m4/bison-i18n.m4

   1 # bison-i18n.m4 serial 2
   2
   3 dnl Copyright (C) 2005-2006, 2009-2011 Free Software Foundation, Inc.
   4
   5 dnl This file is free software; the Free Software Foundation
   6 dnl gives unlimited permission to copy and/or distribute it,
   7 dnl with or without modifications, as long as this notice is preserved.
   8
   9 dnl From Bruno Haible.
  10
  11 dnl Support for internationalization of bison-generated parsers.
  12
  13 dnl BISON_I18N
  14 dnl should be used in configure.ac, after AM_GNU_GETTEXT. If USE_NLS is yes, it
  15 dnl sets BISON_LOCALEDIR to indicate where to find the bison-runtime.mo files
  16 dnl and defines YYENABLE_NLS if there are bison-runtime.mo files at all.
  17 AC_DEFUN([BISON_I18N],
  18 [
  19   if test -z "$USE_NLS"; then
  20     echo "The BISON-I18N macro is used without being preceded by AM-GNU-GETTEXT." 1>&2
  21     exit 1
  22   fi
  23   BISON_LOCALEDIR=
  24   BISON_USE_NLS=no
  25   if test "$USE_NLS" = yes; then
  26     dnl Determine bison's localedir.
  27     dnl AC_PROG_YACC sets the YACC variable; other macros set the BISON variable.
  28     dnl But even is YACC is called "yacc", it may be a script that invokes bison
  29     dnl and accepts the --print-localedir option.
  30     dnl YACC's default value is empty; BISON's default value is :.
  31     if (${YACC-${BISON-:}} --print-localedir) >/dev/null 2>&1; then
  32       BISON_LOCALEDIR=`${YACC-${BISON-:}} --print-localedir`
  33     fi
  34     AC_SUBST([BISON_LOCALEDIR])
  35     if test -n "$BISON_LOCALEDIR"; then
  36       dnl There is no need to enable internationalization if the user doesn't
  37       dnl want message catalogs.  So look at the language/locale names for
  38       dnl which the user wants message catalogs.  This is $LINGUAS.  If unset
  39       dnl or empty, he wants all of them.
  40       USER_LINGUAS="${LINGUAS-%UNSET%}"
  41       if test -n "$USER_LINGUAS"; then
  42         BISON_USE_NLS=yes
  43       fi
  44     fi
  45   fi
  46   if test $BISON_USE_NLS = yes; then
  47     AC_DEFINE([YYENABLE_NLS], 1,
  48       [Define to 1 to internationalize bison runtime messages.])
  49   fi
  50 ])