[trunk][patch] Don't print warnings in mangle_decl

[Rafael Espindola]

> I will take another look to see if cp_finish_decl is a good place.

It works. I also tested this patch with


extern int a;
void f(void);
int b;
int g(int c)
{
  f();
  b = c;
  return a;
}

and a hack to always print the warning. We print warnings for a, b,f and g.

2009-04-16  Rafael Avila de Espindola  <espindola@google.com>

	* cp-tree.h (lang_identifier): Add ABI_WARNING.
	(IDENTIFIER_EMIT_ABI_WARNING_P): New.
	* decl.c (cp_finish_decl): Print warning for ABI changes.
	* mangle.c (finish_mangling_internal): Don't print warning. Set
	ABI_WARNING if one is needed. Update all callers.
	* semantics.c (expand_or_defer_fn): Print warning for ABI changes.


2009-04-16  Rafael Avila de Espindola  <espindola@google.com>

	* g++.dg/abi/mangle32.C: New.

Cheers,
-- 
Rafael Avila de Espindola

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