2 dnl Copyright (C) 2009-2021 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_ONCE([gl_CTYPE_H],
9 AC_REQUIRE([gl_CTYPE_H_DEFAULTS])
11 dnl <ctype.h> is always overridden, because of GNULIB_POSIXCHECK.
12 gl_NEXT_HEADERS([ctype.h])
14 dnl Check for declarations of anything we want to poison if the
15 dnl corresponding gnulib module is not in use.
16 gl_WARN_ON_USE_PREPARE([[#include <ctype.h>
20 # gl_CTYPE_MODULE_INDICATOR([modulename])
21 # sets the shell variable that indicates the presence of the given module
22 # to a C preprocessor expression that will evaluate to 1.
23 # This macro invocation must not occur in macros that are AC_REQUIREd.
24 AC_DEFUN([gl_CTYPE_MODULE_INDICATOR],
26 dnl Ensure to expand the default settings once only.
27 gl_CTYPE_H_REQUIRE_DEFAULTS
28 gl_MODULE_INDICATOR_SET_VARIABLE([$1])
31 # Initializes the default values for AC_SUBSTed shell variables.
32 # This macro must not be AC_REQUIREd. It must only be invoked, and only
33 # outside of macros or in macros that are not AC_REQUIREd.
34 AC_DEFUN([gl_CTYPE_H_REQUIRE_DEFAULTS],
36 m4_defun(GL_MODULE_INDICATOR_PREFIX[_CTYPE_H_MODULE_INDICATOR_DEFAULTS], [
37 gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_ISBLANK])
39 m4_require(GL_MODULE_INDICATOR_PREFIX[_CTYPE_H_MODULE_INDICATOR_DEFAULTS])
40 AC_REQUIRE([gl_CTYPE_H_DEFAULTS])
43 AC_DEFUN([gl_CTYPE_H_DEFAULTS],
45 dnl Assume proper GNU behavior unless another module says otherwise.
46 HAVE_ISBLANK=1; AC_SUBST([HAVE_ISBLANK])