1 # duplocale.m4 serial 2
2 dnl Copyright (C) 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.
7 AC_DEFUN([gl_FUNC_DUPLOCALE],
9 AC_REQUIRE([gl_LOCALE_H_DEFAULTS])
10 AC_REQUIRE([AC_CANONICAL_HOST])
11 AC_CHECK_FUNCS_ONCE([duplocale])
12 if test $ac_cv_func_duplocale = yes; then
13 dnl Check against glibc bug where duplocale crashes.
14 dnl See <http://sourceware.org/bugzilla/show_bug.cgi?id=10969>.
15 AC_REQUIRE([gl_LOCALE_H])
16 AC_CACHE_CHECK([whether duplocale(LC_GLOBAL_LOCALE) works],
17 [gl_cv_func_duplocale_works],
25 (void) duplocale (LC_GLOBAL_LOCALE);
27 }], [gl_cv_func_duplocale_works=yes], [gl_cv_func_duplocale_works=no],
28 [dnl Guess it works except on glibc < 2.12.
29 AC_EGREP_CPP([Unlucky GNU user], [
31 #ifdef __GNU_LIBRARY__
32 #if (__GLIBC__ == 2 && __GLIBC_MINOR__ < 12)
37 [gl_cv_func_duplocale_works="guessing no"],
38 [gl_cv_func_duplocale_works="guessing yes"])
41 case "$gl_cv_func_duplocale_works" in
42 *no) REPLACE_DUPLOCALE=1 ;;
47 if test $REPLACE_DUPLOCALE = 1; then
49 AC_LIBOBJ([duplocale])
54 # Prerequisites of lib/duplocale.c.
55 AC_DEFUN([gl_PREREQ_DUPLOCALE],