[PATCH 1/2] Check if YYENABLE_NLS is defined before checking its value

[Jonathan Nieder]

Avoid warnings like this one when users compile parsers:

        y.tab.c:383:6: warning: "YYENABLE_NLS" is not defined

It would not be sufficient to replace '#if YYENABLE_NLS' with
'#ifdef YYENABLE_NLS' because various projects currently define
YYENABLE_NLS to 0 to work around this warning.
---
 data/glr.c    |    2 +-
 data/lalr1.cc |    2 +-
 data/yacc.c   |    2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/data/glr.c b/data/glr.c
index 6f1f7ee..89bbd6f 100644
--- a/data/glr.c
+++ b/data/glr.c
@@ -256,7 +256,7 @@ b4_percent_code_get[]dnl
 #include <string.h>
 
 #ifndef YY_
-# if YYENABLE_NLS
+# if defined YYENABLE_NLS && YYENABLE_NLS
 #  if ENABLE_NLS
 #   include <libintl.h> /* INFRINGES ON USER NAME SPACE */
 #   define YY_(msgid) dgettext ("bison-runtime", msgid)
diff --git a/data/lalr1.cc b/data/lalr1.cc
index 1a2777e..9e0d522 100644
--- a/data/lalr1.cc
+++ b/data/lalr1.cc
@@ -398,7 +398,7 @@ m4_if(b4_prefix, [yy], [],
 b4_percent_code_get[]dnl
 
 [#ifndef YY_
-# if YYENABLE_NLS
+# if defined YYENABLE_NLS && YYENABLE_NLS
 #  if ENABLE_NLS
 #   include <libintl.h> /* FIXME: INFRINGES ON USER NAME SPACE */
 #   define YY_(msgid) dgettext ("bison-runtime", msgid)
diff --git a/data/yacc.c b/data/yacc.c
index ea2ae14..af38314 100644
--- a/data/yacc.c
+++ b/data/yacc.c
@@ -374,7 +374,7 @@ typedef short int yytype_int16;
 #define YYSIZE_MAXIMUM ((YYSIZE_T) -1)
 
 #ifndef YY_
-# if YYENABLE_NLS
+# if defined YYENABLE_NLS && YYENABLE_NLS
 #  if ENABLE_NLS
 #   include <libintl.h> /* INFRINGES ON USER NAME SPACE */
 #   define YY_(msgid) dgettext ("bison-runtime", msgid)
-- 
1.6.5.4