- (dtucker) [configure.ac defines.h] Have configure check for offsetof

to prevent redefinition warnings.

ChangeLog

@@ -11,6 +11,8 @@
  - (dtucker) [openbsd-compat/xmmap.c] Include stdlib.h for mkstemp prototype.
  - (dtucker) [configure.ac defines.h] Prevent warnings about __attribute__
    __nonnull__ for versions of GCC that don't support it.
+ - (dtucker) [configure.ac defines.h] Have configure check for offsetof
+   to prevent redefinition warnings.
 
   20070406
    - (dtucker) [INSTALL] Update the systems that have PAM as standard.  Link
@@ -2895,4 +2897,4 @@
    OpenServer 6 and add osr5bigcrypt support so when someone migrates
    passwords between UnixWare and OpenServer they will still work. OK dtucker@
 
-$Id: ChangeLog,v 1.4657 2007/04/29 04:49:21 dtucker Exp $
+$Id: ChangeLog,v 1.4658 2007/04/29 05:06:44 dtucker Exp $

configure.ac

@@ -1,4 +1,4 @@
-# $Id: configure.ac,v 1.378 2007/04/29 04:49:21 dtucker Exp $
+# $Id: configure.ac,v 1.379 2007/04/29 05:06:44 dtucker Exp $
 #
 # Copyright (c) 1999-2004 Damien Miller
 #
@@ -15,7 +15,7 @@
 # OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 
 AC_INIT(OpenSSH, Portable, openssh-unix-dev@mindrot.org)
-AC_REVISION($Revision: 1.378 $)
+AC_REVISION($Revision: 1.379 $)
 AC_CONFIG_SRCDIR([ssh.c])
 
 AC_CONFIG_HEADER(config.h)
@@ -1375,6 +1375,10 @@ AC_CHECK_DECLS(MAXSYMLINKS, , , [
 #include <sys/param.h>
 	])
 
+AC_CHECK_DECLS(offsetof, , , [
+#include <stddef.h>
+	])
+
 AC_CHECK_FUNCS(setresuid, [
 	dnl Some platorms have setresuid that isn't implemented, test for this
 	AC_MSG_CHECKING(if setresuid seems to work)

defines.h

@@ -25,7 +25,7 @@
 #ifndef _DEFINES_H
 #define _DEFINES_H
 
-/* $Id: defines.h,v 1.141 2007/04/29 04:49:21 dtucker Exp $ */
+/* $Id: defines.h,v 1.142 2007/04/29 05:06:45 dtucker Exp $ */
 
 
 /* Constants */
@@ -491,7 +491,7 @@ struct winsize {
 	 (struct cmsghdr *)NULL)
 #endif /* CMSG_FIRSTHDR */
 
-#ifndef offsetof
+#if defined(HAVE_DECL_OFFSETOF) && HAVE_DECL_OFFSETOF == 0
 # define offsetof(type, member) ((size_t) &((type *)0)->member)
 #endif