3 dnl Copyright (C) 2008-2024 Free Software Foundation, Inc.
4 dnl This file is free software; the Free Software Foundation
5 dnl gives unlimited permission to copy and/or distribute it,
6 dnl with or without modifications, as long as this notice is preserved.
8 AC_DEFUN([gl_FUNC_WCTOB],
10 AC_REQUIRE([gl_WCHAR_H_DEFAULTS])
12 AC_CHECK_FUNCS_ONCE([wctob])
13 if test $ac_cv_func_wctob = no; then
19 dnl Solaris 9 has the wctob() function but it does not work.
20 dnl Cygwin 1.7.2 has the wctob() function but it clobbers caller-owned
21 dnl registers, see <https://cygwin.com/ml/cygwin/2010-05/msg00015.html>.
22 AC_REQUIRE([AC_PROG_CC])
23 AC_REQUIRE([gt_LOCALE_FR])
24 AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
25 AC_CACHE_CHECK([whether wctob works],
26 [gl_cv_func_wctob_works],
28 dnl Initial guess, used when cross-compiling or when no suitable locale
32 # Guess no on Solaris <= 9 and Cygwin.
33 solaris2.[1-9] | solaris2.[1-9].* | cygwin*)
34 gl_cv_func_wctob_works="guessing no" ;;
35 # Guess no on native Windows.
37 gl_cv_func_wctob_works="guessing no" ;;
38 # Guess yes otherwise.
39 *) gl_cv_func_wctob_works="guessing yes" ;;
49 register long global __asm__ ("%ebx");
53 setlocale (LC_ALL, "en_US.UTF-8");
56 if (wctob (0x00FC) != -1)
58 if (global != 0x12345678)
63 [gl_cv_func_wctob_works=no],
67 if test "$gl_cv_func_wctob_works" != no && test $LOCALE_FR != none; then
75 if (setlocale (LC_ALL, "$LOCALE_FR") != NULL)
79 if (mbtowc (&wc, "\374", 1) == 1)
80 if (wctob (wc) != (unsigned char) '\374')
85 [gl_cv_func_wctob_works=yes],
86 [gl_cv_func_wctob_works=no],
90 case "$gl_cv_func_wctob_works" in
94 if test $REPLACE_WCTOB = 0; then
96 dnl IRIX 6.5 has the wctob() function but does not declare it.
97 AC_CHECK_DECLS([wctob], [], [], [[
100 if test $ac_cv_have_decl_wctob != yes; then
107 # Prerequisites of lib/wctob.c.
108 AC_DEFUN([gl_PREREQ_WCTOB], [