2 dnl Copyright (C) 2006 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 dnl Persuade glibc <wchar.h> to declare wcwidth().
10 AC_REQUIRE([AC_GNU_SOURCE])
12 AC_REQUIRE([AC_C_INLINE])
13 AC_REQUIRE([gt_TYPE_WCHAR_T])
15 AC_CHECK_HEADERS_ONCE([wchar.h wctype.h])
16 AC_CHECK_FUNCS_ONCE([iswprint wcwidth])
18 AC_CACHE_CHECK([whether wcwidth is declared], [ac_cv_have_decl_wcwidth],
19 [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([
20 /* AIX 3.2.5 declares wcwidth in <string.h>. */
29 char *p = (char *) wcwidth;
31 ])], [ac_cv_have_decl_wcwidth=yes], [ac_cv_have_decl_wcwidth=no])])
32 if test $ac_cv_have_decl_wcwidth = yes; then
37 AC_DEFINE_UNQUOTED([HAVE_DECL_WCWIDTH], [$ac_val],
38 [Define to 1 if you have the declaration of wcwidth(), and to 0