update from main archive 970209 cvs/libc-970210

1997-02-09 02:59  Ulrich Drepper  <drepper@cygnus.com>

	* version.h (VERSION): Bump to 2.0.2.

	* posix/Makefile (routines): Add getopt_init.
	* posix/getopt.c: Don't get environment variable with nonoption
	flags here.  Depend on __getopt_nonoption_flags variable filled
	somewhere else.  This is necessary since the variable must be
	removed even when getopt isn't used in case exec(2) gets called.
	* posix/getopt_init.c: New file.  Initialize __getopt_nonoption_flags
	and remove environment variable.
	* sysdeps/i386/init-first.c: Call __getopt_clean_environment.
	* sysdeps/mach/hurd/i386/init-first.c: Likewise.
	* sysdeps/stub/init-first.c: Likewise.
	* sysdeps/unix/sysv/linux/init-first.c: Likewise.

	* sysdeps/generic/dl-sysdep.c (_dl_sysdep_start): Recognize
	AT_PAGESZ entry in auxiliary vector and store value in _dl_pagesize.

	* sysdeps/generic/crypt-entry.h: Return EOPNOTSUPP when DES
	encryption is wanted.

	* libio/vsnprintf.c: If MAXLEN is 0 return 0.
	* stdio/vsnprintf.c: Likewise.
	Reported by Philip Blundell <pjb27@cam.ac.uk>.

1997-02-07 17:43  Ulrich Drepper  <drepper@cygnus.com>

	* sysdeps/generic/sysd-stdio.c: Include <errno.h>.
	Change PTR to void *.
	* sysdeps/posix/vdprintf.c: Change PTR to void *.
	Reported by Brian Oxley <boxley%dev.cm.ssb.com@clipper.ssb.com>.

1997-02-07 17:41  Philip Blundell <pjb27@cam.ac.uk>

	* sysdeps/unix/sysv/linux/socketbits.h: Fix typo.

1997-02-06 13:49  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* rellns-sh: No need to check for existance of first parameter.

1997-02-06 14:50  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* sysdeps/posix/getcwd.c (__getcwd): Fix resource leaks.  Reported
	by David Holland <dholland@eecs.harvard.edu>.

1997-02-06 14:38  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* sunrpc/clnt_tcp.c (readtcp): Pass copy of timeout value to
	select, in case it is modified by the latter.
	* sunrpc/clnt_udp.c (clntudp_call): Likewise.
	* sunrpc/pmap_rmt.c (clnt_broadcast): Likewise.
	* sunrpc/svc_tcp.c (readtcp): Likewise.

	* sunrpc/svc_authux.c (_svcauth_unix): Fix type of area_gids
	array.

	* sunrpc/authuxprot.c (xdr_authunix_parms): Check size of uid_t
	and gid_t.

	* sunrpc/auth_unix.c (authunix_validate): Fix type of second
	argument.

1997-02-06 14:29  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* elf/Makefile (extra-objs): Don't zap previous value.
	* Makefile (before-compile): Likewise.  Don't add gnu/lib-names.h
	twice.

1997-02-06 14:19  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* sysdeps/unix/sysv/linux/m68k/brk.c: Add workaround for
	braindamage (sigh!).

1997-02-06 17:10  Jim Meyering  <meyering@asic.sc.ti.com>

	* manual/memory.texi: Correct `copystring' example for obstacks.

1997-02-06 14:10  Ulrich Drepper  <drepper@cygnus.com>

	* Makeconfig: Don't use [:lower:] and [:upper:] in tr since old
	GNU tr don't grok it.

1997-02-03 21:13  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* sysdeps/unix/sysv/linux/socketbits.h [__GNUC__<2] (struct cmsghdr):
	Don't use GNU C extensions.
	(CMSG_DATA): Use portable definition.

1997-02-05 05:58  Ulrich Drepper  <drepper@cygnus.com>

	* elf/ldd.bash.in: Add test for read permission and print appropriate
	message.  Change warning and error messages to print "ldd: " at start.
	* elf/ldd.sh.in: Likewise.

	* stdlib/Makefile (routines): Add atoll.
	* stdlib/atoll.c: New file.
	* stdlib/stdlib.h: Add prototype and optimization for atoll.

	* stdlib/a64l.c: Update copyright.
	* stdlib/abs.c: Likewise.
	* stdlib/atof.c: Likewise.
	* stdlib/atoi.c: Likewise.
	* stdlib/atol.c: Likewise.
	* stdlib/bsearch.c: Likewise.
	* stdlib/exit.c: Likewise.
	* stdlib/fpioconst.c: Likewise.
	* stdlib/fpioconst.h: Likewise.
	* stdlib/jrand48.c: Likewise.
	* stdlib/jrand48_r.c: Likewise.
	* stdlib/labs.c: Likewise.
	* stdlib/lcong48.c: Likewise.
	* stdlib/lcong48_r.c: Likewise.
	* stdlib/llabs.c: Likewise.
	* stdlib/lrand48.c: Likewise.
	* stdlib/lrand48_r.c: Likewise.
	* stdlib/mblen.c: Likewise.
	* stdlib/mbstowcs.c: Likewise.
	* stdlib/mbtowc.c: Likewise.
	* stdlib/mp_clz_tab.c: Likewise.
	* stdlib/mrand48.c: Likewise.
	* stdlib/mrand48_r.c: Likewise.
	* stdlib/msort.c: Likewise.
	* stdlib/nrand48.c: Likewise.
	* stdlib/nrand48_r.c: Likewise.
	* stdlib/qsort.c: Likewise.
	* stdlib/rpmatch.c: Likewise.
	* stdlib/seed48.c: Likewise.
	* stdlib/seed48_r.c: Likewise.
	* stdlib/srand48.c: Likewise.
	* stdlib/srand48_r.c: Likewise.
	* stdlib/strtod.c: Likewise.
	* stdlib/wcstombs.c: Likewise.
	* stdlib/wctomb.c: Likewise.

1997-02-05 05:08  Ulrich Drepper  <drepper@cygnus.com>

	* stdlib/mp_clz_tab.c (__clz_tab): Follow change in GMP and define
	as const.

1997-02-04 23:57  Fila Kolodny  <fila@ibi.com>

	* sysdeps/unix/sysv/linux/socketbits.h: Define __need_NULL before
	including <stddef.h>.

1997-02-03 20:01  H.J. Lu  <hjl@gnu.ai.mit.edu>

	* time/Makefile (tzbases, tzlinks): New.
	(tzfiles): Changed to $(tzbases) $(tzlinks).
	($(tzfiles:%=$(objpfx)z.%): Make $(tzlinks) depend on $(tzbases).

1997-02-02 12:13  H.J. Lu  <hjl@gnu.ai.mit.edu>

	* Makefile (install): Ignore error from ldconfig.

	* time/zic.c (mkdirs): Double check the error return of mkdir ().

1997-02-04 22:01  Ulrich Drepper  <drepper@cygnus.com>

	* stdio-common/vfprintf.c: Prepare to use __va_copy for architectures
	like PPC where va_list is no integral type.

1997-02-04 15:27  Roma Ekzhanov  <ekzhanov@paragraph.com>

	* posix/getopt.c (exchange): Don't allocate nonoption_flags array
	if nonoption_flags_len == -1.

11 files changed, 111 insertions, 69 deletions

diff --git a/sysdeps/generic/crypt-entry.c b/sysdeps/generic/crypt-entry.c
index 4a11b25752..ba23d1f3d4 100644
--- a/sysdeps/generic/crypt-entry.c
+++ b/sysdeps/generic/crypt-entry.c
@@ -1,5 +1,5 @@
 /* Wrapper around MD5 sum replacement for crypt function.
-   Copyright (C) 1996 Free Software Foundation, Inc.
+   Copyright (C) 1996, 1997 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
 
@@ -48,7 +48,7 @@ crypt_r (key, salt, data)
     return md5_crypt_r (key, salt, (char *) data, sizeof (struct crypt_data));
 
   /* We don't have DES encryption.  */
-  __set_errno (ENOSYS);
+  __set_errno (EOPNOTSUPP);
   return NULL;
 }
 
@@ -63,6 +63,6 @@ crypt (key, salt)
     return md5_crypt (key, salt);
 
   /* We don't have DES encryption.  */
-  __set_errno (ENOSYS);
+  __set_errno (EOPNOTSUPP);
   return NULL;
 }
diff --git a/sysdeps/generic/dl-sysdep.c b/sysdeps/generic/dl-sysdep.c
index 32697e782a..9408e61dbf 100644
--- a/sysdeps/generic/dl-sysdep.c
+++ b/sysdeps/generic/dl-sysdep.c
@@ -31,6 +31,7 @@
 extern int _dl_argc;
 extern char **_dl_argv;
 extern char **_environ;
+extern size_t _dl_pagesize;
 extern void _end;
 extern void _start (void);
 
@@ -75,6 +76,9 @@ _dl_sysdep_start (void **start_argptr,
       case AT_PHNUM:
 	phnum = av->a_un.a_val;
 	break;
+      case AT_PAGESZ:
+	_dl_pagesize = av->a_un.a_val;
+	break;
       case AT_ENTRY:
 	user_entry = av->a_un.a_val;
 	break;
diff --git a/sysdeps/generic/sysd-stdio.c b/sysdeps/generic/sysd-stdio.c
index 363a763449..f5147bb3aa 100644
--- a/sysdeps/generic/sysd-stdio.c
+++ b/sysdeps/generic/sysd-stdio.c
@@ -16,6 +16,7 @@
    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
    Boston, MA 02111-1307, USA.  */
 
+#include <errno.h>
 #include <stddef.h>
 #include <stdio.h>
 #include <stdlib.h>
@@ -155,7 +156,7 @@ __stdio_open (filename, m, cookieptr)
   if (fd < 0)
     return -1;
 
-  *cookieptr = (PTR) fd;
+  *cookieptr = (void *) fd;
   return 0;
 }
 
diff --git a/sysdeps/i386/init-first.c b/sysdeps/i386/init-first.c
index 0fa08e9d17..4b83e19285 100644
--- a/sysdeps/i386/init-first.c
+++ b/sysdeps/i386/init-first.c
@@ -20,6 +20,7 @@
 #include <unistd.h>
 
 extern void __libc_init (int, char **, char **);
+extern void __getopt_clean_environment (void);
 extern void __libc_global_ctors (void);
 
 int __libc_multiple_libcs = 1;
@@ -33,6 +34,9 @@ init (int *data)
 
   __environ = envp;
   __libc_init (argc, argv, envp);
+
+  /* This is a hack to make the special getopt in GNU libc working.  */
+  __getopt_clean_environment ();
 }
 
 #ifdef PIC
diff --git a/sysdeps/mach/hurd/i386/init-first.c b/sysdeps/mach/hurd/i386/init-first.c
index f898e9a669..c9249bba4e 100644
--- a/sysdeps/mach/hurd/i386/init-first.c
+++ b/sysdeps/mach/hurd/i386/init-first.c
@@ -1,21 +1,21 @@
 /* Initialization code run first thing by the ELF startup code.  For i386/Hurd.
-Copyright (C) 1995, 1996 Free Software Foundation, Inc.
-This file is part of the GNU C Library.
+   Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
 
-The GNU C Library is free software; you can redistribute it and/or
-modify it under the terms of the GNU Library General Public License as
-published by the Free Software Foundation; either version 2 of the
-License, or (at your option) any later version.
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
 
-The GNU C Library is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-Library General Public License for more details.
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
 
-You should have received a copy of the GNU Library General Public
-License along with the GNU C Library; see the file COPYING.LIB.  If
-not, write to the Free Software Foundation, Inc., 675 Mass Ave,
-Cambridge, MA 02139, USA.  */
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
 
 #include <hurd.h>
 #include <stdio.h>
@@ -27,6 +27,7 @@ Cambridge, MA 02139, USA.  */
 
 extern void __mach_init (void);
 extern void __libc_init (int, char **, char **);
+extern void __getopt_clean_environment (void);
 extern void __libc_global_ctors (void);
 
 int __libc_multiple_libcs = 1;
@@ -34,6 +35,9 @@ int __libc_multiple_libcs = 1;
 int __libc_argc;
 char **__libc_argv;
 
+/* We often need the PID.  Cache this value.  */
+pid_t __libc_pid;
+
 void *(*_cthread_init_routine) (void); /* Returns new SP to use.  */
 void (*_cthread_exit_routine) (int status) __attribute__ ((__noreturn__));
 
@@ -99,6 +103,10 @@ init1 (int argc, char *arg0, ...)
 		d->intarray, d->intarraysize);
 
   __libc_init (argc, argv, __environ);
+
+  /* This is a hack to make the special getopt in GNU libc working.  */
+  __getopt_clean_environment ();
+
 #ifdef PIC
   __libc_global_ctors ();
 #endif
diff --git a/sysdeps/posix/getcwd.c b/sysdeps/posix/getcwd.c
index a83b286380..fa3cf98c74 100644
--- a/sysdeps/posix/getcwd.c
+++ b/sysdeps/posix/getcwd.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1991, 92, 93, 94, 95, 96 Free Software Foundation, Inc.
+/* Copyright (C) 1991, 92, 93, 94, 95, 96, 97 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -330,8 +330,9 @@ __getcwd (buf, size)
 	    {
 	      if (buf != NULL)
 		{
+		  (void) __closedir (dirstream);
 		  __set_errno (ERANGE);
-		  return NULL;
+		  goto lose;
 		}
 	      else
 		{
@@ -342,7 +343,7 @@ __getcwd (buf, size)
 		      (void) __closedir (dirstream);
 		      free (path);
 		      __set_errno (ENOMEM);/* closedir might have changed it.*/
-		      return NULL;
+		      goto lose;
 		    }
 		  pathp = &buf[pathp - path + size / 2];
 		  path = buf;
diff --git a/sysdeps/posix/vdprintf.c b/sysdeps/posix/vdprintf.c
index 2f9441df14..85ad530060 100644
--- a/sysdeps/posix/vdprintf.c
+++ b/sysdeps/posix/vdprintf.c
@@ -1,20 +1,20 @@
 /* Copyright (C) 1991, 1992, 1993, 1997 Free Software Foundation, Inc.
-This file is part of the GNU C Library.
-
-The GNU C Library is free software; you can redistribute it and/or
-modify it under the terms of the GNU Library General Public License as
-published by the Free Software Foundation; either version 2 of the
-License, or (at your option) any later version.
-
-The GNU C Library is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-Library General Public License for more details.
-
-You should have received a copy of the GNU Library General Public
-License along with the GNU C Library; see the file COPYING.LIB.  If
-not, write to the Free Software Foundation, Inc., 675 Mass Ave,
-Cambridge, MA 02139, USA.  */
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
 
 #include <errno.h>
 #include <limits.h>
diff --git a/sysdeps/stub/init-first.c b/sysdeps/stub/init-first.c
index 32ffa82c8a..5e2cd121f1 100644
--- a/sysdeps/stub/init-first.c
+++ b/sysdeps/stub/init-first.c
@@ -1,27 +1,28 @@
 /* Initialization code run first thing by the ELF startup code.  Stub version.
-Copyright (C) 1995 Free Software Foundation, Inc.
-This file is part of the GNU C Library.
+   Copyright (C) 1995 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
 
-The GNU C Library is free software; you can redistribute it and/or
-modify it under the terms of the GNU Library General Public License as
-published by the Free Software Foundation; either version 2 of the
-License, or (at your option) any later version.
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
 
-The GNU C Library is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-Library General Public License for more details.
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
 
-You should have received a copy of the GNU Library General Public
-License along with the GNU C Library; see the file COPYING.LIB.  If
-not, write to the Free Software Foundation, Inc., 675 Mass Ave,
-Cambridge, MA 02139, USA.  */
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
 
 #include <unistd.h>
 
 int __libc_multiple_libcs = 1;
 
 extern void __libc_init (int, char **, char **);
+extern void __getopt_clean_environment (void);
 
 #ifdef PIC
 void
@@ -45,4 +46,7 @@ void __libc_init_first
 
   __environ = envp;
   __libc_init (argc, argv, envp);
+
+  /* This is a hack to make the special getopt in GNU libc working.  */
+  __getopt_clean_environment ();
 }
diff --git a/sysdeps/unix/sysv/linux/init-first.c b/sysdeps/unix/sysv/linux/init-first.c
index 7c5b510956..cbb5fa8a23 100644
--- a/sysdeps/unix/sysv/linux/init-first.c
+++ b/sysdeps/unix/sysv/linux/init-first.c
@@ -1,5 +1,5 @@
 /* Initialization code run first thing by the ELF startup code.  Linux version.
-   Copyright (C) 1995, 1996 Free Software Foundation, Inc.
+   Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -22,6 +22,7 @@
 #include <fpu_control.h>
 #include <linux/personality.h>
 #include <init-first.h>
+#include <sys/types.h>
 
 extern void __libc_init (int, char **, char **);
 extern void __libc_global_ctors (void);
@@ -41,11 +42,15 @@ int __libc_multiple_libcs = 1;
 int __libc_argc;
 char **__libc_argv;
 
+/* We often need the PID.  Cache this value.  */
+pid_t __libc_pid;
+
 
 static void
 init (int argc, char **argv, char **envp)
 {
   extern int __personality (int);
+  extern void __getopt_clean_environment (void);
 
   /* We must not call `personality' twice.  */
   if (!__libc_multiple_libcs)
@@ -68,6 +73,9 @@ init (int argc, char **argv, char **envp)
 
   __libc_init (argc, argv, envp);
 
+  /* This is a hack to make the special getopt in GNU libc working.  */
+  __getopt_clean_environment ();
+
 #ifdef PIC
   __libc_global_ctors ();
 #endif
diff --git a/sysdeps/unix/sysv/linux/m68k/brk.c b/sysdeps/unix/sysv/linux/m68k/brk.c
index 402dfc56f7..bbbcf84188 100644
--- a/sysdeps/unix/sysv/linux/m68k/brk.c
+++ b/sysdeps/unix/sysv/linux/m68k/brk.c
@@ -1,27 +1,32 @@
 /* brk system call for Linux/m68k.
-Copyright (C) 1996 Free Software Foundation, Inc.
-This file is part of the GNU C Library.
+   Copyright (C) 1996, 1997 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
 
-The GNU C Library is free software; you can redistribute it and/or
-modify it under the terms of the GNU Library General Public License as
-published by the Free Software Foundation; either version 2 of the
-License, or (at your option) any later version.
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
 
-The GNU C Library is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-Library General Public License for more details.
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
 
-You should have received a copy of the GNU Library General Public
-License along with the GNU C Library; see the file COPYING.LIB.  If
-not, write to the Free Software Foundation, Inc., 675 Mass Ave,
-Cambridge, MA 02139, USA.  */
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
 
 #include <errno.h>
 #include <unistd.h>
 #include <sysdep.h>
 
-void *__curbrk;
+void *__curbrk = 0;
+
+/* Old braindamage in GCC's crtstuff.c requires this symbol in an attempt
+   to work around different old braindamage in the old Linux/x86 ELF
+   dynamic linker.  Sigh.  */
+weak_alias (__curbrk, ___brk_addr)
 
 int
 __brk (void *addr)
diff --git a/sysdeps/unix/sysv/linux/socketbits.h b/sysdeps/unix/sysv/linux/socketbits.h
index 91deb6c815..915e0f001e 100644
--- a/sysdeps/unix/sysv/linux/socketbits.h
+++ b/sysdeps/unix/sysv/linux/socketbits.h
@@ -23,6 +23,7 @@
 #include <features.h>
 
 #define	__need_size_t
+#define __need_NULL
 #include <stddef.h>
 
 
@@ -134,13 +135,19 @@ struct cmsghdr
     /* XXX Should be type `size_t' according to POSIX.1g.  */
     int cmsg_level;		/* Originating protocol.  */
     int cmsg_type;		/* Protocol specific type.  */
+#if !defined __STRICT_ANSI__ && defined __GNUC__ && __GNUC__ >= 2
     unsigned char __cmsg_data[0]; /* Ancillary data.  */
+#endif
   };
 
 /* Ancillary data object manipulation macros.  */
-#define CMSG_DATA(cmsg) ((cmsg)->__cmsg_data)
+#if !defined __STRICT_ANSI__ && defined __GNUC__ && __GNUC__ >= 2
+# define CMSG_DATA(cmsg) ((cmsg)->__cmsg_data)
+#else
+# define CMSG_DATA(cmsg) ((unsigned char *) ((struct cmsghdr *) (cmsg) + 1))
+#endif
 #define CMSG_NXTHDR(mhdr, cmsg) __cmsg_nxthdr (mhdr, cmsg)
-#define CMSG_FIRSTHDR(mhdr) (mhdr) \
+#define CMSG_FIRSTHDR(mhdr) \
   ((size_t) (mhdr)->msg_controllen >= sizeof (struct cmsghdr)			      \
    ? (struct cmsghdr *) (mhdr)->msg_control : (struct cmsghdr *) NULL)