Mercurial > gnulib
view m4/passfd.m4 @ 40212:8da9577294da
unistr/*, uniconv/*: Fix undefined behaviour.
Reported by Jeffrey Walton <noloader@gmail.com>.
* lib/unistr/u-cpy.h (FUNC): Don't invoke memcpy with a zero size.
* lib/unistr/u-cpy-alloc.h (FUNC): Likewise.
* lib/uniconv/u8-conv-from-enc.c (u8_conv_from_encoding): Likewise.
* lib/uniconv/u8-conv-to-enc.c (u8_conv_to_encoding): Likewise.
author | Bruno Haible <bruno@clisp.org> |
---|---|
date | Sat, 09 Mar 2019 00:01:47 +0100 |
parents | b06060465f09 |
children |
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# passfd.m4 serial 8 dnl Copyright (C) 2011-2019 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_PASSFD], [ AC_REQUIRE([gl_HEADER_SYS_SOCKET]) AC_CHECK_FUNCS_ONCE([recvmsg sendmsg]) dnl Persuade AIX 5.2 <sys/socket.h> to declare CMSG_SPACE, CMSG_LEN. dnl CMSG_FIRSTHDR is POSIX 2008, but CMSG_SPACE is only in RFC 3542. AC_DEFINE([_LINUX_SOURCE_COMPAT], [1], [Define in order to get some macros on AIX systems.]) dnl Passfd prefers the POSIX use of msg.msg_control if the CMSG_* macros dnl are present, but can fall back to BSD 4.3 style of msg.msg_accrights. AC_CHECK_MEMBERS([struct msghdr.msg_accrights], [], [], [[ #include <sys/types.h> #include <sys/socket.h> ]]) ])