1 # bison-i18n.m4 serial 4
2 dnl Copyright (C) 2005-2006, 2009-2020 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.
9 dnl Support for internationalization of bison-generated parsers.
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],
17 if test -z "$USE_NLS"; then
18 echo "The BISON-I18N macro is used without being preceded by AM-GNU-GETTEXT." | sed -e 's/-/_/g' 1>&2
23 if test "$USE_NLS" = yes; then
24 dnl Determine bison's localedir.
25 dnl Generally, accept an option --with-bison-prefix=PREFIX to indicate where
26 dnl find bison's runtime data. Additionally, for users who have installed
27 dnl bison in user directories, query the 'bison' program found in $PATH
28 dnl (but not when cross-compiling).
29 dnl Usually ${prefix}/share/locale, but can be influenced by the configure
30 dnl options --datarootdir and --localedir.
31 BISON_LOCALEDIR="${localedir}"
32 AC_ARG_WITH([bison-prefix],
33 [[ --with-bison-prefix=DIR search for bison's runtime data in DIR/share]],
34 [if test "X$withval" != "X" && test "X$withval" != "Xno"; then
35 BISON_LOCALEDIR="$withval/share/locale"
38 if test $cross_compiling != yes; then
39 dnl AC_PROG_YACC sets the YACC variable; other macros set the BISON
40 dnl variable. But even is YACC is called "yacc", it may be a script that
41 dnl invokes bison and accepts the --print-localedir option.
42 dnl YACC's default value is empty; BISON's default value is :.
43 if (${YACC-${BISON-:}} --print-localedir) >/dev/null 2>&1; then
44 BISON_LOCALEDIR=`${YACC-${BISON-:}} --print-localedir`
47 if test -n "$BISON_LOCALEDIR"; then
48 dnl There is no need to enable internationalization if the user doesn't
49 dnl want message catalogs. So look at the language/locale names for
50 dnl which the user wants message catalogs. This is $LINGUAS. If unset,
51 dnl he wants all of them; if non-empty, he wants some of them.
52 USER_LINGUAS="${LINGUAS-%UNSET%}"
53 if test -n "$USER_LINGUAS"; then
57 AC_SUBST([BISON_LOCALEDIR])
59 if test $BISON_USE_NLS = yes; then
60 AC_DEFINE([YYENABLE_NLS], [1],
61 [Define to 1 to internationalize bison runtime messages.])