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# sys_wait_h.m4 serial 6
dnl Copyright (C) 2008-2013 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_SYS_WAIT_H],
[
  AC_REQUIRE([gl_SYS_WAIT_H_DEFAULTS])

  dnl <sys/wait.h> is always overridden, because of GNULIB_POSIXCHECK.
  gl_CHECK_NEXT_HEADERS([sys/wait.h])

  dnl Ensure the type pid_t gets defined.
  AC_REQUIRE([AC_TYPE_PID_T])

  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 <sys/wait.h>]],
    [waitpid])
])

AC_DEFUN([gl_SYS_WAIT_MODULE_INDICATOR],
[
  dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
  AC_REQUIRE([gl_SYS_WAIT_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_SYS_WAIT_H_DEFAULTS],
[
  GNULIB_WAITPID=0; AC_SUBST([GNULIB_WAITPID])
  dnl Assume proper GNU behavior unless another module says otherwise.
])