m4/bison-i18n.m4

   1 # bison-i18n.m4 serial 2
   2 dnl Copyright (C) 2005-2006, 2009-2010 Free Software Foundation, Inc.
   3 dnl This file is free software; the Free Software Foundation
   4 dnl gives unlimited permission to copy and/or distribute it,
   5 dnl with or without modifications, as long as this notice is preserved.
   6
   7 dnl From Bruno Haible.
   8
   9 dnl Support for internationalization of bison-generated parsers.
  10
  11 dnl BISON_I18N
  12 dnl should be used in configure.ac, after AM_GNU_GETTEXT. If USE_NLS is yes, it
  13 dnl sets BISON_LOCALEDIR to indicate where to find the bison-runtime.mo files
  14 dnl and defines YYENABLE_NLS if there are bison-runtime.mo files at all.
  15 AC_DEFUN([BISON_I18N],
  16 [
  17   if test -z "$USE_NLS"; then
  18     echo "The BISON-I18N macro is used without being preceded by AM-GNU-GETTEXT." 1>&2
  19     exit 1
  20   fi
  21   BISON_LOCALEDIR=
  22   BISON_USE_NLS=no
  23   if test "$USE_NLS" = yes; then
  24     dnl Determine bison's localedir.
  25     dnl AC_PROG_YACC sets the YACC variable; other macros set the BISON variable.
  26     dnl But even is YACC is called "yacc", it may be a script that invokes bison
  27     dnl and accepts the --print-localedir option.
  28     dnl YACC's default value is empty; BISON's default value is :.
  29     if (${YACC-${BISON-:}} --print-localedir) >/dev/null 2>&1; then
  30       BISON_LOCALEDIR=`${YACC-${BISON-:}} --print-localedir`
  31     fi
  32     AC_SUBST([BISON_LOCALEDIR])
  33     if test -n "$BISON_LOCALEDIR"; then
  34       dnl There is no need to enable internationalization if the user doesn't
  35       dnl want message catalogs.  So look at the language/locale names for
  36       dnl which the user wants message catalogs.  This is $LINGUAS.  If unset
  37       dnl or empty, he wants all of them.
  38       USER_LINGUAS="${LINGUAS-%UNSET%}"
  39       if test -n "$USER_LINGUAS"; then
  40         BISON_USE_NLS=yes
  41       fi
  42     fi
  43   fi
  44   if test $BISON_USE_NLS = yes; then
  45     AC_DEFINE([YYENABLE_NLS], 1,
  46       [Define to 1 to internationalize bison runtime messages.])
  47   fi
  48 ])