kargl wrote:
> >  AC_STDC_HEADERS
> > -AC_HAVE_HEADERS(stdlib.h stdio.h string.h stddef.h math.h unistd.h)
> > +AC_HAVE_HEADERS(alloca.h stdlib.h stdio.h string.h stddef.h math.h unistd.h)
> 
> Alloca is much trickier than that.  See AC_FUNC_ALLOCA.
> You may want to skip all that and do
> 
> #define alloca(x)  __builtin_alloca(x)
> 
> in libgfortran, since we know for a fact that we're
> building with gcc, and the current version at that.
> 

The revised patch uses the above define.  On at least
FreeBSD, alloca() is declared in stdlib.h, so we need
to do the #undef.  Richard if you want to change the
name in ChangeLog entry, it's fine with me.

2004-09-16  Steven G. Kargl  <kargls@comcast.net>

         * intrinsics/env.c: Use __builtin_alloca(x).

-- 
Steve

Attachment: env.c.diff
Description: Text document