[PATCH] m4/bison-i18n.m4: add --with-bisonlocaledir to assign BISON_LOCALEDIR

[Hongxu Jia]

The variable BISON_LOCALEDIR is assigned only by the output of
'bison --print-localedir', we add option --with-bisonlocaledir
to assign it explicitly. It is helpful for user to split the
native compile and cross compile.

For backward compatibility, if option not used, it still
make use of the output of 'bison --print-localedir'.

Signed-off-by: Hongxu Jia <address@hidden>
---
 m4/bison-i18n.m4 | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/m4/bison-i18n.m4 b/m4/bison-i18n.m4
index 8e57caf..f74187a 100644
--- a/m4/bison-i18n.m4
+++ b/m4/bison-i18n.m4
@@ -16,11 +16,16 @@ dnl sets BISON_LOCALEDIR to indicate where to find the 
bison-runtime.mo files
 dnl and defines YYENABLE_NLS if there are bison-runtime.mo files at all.
 AC_DEFUN([BISON_I18N],
 [
+  dnl Default is not to set bisonlocaledir
+  AC_ARG_WITH([bisonlocaledir],
+    [  --with-bisonlocaledir   sets BISON_LOCALEDIR to indicate where to find 
the bison-runtime.mo files],
+    BISON_LOCALEDIR=$withval,
+    BISON_LOCALEDIR=)
+
   if test -z "$USE_NLS"; then
     echo "The BISON-I18N macro is used without being preceded by 
AM-GNU-GETTEXT." 1>&2
     exit 1
   fi
-  BISON_LOCALEDIR=
   BISON_USE_NLS=no
   if test "$USE_NLS" = yes; then
     dnl Determine bison's localedir.
@@ -28,9 +33,10 @@ AC_DEFUN([BISON_I18N],
     dnl But even is YACC is called "yacc", it may be a script that invokes 
bison
     dnl and accepts the --print-localedir option.
     dnl YACC's default value is empty; BISON's default value is :.
-    if (${YACC-${BISON-:}} --print-localedir) >/dev/null 2>&1; then
+    if test -z "$BISON_LOCALEDIR" -a ${YACC-${BISON-:}} --print-localedir 
>/dev/null 2>&1; then
       BISON_LOCALEDIR=`${YACC-${BISON-:}} --print-localedir`
     fi
+    AC_MSG_RESULT([$BISON_LOCALEDIR])
     AC_SUBST([BISON_LOCALEDIR])
     if test -n "$BISON_LOCALEDIR"; then
       dnl There is no need to enable internationalization if the user doesn't
-- 
1.9.1