19e5b0d9eSJessica Clarke /*- 29e5b0d9eSJessica Clarke * SPDX-License-Identifier: BSD-2-Clause 39e5b0d9eSJessica Clarke * 49e5b0d9eSJessica Clarke * Copyright 2021 Jessica Clarke <jrtc27@FreeBSD.org> 59e5b0d9eSJessica Clarke * 69e5b0d9eSJessica Clarke * Redistribution and use in source and binary forms, with or without 79e5b0d9eSJessica Clarke * modification, are permitted provided that the following conditions 89e5b0d9eSJessica Clarke * are met: 99e5b0d9eSJessica Clarke * 1. Redistributions of source code must retain the above copyright 109e5b0d9eSJessica Clarke * notice, this list of conditions and the following disclaimer. 119e5b0d9eSJessica Clarke * 2. Redistributions in binary form must reproduce the above copyright 129e5b0d9eSJessica Clarke * notice, this list of conditions and the following disclaimer in the 139e5b0d9eSJessica Clarke * documentation and/or other materials provided with the distribution. 149e5b0d9eSJessica Clarke * 159e5b0d9eSJessica Clarke * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 169e5b0d9eSJessica Clarke * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 179e5b0d9eSJessica Clarke * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 189e5b0d9eSJessica Clarke * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 199e5b0d9eSJessica Clarke * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 209e5b0d9eSJessica Clarke * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 219e5b0d9eSJessica Clarke * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 229e5b0d9eSJessica Clarke * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 239e5b0d9eSJessica Clarke * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 249e5b0d9eSJessica Clarke * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 259e5b0d9eSJessica Clarke * SUCH DAMAGE. 269e5b0d9eSJessica Clarke */ 279e5b0d9eSJessica Clarke 289e5b0d9eSJessica Clarke #pragma once 299e5b0d9eSJessica Clarke 30*aee99ab4SJessica Clarke /* 31*aee99ab4SJessica Clarke * glibc's sys/wait.h and stdlib.h both define various wait-related constants, 32*aee99ab4SJessica Clarke * depending on __USE_XOPEN(2K8) and if the other header has been included. 33*aee99ab4SJessica Clarke * Since they each probe the other's include guard to determine that, there is 34*aee99ab4SJessica Clarke * a window between a header defining its include guard and checking for the 35*aee99ab4SJessica Clarke * other's within which, if the other is included for the first time, they both 36*aee99ab4SJessica Clarke * believe the other has already defined the relevant macros etc, and so 37*aee99ab4SJessica Clarke * neither ends up doing so. This was not previously hit, and is still not hit 38*aee99ab4SJessica Clarke * when using glibc normally (though seems extremely fragile). However, as of 39*aee99ab4SJessica Clarke * glibc 2.34, signal.h, included by sys/wait, includes a new bits/sigstksz, 40*aee99ab4SJessica Clarke * which in turn includes unistd.h (when _SC_SIGSTKSZ_SOURCE is defined, which 41*aee99ab4SJessica Clarke * is implied by _GNU_SOURCE), which we wrap and include stdlib.h from, 42*aee99ab4SJessica Clarke * creating the exact aforementioned situation that breaks. Thus, forcefully 43*aee99ab4SJessica Clarke * include stdlib.h first whenever sys/wait.h is as a workaround, since that 44*aee99ab4SJessica Clarke * way round still works. 45*aee99ab4SJessica Clarke */ 469e5b0d9eSJessica Clarke #include <stdlib.h> 479e5b0d9eSJessica Clarke #include_next <sys/wait.h> 48