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