Fix N_BNSYM horkage on alpha

[Eric Botcazou]

> This patch,
>
> 2004-08-12  Devang patel  <dpatel@apple.com>
>
>         * dbxout.c (dbxout_begin_prologue): New function.
>         (dbx_debug_hooks): Use new begin prologue hook.
>         (dbxout_function_end): Emit N_ENSYM.
>         * stab.def (N_BNSYM, N_ENSYM): Define and document these two new
> stabs.
>
> causes the Alpha stabs-to-mdebug converter to hork.

It's problematic on Solaris too, because the assembler can't grok .stabd 
directives.

> It's certain that we shouldn't be using the new stabs without
> extensions enabled.  It's also certain that if NO_DBX_FUNCTION_END
> is defined, we're working with a stabs subset.

NO_DBX_FUNCTION_END is not defined on Solaris so I'd like to add an ad-hoc 
macro to have a bit more granularity.

OK for mainline?


2004-09-21  Eric Botcazou  <ebotcazou@libertysurf.fr>

	* config.gcc (sparc64-*-solaris2*): Include sparc/sol2-gas.h
	if the GNU assembler is used.
	(sparc-*-solaris2*): Likewise.
	* dbxout.c (NO_DBX_BNSYM_ENSYM): Default to zero.
	(dbxout_function_end): Protect N_ENSYM with it.
	(dbxout_begin_prologue): Protect N_BNSYM with it.
	* doc/tm.texi (NO_DBX_BNSYM_ENSYM): Document it.
	* config/sparc/sol2.h (NO_DBX_BNSYM_ENSYM): Define to 1.
	* config/sparc/sol2-gas.h: New file.


-- 
Eric Botcazou
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