2 dnl Copyright (C) 2011 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_ISWBLANK],
9 AC_REQUIRE([gl_WCTYPE_H_DEFAULTS])
10 AC_REQUIRE([gl_WCTYPE_H])
11 dnl Persuade glibc <wctype.h> to declare iswblank().
12 AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
13 AC_CHECK_FUNCS_ONCE([iswblank])
14 AC_CHECK_DECLS([iswblank], , , [[
15 /* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
17 BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be included
25 if test $ac_cv_func_iswblank = no; then
27 if test $ac_cv_have_decl_iswblank = yes; then
31 if test $HAVE_ISWCNTRL = 0 || test $REPLACE_ISWCNTRL = 1; then
32 dnl Redefine all of iswcntrl, ..., towupper in <wctype.h>.
35 if test $HAVE_ISWBLANK = 0 || test $REPLACE_ISWBLANK = 1; then
36 dnl Redefine only iswblank.