Increase stack limit on Windows hosts

[Paolo Bonzini]

> 2008-06-08  Joseph Myers  <joseph@codesourcery.com>
> 
> 	PR tree-optimization/36218
> 	* Makefile.tpl (EXTRA_BUILD_FLAGS): Define.
> 	(all prefix="build-"): Pass them to build-system sub-makes.
> 	* Makefile.in: Regenerate.

These are okay.

However, instead of this...

> 2008-06-08  Joseph Myers  <joseph@codesourcery.com>
> 
> 	PR tree-optimization/36218
> 	* configure.ac: Use empty LDFLAGS when running configure for the
> 	build system.
> 	* configure: Regenerate.
> 	* Makefile.in (BUILD_LDFLAGS): Do not define to $(LDFLAGS) unless
> 	host == build.

... can you add

flags_to_pass = { flag= LDFLAGS_FOR_BUILD ; };

to Makefile.def and use it in gcc/configure.ac?  This would fix the case 
in which a generator program used lots of stack.

Using an ifeq in the Makefile.in is fine but, if you're adding 
LDFLAGS_FOR_BUILD, it's probably easier to add a @BUILD_LDFLAGS@ 
autoconf substitution at the same time, that is set in the same place as 
CFLAGS_FOR_BUILD.

Paolo