C99 usage in gcc [was Re: build failure on mainline due to java/expr.c]

[Andrew Haley <aph at redhat dot com>]

Andrew Pinski writes:
 > 
 > On Jan 29, 2004, at 15:43, Ben Elliston wrote:
 > 
 > > Hi Andrew
 > >
 > > It seems that reverting this patch of yours corrects a build failure I
 > > am experiencing.  I didn't bother looking any closer at it.
 > >
 > > 2004-01-28  Andrew Haley  <aph@redhat.com>
 > >
 > > 	* expr.c (build_field_ref): Widen field offset.
 > 
 > The problem again is that compiling a cross compiler with an older 
 > version of gcc, 2.95.3
 > can cause an parse error as it does not support C99 of putting variable 
 > declaration anywhere.
 > I applied this patch as obvious.

Thanks.

I didn't get a warning for this, despite compiling with "-Wall
-Werror".  This strikes me as odd.

Compiling this testcase:

int foo (void)
{
  int a = 99;
  a++;
  int b = a;
  return b;
}

with "-Wall -std=c89" doesn't seem to generate any warnings either.

Andrew.