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Correct handing of "struct in_pktinfo"

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hpa 2002-01-05 22:49:46 +00:00
parent 303adc9620
commit 60707444d7
1 changed files with 32 additions and 7 deletions
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35
aclocal.m4 vendored
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@ -1,3 +1,16 @@
dnl $Id$
dnl -----------------------------------------------------------------------
dnl
dnl Copyright 1999-2002 H. Peter Anvin - All Rights Reserved
dnl
dnl This program is free software; you can redistribute it and/or modify
dnl it under the terms of the GNU General Public License as published by
dnl the Free Software Foundation, Inc., 53 Temple Place Ste 330,
dnl Bostom MA 02111-1307, USA; either version 2 of the License, or
dnl (at your option) any later version; incorporated herein by reference.
dnl
dnl -----------------------------------------------------------------------
dnl --------------------------------------------------------------------------
dnl PA_ADD_CFLAGS()
dnl
@ -58,14 +71,16 @@ dnl Look for definition of struct in_pktinfo, which at least has an
dnl ipi_addr member. Some versions of glibc lack struct in_pktinfo;
dnl if so we need to include the definition ourselves -- but we only
dnl want to do that if absolutely necessary!
dnl
dnl We don't use AC_CHECK_MEMBER() here, since at least in autoconf 2.52
dnl this is broken for a member of structure type.
dnl ------------------------------------------------------------------------
AH_TEMPLATE([HAVE_STRUCT_IN_PKTINFO],
[Define if struct in_pktinfo is defined.])
AC_DEFUN(PA_STRUCT_IN_PKTINFO,
[AC_CHECK_MEMBER(struct in_pktinfo.ipi_addr,
[AC_DEFINE(HAVE_STRUCT_IN_PKTINFO)],
[],
[AC_MSG_CHECKING([for definition of struct in_pktinfo])
AC_TRY_COMPILE(
[
#include <sys/types.h>
#include <sys/socket.h>
@ -73,6 +88,18 @@ AC_DEFUN(PA_STRUCT_IN_PKTINFO,
#include <arpa/inet.h>
#include <stdlib.h>
#include <sys/uio.h>
],
[
struct in_pktinfo pktinfo;
int foo = sizeof(struct in_pktinfo);
void *quux = (void *)(&pktinfo.ipi_addr);
],
[
AC_DEFINE(HAVE_STRUCT_IN_PKTINFO)
AC_MSG_RESULT(yes)
],
[
AC_MSG_RESULT(no)
])])
dnl --------------------------------------------------------------------------
@ -177,5 +204,3 @@ int main()
[
AC_MSG_RESULT(no)
])])
dnl --------------------------------------------------------------------------