blob: e77e1a87302a38671798d047ea2163d12f543253 [file] [log] [blame]
# isblank.m4 serial 3
dnl Copyright (C) 2009-2021 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
AC_DEFUN([gl_FUNC_ISBLANK],
[
dnl Persuade glibc <ctype.h> to declare isblank().
AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
AC_REQUIRE([gl_CTYPE_H_DEFAULTS])
AC_CHECK_FUNCS_ONCE([isblank])
if test $ac_cv_func_isblank = no; then
HAVE_ISBLANK=0
fi
])