* configure.in (AC_PROG_YACC): AC_DEFINE(OLD_YACC) if Yacc is found

  instead of Bison or byacc.

* parse.y: If OLD_YACC is defined, ensure that YYMAXDEPTH is at least
  10000 (Bison's default) since some old versions of Yacc define it as
  low as 150 by default, which is too low for Ruby to parse some files,
  such as date/format.rb.  Among other issues, the parse problem causes
  "make test" to fail.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@5093 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -40,6 +40,17 @@ Tue Dec  2 21:31:42 2003  Nobuyoshi Nakada  <nobu.nakada@nifty.ne.jp>
 
 	* test/runner.rb: exit with the test result.
 
+Tue Dec  2 20:18:48 2003  Eric Sunshine <sunshine@sunshineco.com>
+
+	* configure.in (AC_PROG_YACC): AC_DEFINE(OLD_YACC) if Yacc is found
+	  instead of Bison or byacc.
+
+	* parse.y: If OLD_YACC is defined, ensure that YYMAXDEPTH is at least
+	  10000 (Bison's default) since some old versions of Yacc define it as
+	  low as 150 by default, which is too low for Ruby to parse some files,
+	  such as date/format.rb.  Among other issues, the parse problem causes
+	  "make test" to fail.
+
 Tue Dec  2 20:03:20 2003  Minero Aoki  <aamine@loveruby.net>
 
 	* test/fileutils/test_fileutils.rb: check if Pathnames are usable

configure.in

@@ -157,6 +157,10 @@ AC_SUBST(OUTFLAG)
 RUBY_MINGW32
 
 AC_PROG_YACC
+if test "$YACC" = "yacc"; then
+  AC_DEFINE([OLD_YACC])
+fi
+
 AC_CHECK_TOOL(RANLIB, ranlib, :)
 AC_CHECK_TOOL(AR, ar)
 if test -z "$AR"; then

defines.h

@@ -180,7 +180,7 @@ flush_register_windows(void)
 #define PATH_ENV "PATH"
 #endif
 
-#if defined(DOSISH) && !defined(__human68k__)
+#if defined(DOSISH) && !defined(__human68k__) && !defined(__EMX__)
 #define ENV_IGNORECASE
 #endif
 

parse.y

@@ -177,6 +177,15 @@ static void top_local_setup();
 #define nd_paren(node) (char)((node)->u2.id >> CHAR_BIT*2)
 #define nd_nest u3.id
 
+/* Older versions of Yacc set YYMAXDEPTH to a very low value by default (150,
+   for instance).  This is too low for Ruby to parse some files, such as
+   date/format.rb, therefore bump the value up to at least Bison's default. */
+#ifdef OLD_YACC
+#ifndef YYMAXDEPTH
+#define YYMAXDEPTH 10000
+#endif
+#endif
+
 %}
 
 %union {