# poll_h.m4 serial 2

dnl Copyright (C) 2010-2018 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.

dnl Written by Bruno Haible.

AC_DEFUN([gl_POLL_H],

[

  dnl Use AC_REQUIRE here, so that the default behavior below is expanded

  dnl once only, before all statements that occur in other macros.

  AC_REQUIRE([gl_POLL_H_DEFAULTS])

  AC_CHECK_HEADERS_ONCE([poll.h])

  if test $ac_cv_header_poll_h = yes; then

    HAVE_POLL_H=1

  else

    HAVE_POLL_H=0

  fi

  AC_SUBST([HAVE_POLL_H])

  dnl <poll.h> is always overridden, because of GNULIB_POSIXCHECK.

  gl_CHECK_NEXT_HEADERS([poll.h])

  dnl Check for declarations of anything we want to poison if the

  dnl corresponding gnulib module is not in use.

  gl_WARN_ON_USE_PREPARE([[#include <poll.h>]],

    [poll])

])

AC_DEFUN([gl_POLL_MODULE_INDICATOR],

[

  dnl Use AC_REQUIRE here, so that the default settings are expanded once only.

  AC_REQUIRE([gl_POLL_H_DEFAULTS])

  gl_MODULE_INDICATOR_SET_VARIABLE([$1])

  dnl Define it also as a C macro, for the benefit of the unit tests.

  gl_MODULE_INDICATOR_FOR_TESTS([$1])

])

AC_DEFUN([gl_POLL_H_DEFAULTS],

[

  GNULIB_POLL=0;        AC_SUBST([GNULIB_POLL])

  dnl Assume proper GNU behavior unless another module says otherwise.

  HAVE_POLL=1;          AC_SUBST([HAVE_POLL])

  REPLACE_POLL=0;       AC_SUBST([REPLACE_POLL])

])