| # 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 |
| ]) |
