1998-12-04 Mark Kettenis <kettenis@phys.uva.nl>

	Provide backwards binary compatibility for the Hurd.
	* hurd/geteuids.c [PIC && DO_VERSIONING]: Make __getuids a weak
	alias for geteuids.
	* hurd/Versions [GLIBC_2.0]: Add __getuids,
	__hurd_file_name_lookup and _hurd_umask.
	[GLIBC_2.1]: Add _hurd_proc_init.
	* hurd/Makefile [versioning] (routines): Add compat-20.
	(shared-only-routines): Likewise.
	* hurd/hurdinit.c (_hurd_new_proc_init): Renamed from
	_hurd_proc_init.  Use it as the default _hurd_proc_init version
	for GLIBC_2.1.
	* hurd/compat-20.c: New file.
	* mach/Versions [GLIBC_2.0]: Add __vm_allocate.

5 files changed, 69 insertions, 3 deletions

diff --git a/hurd/Makefile b/hurd/Makefile
index 3eeb445..250e441 100644
--- a/hurd/Makefile
+++ b/hurd/Makefile
@@ -66,6 +66,13 @@ distribute = hurdstartup.h hurdfault.h hurdhost.h \
 # XXX this is a temporary hack; see hurdmalloc.h
 routines += hurdmalloc
 distribute += hurdmalloc.h
+
+# Binary compatibility for libc.so.0.2[GLIBC_2.0].
+ifeq ($(versioning),yes)
+routines += compat-20
+endif
+
+shared-only-routines = compat-20
 
 include ../mach/Machrules
 include ../Rules
diff --git a/hurd/Versions b/hurd/Versions
index 83974ca..f3e311b 100644
--- a/hurd/Versions
+++ b/hurd/Versions
@@ -1,5 +1,13 @@
 libc {
   GLIBC_2.0 {
+    # These few symbols are here only for binary compatibility
+    # with the pre-versioning libc.so.0.2 ABI.  Their replacements
+    # are in the GLIBC_2.1 version set.  When the soname changes,
+    # these can be removed.
+    __getuids;
+    __hurd_file_name_lookup;
+    _hurd_proc_init; _hurd_umask;
+
     # necessary for the Hurd brk implementation
     _end;
 
@@ -49,7 +57,6 @@ libc {
     _hurd_port_get;
     _hurd_port_locked_get;
     _hurd_ports_use;
-    _hurd_proc_init;
     _hurd_thread_sigstate;
 
     # functions in normal name space
@@ -91,6 +98,9 @@ libc {
     vpprintf;
   }
   GLIBC_2.1 {
+    # "quasi-internal" functions
+    _hurd_proc_init;
+
     # g*
     geteuids;
 
diff --git a/hurd/compat-20.c b/hurd/compat-20.c
new file mode 100644
index 0000000..75d51ce
--- /dev/null
+++ b/hurd/compat-20.c
@@ -0,0 +1,32 @@
+/* Old-versioned functions for binary compatibility with glibc-2.0.
+   Copyright (C) 1998 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., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <hurd.h>
+
+/* This file provides definitions for binary compatibility with
+   the GLIBC_2.0 version set for the libc.so.0.2 soname.
+
+   These definitions can be removed when the soname changes.  */
+
+void
+_hurd_proc_init_compat_20 (char **argv)
+{
+  _hurd_proc_init (argv, NULL, 0);
+}
+symbol_version (_hurd_proc_init_compat_20, _hurd_proc_init, GLIBC_2.0);
diff --git a/hurd/geteuids.c b/hurd/geteuids.c
index ed85dfd..e37f9c2 100644
--- a/hurd/geteuids.c
+++ b/hurd/geteuids.c
@@ -61,3 +61,9 @@ geteuids (int n, uid_t *uidset)
 
   return nuids;
 }
+
+/* XXX Remove this alias when we bump the libc soname.  */
+
+#if defined PIC && DO_VERSIONING
+weak_alias (geteuids, __getuids)
+#endif
diff --git a/hurd/hurdinit.c b/hurd/hurdinit.c
index cd0d6e5..50b6729 100644
--- a/hurd/hurdinit.c
+++ b/hurd/hurdinit.c
@@ -118,8 +118,8 @@ DEFINE_HOOK (_hurd_proc_subinit, (void));
    Call _hurdsig_init to set up signal processing.  */
 
 void
-_hurd_proc_init (char **argv,
-		 const int *intarray, size_t intarraysize)
+_hurd_new_proc_init (char **argv,
+		     const int *intarray, size_t intarraysize)
 {
   mach_port_t oldmsg;
   struct hurd_userlink ulink;
@@ -160,6 +160,17 @@ _hurd_proc_init (char **argv,
        our parent (presumably a debugger) that the exec has completed.  */
     __msg_sig_post (_hurd_msgport, SIGTRAP, 0, __mach_task_self ());
 }
+
+/* XXX Remove this versioning stuff and rename __new_hurd_proc_init
+   above back to _hurd_proc_init when we bump the libc soname.  */
+
+#if defined PIC && DO_VERSIONING
+default_symbol_version (_hurd_new_proc_init, _hurd_proc_init, GLIBC_2.1);
+#else
+# ifdef weak_alias
+weak_alias (_hurd_new_proc_init, _hurd_proc_init)
+# endif
+#endif
 
 /* Called when we get a message telling us to change our proc server port.  */