Centralize yacc interface names remapping (yyparse, yylex, yyerror, etc)

This factors out all the yy-variables remapping to a single file,
instead of each parser having to do the same, with different prefixes.

With this, a parser just needs to define the prefix they want and
include yy-remap.h, which does the dirty job.

Note this renames the c_error, ada_error, etc. functions.  Writing the
remapping pattern as:

 #define yyerror GDB_YY_REMAP (error)

instead of:

 #define yyerror GDB_YY_REMAP (yyerror)

would have avoided the renaming.  However, that would be problematic
if we have a macro 'foo' in scope, when we write:

 #define yyfoo GDB_YY_REMAP (foo)

as that would expand 'foo'.

The c_yyerror etc. naming end ups indicating that this is a yacc
related function more clearly, so feels like a good change, anyway.

gdb/ChangeLog:
2016-04-22  Pedro Alves  <palves@redhat.com>

	* ada-exp.y: Remove all yy symbol remappings.
	(GDB_YY_REMAP_PREFIX): Define.
	Include "yy-remap.h".
	* ada-lang.c (ada_language_defn): Adjust.
	* ada-lang.h (ada_error): Rename to ...
	(ada_yyerror): ... this.
	* c-exp.y: Remove all yy symbol remappings.
	(GDB_YY_REMAP_PREFIX): Define.
	Include "yy-remap.h".
	* c-lang.c (c_language_defn, cplus_language_defn)
	(asm_language_defn, minimal_language_defn): Adjust.
	* c-lang.h (c_error): Rename to ...
	(c_yyerror): ... this.
	* d-exp.y: Remove all yy symbol remappings.
	(GDB_YY_REMAP_PREFIX): Define.
	Include "yy-remap.h".
	* d-lang.c (d_language_defn): Adjust.
	* d-lang.h (d_error): Rename to ...
	(d_yyerror): ... this.
	* f-exp.y: Remove all yy symbol remappings.
	(GDB_YY_REMAP_PREFIX): Define.
	Include "yy-remap.h".
	* f-lang.c (f_language_defn): Adjust.
	* f-lang.h (f_error): Rename to ...
	(f_yyerror): ... this.
	* go-exp.y: Remove all yy symbol remappings.
	(GDB_YY_REMAP_PREFIX): Define.
	Include "yy-remap.h".
	* go-lang.c (go_language_defn): Adjust.
	* go-lang.h (go_error): Rename to ...
	(go_yyerror): ... this.
	* jv-exp.y: Remove all yy symbol remappings.
	(GDB_YY_REMAP_PREFIX): Define.
	Include "yy-remap.h".
	* jv-lang.c (java_language_defn): Adjust.
	* jv-lang.h (java_error): Rename to ...
	(java_yyerror): ... this.
	* m2-exp.y: Remove all yy symbol remappings.
	(GDB_YY_REMAP_PREFIX): Define.
	Include "yy-remap.h".
	* m2-lang.c (m2_language_defn): Adjust.
	* m2-lang.h (m2_error): Rename to ...
	(m2_yyerror): ... this.
	* objc-exp.y: Remove all yy symbol remappings.
	(GDB_YY_REMAP_PREFIX): Define.
	Include "yy-remap.h".
	* objc-lang.c (objc_language_defn): Adjust.
	* opencl-lang.c (opencl_language_defn): Adjust.
	* p-exp.y: Remove all yy symbol remappings.
	(GDB_YY_REMAP_PREFIX): Define.
	Include "yy-remap.h".
	* p-lang.c (pascal_language_defn): Adjust.
	* p-lang.h (pascal_error): Rename to ...
	(pascal_yyerror): ... this.
	* yy-remap.h: New file.

1 files changed, 4 insertions, 59 deletions

diff --git a/gdb/c-exp.y b/gdb/c-exp.y
index 9f2a229..29f672f 100644
--- a/gdb/c-exp.y
+++ b/gdb/c-exp.y
@@ -56,65 +56,10 @@
 
 #define parse_type(ps) builtin_type (parse_gdbarch (ps))
 
-/* Remap normal yacc parser interface names (yyparse, yylex, yyerror, etc),
-   as well as gratuitiously global symbol names, so we can have multiple
-   yacc generated parsers in gdb.  Note that these are only the variables
-   produced by yacc.  If other parser generators (bison, byacc, etc) produce
-   additional global names that conflict at link time, then those parser
-   generators need to be fixed instead of adding those names to this list. */
-
-#define	yymaxdepth c_maxdepth
-#define	yyparse	c_parse_internal
-#define	yylex	c_lex
-#define	yyerror	c_error
-#define	yylval	c_lval
-#define	yychar	c_char
-#define	yydebug	c_debug
-#define	yypact	c_pact	
-#define	yyr1	c_r1			
-#define	yyr2	c_r2			
-#define	yydef	c_def		
-#define	yychk	c_chk		
-#define	yypgo	c_pgo		
-#define	yyact	c_act		
-#define	yyexca	c_exca
-#define yyerrflag c_errflag
-#define yynerrs	c_nerrs
-#define	yyps	c_ps
-#define	yypv	c_pv
-#define	yys	c_s
-#define	yy_yys	c_yys
-#define	yystate	c_state
-#define	yytmp	c_tmp
-#define	yyv	c_v
-#define	yy_yyv	c_yyv
-#define	yyval	c_val
-#define	yylloc	c_lloc
-#define yyreds	c_reds		/* With YYDEBUG defined */
-#define yytoks	c_toks		/* With YYDEBUG defined */
-#define yyname	c_name		/* With YYDEBUG defined */
-#define yyrule	c_rule		/* With YYDEBUG defined */
-#define yylhs	c_yylhs
-#define yylen	c_yylen
-#define yydefred c_yydefred
-#define yydgoto	c_yydgoto
-#define yysindex c_yysindex
-#define yyrindex c_yyrindex
-#define yygindex c_yygindex
-#define yytable	 c_yytable
-#define yycheck	 c_yycheck
-#define yyss	c_yyss
-#define yysslim	c_yysslim
-#define yyssp	c_yyssp
-#define yystacksize c_yystacksize
-#define yyvs	c_yyvs
-#define yyvsp	c_yyvsp
-
-#ifndef YYDEBUG
-#define	YYDEBUG 1		/* Default to yydebug support */
-#endif
-
-#define YYFPRINTF parser_fprintf
+/* Remap normal yacc parser interface names (yyparse, yylex, yyerror,
+   etc).  */
+#define GDB_YY_REMAP_PREFIX c_
+#include "yy-remap.h"
 
 /* The state of the parser, used internally when we are parsing the
    expression.  */