C++ err msgs

[Benjamin Kosnik]

> 2000-05-13  Gabriel Dos Reis <gdr@codesourcery.com>
> 
> 	* diagnostic.h (DIAGNOSTICS_SHOW_PREFIX_ONCE): New macro.
> 	(DIAGNOSTICS_SHOW_PREFIX_NEVER): Likewise.
> 	(DIAGNOSTICS_SHOW_PREFIX_EVERY_LINE): Likewise.
> 	(struct output_buffer: emitted_prefix_p, prefixing_rule): New
> 	fields. 
> 	(set_message_prefixing_rule): Declare.
> 
> 	* diagnostic.c: (current_prefixing_rule): New variable.
> 	(set_message_prefixing_rule): Define.
> 	(output_set_prefix): Adjust buffer->emitted_prefix_p.
> 	(init_output_buffer): Adjust Initialization.
> 	(output_emit_prefix): Rewrite.  Take prefixing rules into account.
> 
> cp/
> 
> 2000-05-13  Gabriel Dos Reis <gdr@codesourcery.com>
> 
> 	* lex.c: #include diagnostic.h.
> 	(lang_init_options): Set default prefixing rules.
> 
> 	* lang-options.h: Add -fdiagnostics-show-location=.
> 	
> 	* decl2.c: #include diagnostic.h.
> 	(lang_decode_option): Handle -fdiagnostics-show-location=.
> 


thanks so much for doing this Gaby. Please, please check this in.

-benjamin