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, 92 insertions, 0 deletions

diff --git a/gdb/yy-remap.h b/gdb/yy-remap.h
new file mode 100644
index 00000000000..71fa946b542
--- /dev/null
+++ b/gdb/yy-remap.h
@@ -0,0 +1,92 @@
+/* Copyright (C) 1986-2016 Free Software Foundation, Inc.
+
+   This file is part of GDB.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+/* 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.  */
+
+/* NOTE: This is clumsy since BISON and FLEX provide --prefix options.
+   We are maintaining it to accommodate systems without BISON.  */
+
+/* Define GDB_YY_REMAP_PREFIX to the desired remapping prefix before
+   including this file.  */
+#ifndef GDB_YY_REMAP_PREFIX
+# error "GDB_YY_REMAP_PREFIX not defined"
+#endif
+
+#define GDB_YY_REMAP_2(PREFIX, YYSYM) PREFIX ## YYSYM
+#define GDB_YY_REMAP_1(PREFIX, YYSYM) GDB_YY_REMAP_2 (PREFIX, YYSYM)
+#define GDB_YY_REMAP(YYSYM) GDB_YY_REMAP_1 (GDB_YY_REMAP_PREFIX, YYSYM)
+
+#define yymaxdepth	GDB_YY_REMAP (yymaxdepth)
+#define yyparse		GDB_YY_REMAP (yyparse)
+#define yylex		GDB_YY_REMAP (yylex)
+#define yyerror		GDB_YY_REMAP (yyerror)
+#define yylval		GDB_YY_REMAP (yylval)
+#define yychar		GDB_YY_REMAP (yychar)
+#define yydebug		GDB_YY_REMAP (yydebug)
+#define yypact		GDB_YY_REMAP (yypact)
+#define yyr1		GDB_YY_REMAP (yyr1)
+#define yyr2		GDB_YY_REMAP (yyr2)
+#define yydef		GDB_YY_REMAP (yydef)
+#define yychk		GDB_YY_REMAP (yychk)
+#define yypgo		GDB_YY_REMAP (yypgo)
+#define yyact		GDB_YY_REMAP (yyact)
+#define yyexca		GDB_YY_REMAP (yyexca)
+#define yyerrflag	GDB_YY_REMAP (yyerrflag)
+#define yynerrs		GDB_YY_REMAP (yynerrs)
+#define yyps		GDB_YY_REMAP (yyps)
+#define yypv		GDB_YY_REMAP (yypv)
+#define yys		GDB_YY_REMAP (yys)
+#define yy_yys		GDB_YY_REMAP (yy_yys)
+#define yystate		GDB_YY_REMAP (yystate)
+#define yytmp		GDB_YY_REMAP (yytmp)
+#define yyv		GDB_YY_REMAP (yyv)
+#define yy_yyv		GDB_YY_REMAP (yy_yyv)
+#define yyval		GDB_YY_REMAP (yyval)
+#define yylloc		GDB_YY_REMAP (yylloc)
+#define yyreds		GDB_YY_REMAP (yyreds)  /* With YYDEBUG defined */
+#define yytoks		GDB_YY_REMAP (yytoks)  /* With YYDEBUG defined */
+#define yyname		GDB_YY_REMAP (yyname)  /* With YYDEBUG defined */
+#define yyrule		GDB_YY_REMAP (yyrule)  /* With YYDEBUG defined */
+#define yylhs		GDB_YY_REMAP (yylhs)
+#define yylen		GDB_YY_REMAP (yylen)
+#define yydefred	GDB_YY_REMAP (yydefred)
+#define yydgoto		GDB_YY_REMAP (yydgoto)
+#define yysindex	GDB_YY_REMAP (yysindex)
+#define yyrindex	GDB_YY_REMAP (yyrindex)
+#define yygindex	GDB_YY_REMAP (yygindex)
+#define yytable		GDB_YY_REMAP (yytable)
+#define yycheck		GDB_YY_REMAP (yycheck)
+#define yyss		GDB_YY_REMAP (yyss)
+#define yysslim		GDB_YY_REMAP (yysslim)
+#define yyssp		GDB_YY_REMAP (yyssp)
+#define yystacksize	GDB_YY_REMAP (yystacksize)
+#define yyvs		GDB_YY_REMAP (yyvs)
+#define yyvsp		GDB_YY_REMAP (yyvsp)
+
+/* The following are common to all parsers.  */
+
+#ifndef YYDEBUG
+# define YYDEBUG 1  /* Default to yydebug support */
+#endif
+
+#define YYFPRINTF parser_fprintf