1 # duplocale.m4 serial 3
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 $ac_cv_func_duplocale = yes; then
13 dnl Check against glibc bug where duplocale crashes.
14 dnl See <http://sourceware.org/bugzilla/show_bug.cgi?id=10969>.
15 dnl Also, on AIX 7.1, duplocale(LC_GLOBAL_LOCALE) returns (locale_t)0 with
16 dnl errno set to EINVAL.
17 AC_REQUIRE([gl_LOCALE_H])
18 AC_CACHE_CHECK([whether duplocale(LC_GLOBAL_LOCALE) works],
19 [gl_cv_func_duplocale_works],
27 if (duplocale (LC_GLOBAL_LOCALE) == (locale_t)0)
30 }], [gl_cv_func_duplocale_works=yes], [gl_cv_func_duplocale_works=no],
31 [dnl Guess it works except on glibc < 2.12 and AIX.
33 aix*) gl_cv_func_duplocale_works="guessing no";;
35 AC_EGREP_CPP([Unlucky GNU user], [
37 #ifdef __GNU_LIBRARY__
38 #if (__GLIBC__ == 2 && __GLIBC_MINOR__ < 12)
43 [gl_cv_func_duplocale_works="guessing no"],
44 [gl_cv_func_duplocale_works="guessing yes"])
46 *) gl_cv_func_duplocale_works="guessing yes";;
50 case "$gl_cv_func_duplocale_works" in
51 *no) REPLACE_DUPLOCALE=1 ;;
56 if test $REPLACE_DUPLOCALE = 1; then
58 AC_LIBOBJ([duplocale])
63 # Prerequisites of lib/duplocale.c.
64 AC_DEFUN([gl_PREREQ_DUPLOCALE],