2 dnl Copyright (C) 2006-2010 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_WCWIDTH],
9 AC_REQUIRE([gl_WCHAR_H_DEFAULTS])
10 AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
12 dnl Persuade glibc <wchar.h> to declare wcwidth().
13 AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
15 AC_REQUIRE([gt_TYPE_WCHAR_T])
16 AC_REQUIRE([gt_TYPE_WINT_T])
18 AC_CHECK_HEADERS_ONCE([wchar.h])
19 AC_CHECK_FUNCS_ONCE([wcwidth])
21 AC_CHECK_DECLS([wcwidth], [], [], [
22 /* AIX 3.2.5 declares wcwidth in <string.h>. */
24 /* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
26 BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be included
33 if test $ac_cv_have_decl_wcwidth != yes; then
37 if test $ac_cv_func_wcwidth = no; then
40 dnl On MacOS X 10.3, wcwidth(0x0301) (COMBINING ACUTE ACCENT) returns 1.
41 dnl On OSF/1 5.1, wcwidth(0x200B) (ZERO WIDTH SPACE) returns 1.
42 dnl This leads to bugs in 'ls' (coreutils).
43 AC_CACHE_CHECK([whether wcwidth works reasonably in UTF-8 locales],
44 [gl_cv_func_wcwidth_works],
48 /* AIX 3.2.5 declares wcwidth in <string.h>. */
50 /* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
52 BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be included
58 #if !HAVE_DECL_WCWIDTH
67 if (setlocale (LC_ALL, "fr_FR.UTF-8") != NULL)
68 if (wcwidth (0x0301) > 0 || wcwidth (0x200B) > 0)
71 }], [gl_cv_func_wcwidth_works=yes], [gl_cv_func_wcwidth_works=no],
75 # Guess yes on glibc systems.
76 *-gnu*) gl_cv_func_wcwidth_works="guessing yes";;
77 *) gl_cv_func_wcwidth_works="guessing no";;
82 case "$gl_cv_func_wcwidth_works" in
84 *no) REPLACE_WCWIDTH=1 ;;
87 if test $REPLACE_WCWIDTH = 1; then
91 if test $REPLACE_WCWIDTH = 1 || test $HAVE_DECL_WCWIDTH = 0; then