2 dnl Copyright (C) 2010-2011 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 dnl Written by Bruno Haible.
11 dnl Use AC_REQUIRE here, so that the default behavior below is expanded
12 dnl once only, before all statements that occur in other macros.
13 AC_REQUIRE([gl_POLL_H_DEFAULTS])
15 AC_CHECK_HEADERS_ONCE([poll.h])
16 if test $ac_cv_header_poll_h = yes; then
22 AC_SUBST([HAVE_POLL_H])
24 dnl <poll.h> is always overridden, because of GNULIB_POSIXCHECK.
25 gl_CHECK_NEXT_HEADERS([poll.h])
27 dnl Check for declarations of anything we want to poison if the
28 dnl corresponding gnulib module is not in use.
29 gl_WARN_ON_USE_PREPARE([[#include <poll.h>]],
33 dnl Unconditionally enables the replacement of <poll.h>.
34 AC_DEFUN([gl_REPLACE_POLL_H],
36 dnl This is a no-op, because <poll.h> is always overridden.
40 AC_DEFUN([gl_POLL_MODULE_INDICATOR],
42 dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
43 AC_REQUIRE([gl_POLL_H_DEFAULTS])
44 gl_MODULE_INDICATOR_SET_VARIABLE([$1])
45 dnl Define it also as a C macro, for the benefit of the unit tests.
46 gl_MODULE_INDICATOR_FOR_TESTS([$1])
49 AC_DEFUN([gl_POLL_H_DEFAULTS],
51 GNULIB_POLL=0; AC_SUBST([GNULIB_POLL])
52 dnl Assume proper GNU behavior unless another module says otherwise.
53 HAVE_POLL=1; AC_SUBST([HAVE_POLL])
54 REPLACE_POLL=0; AC_SUBST([REPLACE_POLL])