[mainline] PATCH to diagnostic initialization

[gdr at integrable-solutions dot net]

This prepares for language-specific initializations of the global
diagnostic context structure.  Latter patches will use this facility.

Bootstrapped and regtested on an i686-pc-linux-gnu.

-- Gaby

Index: ChangeLog
===================================================================
RCS file: /cvs/gcc/gcc/gcc/ChangeLog,v
retrieving revision 2.708
diff -p -r2.708 ChangeLog
*** ChangeLog	3 Aug 2003 14:31:16 -0000	2.708
--- ChangeLog	3 Aug 2003 22:09:53 -0000
***************
*** 1,3 ****
--- 1,24 ----
+ 2003-08-03  Gabriel Dos Reis  <gdr@integrable-solutions.net>
+ 
+ 	* opts.c (decode_options): Do language-specific initialization for
+ 	the global diagnostic context.
+ 	* langhooks-def.h (lhd_initialize_diagnostics): Declare.
+ 	(LANG_HOOKS_INITIALIZE_DIAGNOSTITCS): New macro.
+ 	(LANG_HOOKS_INITIALIZER): Adjust.
+ 	* langhooks.h (struct lang_hooks): Add new field 
+ 	initialize_diagnostics. 
+ 	* langhooks.c (lhd_initialize_diagnostics): Define.
  
  	* builtins.def (BUILT_IN_ABS, BUILT_IN_IMAXABS, BUILT_IN_LABS,
Index: langhooks-def.h
===================================================================
RCS file: /cvs/gcc/gcc/gcc/langhooks-def.h,v
retrieving revision 1.58
diff -p -r1.58 langhooks-def.h
*** langhooks-def.h	31 Jul 2003 19:26:16 -0000	1.58
--- langhooks-def.h	3 Aug 2003 22:09:56 -0000
*************** extern int lhd_tree_inlining_anon_aggr_t
*** 79,84 ****
--- 79,85 ----
  extern int lhd_tree_inlining_start_inlining (tree);
  extern void lhd_tree_inlining_end_inlining (tree);
  extern tree lhd_tree_inlining_convert_parm_for_inlining (tree, tree, tree);
+ extern void lhd_initialize_diagnostics (struct diagnostic_context *);
  
  #define LANG_HOOKS_NAME			"GNU unknown"
  #define LANG_HOOKS_IDENTIFIER_SIZE	sizeof (struct lang_identifier)
*************** extern tree lhd_tree_inlining_convert_pa
*** 87,92 ****
--- 88,94 ----
  #define LANG_HOOKS_PARSE_FILE		lhd_do_nothing_i
  #define LANG_HOOKS_CLEAR_BINDING_STACK	lhd_clear_binding_stack
  #define LANG_HOOKS_INIT_OPTIONS		hook_uint_uint_constcharptrptr_0
+ #define LANG_HOOKS_INITIALIZE_DIAGNOSTITCS lhd_initialize_diagnostics
  #define LANG_HOOKS_HANDLE_OPTION	hook_int_size_t_constcharptr_int_0
  #define LANG_HOOKS_MISSING_ARGUMENT	hook_bool_constcharptr_size_t_false
  #define LANG_HOOKS_POST_OPTIONS		lhd_post_options
*************** extern int lhd_tree_dump_type_quals (tre
*** 245,250 ****
--- 247,253 ----
    LANG_HOOKS_IDENTIFIER_SIZE, \
    LANG_HOOKS_TREE_SIZE, \
    LANG_HOOKS_INIT_OPTIONS, \
+   LANG_HOOKS_INITIALIZE_DIAGNOSTITCS, \
    LANG_HOOKS_HANDLE_OPTION, \
    LANG_HOOKS_MISSING_ARGUMENT, \
    LANG_HOOKS_POST_OPTIONS, \
Index: langhooks.c
===================================================================
RCS file: /cvs/gcc/gcc/gcc/langhooks.c,v
retrieving revision 1.47
diff -p -r1.47 langhooks.c
*** langhooks.c	19 Jul 2003 14:47:07 -0000	1.47
--- langhooks.c	3 Aug 2003 22:09:56 -0000
*************** write_global_declarations (void)
*** 479,482 ****
--- 479,488 ----
    free (vec);
  }
  
+ /* Called to perform language-specific initialization of CTX.  */
+ void
+ lhd_initialize_diagnostics (struct diagnostic_context *ctx ATTRIBUTE_UNUSED)
+ {
+ }
+ 
  #include "gt-langhooks.h"
Index: langhooks.h
===================================================================
RCS file: /cvs/gcc/gcc/gcc/langhooks.h,v
retrieving revision 1.67
diff -p -r1.67 langhooks.h
*** langhooks.h	31 Jul 2003 19:26:16 -0000	1.67
--- langhooks.h	3 Aug 2003 22:09:56 -0000
*************** struct lang_hooks
*** 202,207 ****
--- 202,211 ----
       the language mask to filter the switch array with.  */
    unsigned int (*init_options) (unsigned int argc, const char **argv);
  
+   /* Callback used to perform language-specific initialization for the
+      global diagnostic context structure.  */
+   void (*initialize_diagnostics) (struct diagnostic_context *);
+ 
    /* Handle the switch CODE, which has real type enum opt_code from
       options.h.  If the switch takes an argument, it is passed in ARG
       which points to permanent storage.  The handler is responsible for
Index: opts.c
===================================================================
RCS file: /cvs/gcc/gcc/gcc/opts.c,v
retrieving revision 1.33
diff -p -r1.33 opts.c
*** opts.c	31 Jul 2003 19:26:16 -0000	1.33
--- opts.c	3 Aug 2003 22:09:57 -0000
*************** decode_options (unsigned int argc, const
*** 460,465 ****
--- 460,467 ----
    /* Perform language-specific options initialization.  */
    lang_mask = (*lang_hooks.init_options) (argc, argv);
  
+   lang_hooks.initialize_diagnostics (global_dc);
+ 
    /* Scan to see what optimization level has been specified.  That will
       determine the default value of many flags.  */
    for (i = 1; i < argc; i++)