(YYSTACKEXPANDABLE): Do not evaluate

YYSTYPE_IS_TRIVIAL or YYSTYPE_IS_TRIVIAL unless they are defined.
This fixes a problem reported by John Bowman when the Compaq/HP
Alpha cxx compiler happy (e.g. using cxx -D__USE_STD_IOSTREAM
-ansi -Wall -gall).

diff --git a/data/glr.c b/data/glr.c
index d04edbd..173d8c2 100644 (file)
--- a/data/glr.c
+++ b/data/glr.c
@@ -510,7 +510,8 @@ int yydebug;
 
 #if (! defined (YYSTACKEXPANDABLE) \
      && (! defined (__cplusplus) \
-        || (]b4_location_if([YYLTYPE_IS_TRIVIAL && ])[YYSTYPE_IS_TRIVIAL)))
+        || (]b4_location_if([[defined (YYLTYPE_IS_TRIVIAL) && YYLTYPE_IS_TRIVIAL \
+            && ]])[defined (YYSTYPE_IS_TRIVIAL) && YYSTYPE_IS_TRIVIAL)))
 #define YYSTACKEXPANDABLE 1
 #else
 #define YYSTACKEXPANDABLE 0