config.gcc (s390x-*-linux*): Add t-linux64 makefile fragment.

	* config.gcc (s390x-*-linux*): Add t-linux64 makefile fragment.
	* config/s390/t-linux64: New file.
	* config/s390/libgcc-glibc.ver: New file.

From-SVN: r49553

gcc/ChangeLog

 2002-02-06  Ulrich Weigand  <uweigand@de.ibm.com>
 
+	* config.gcc (s390x-*-linux*): Add t-linux64 makefile fragment.
+	* config/s390/t-linux64: New file.
+	* config/s390/libgcc-glibc.ver: New file.
+
+2002-02-06  Ulrich Weigand  <uweigand@de.ibm.com>
+
 	* config/s390/linux64.h: Delete file.
 	* config/s390/s390x.h: New file.
 	* config.gcc (s390x-*-linux*): Use s390x.h instead of linux64.h

gcc/config.gcc

@@ -2874,7 +2874,7 @@ s390x-*-linux*)
 	tm_p_file=s390/s390-protos.h
 	md_file=s390/s390.md
 	out_file=s390/s390.c
-	tmake_file="t-slibgcc-elf-ver t-linux s390/t-linux"
+	tmake_file="t-slibgcc-elf-ver t-linux s390/t-linux s390/t-linux64"
 	extra_parts="crtbegin.o crtend.o crtbeginS.o crtendS.o crtbeginT.o"
 	if test x$enable_threads = xyes; then
 		thread_file='posix'

gcc/config/s390/libgcc-glibc.ver

+# In order to work around the very problems that force us to now generally
+# create a libgcc.so, glibc reexported a number of routines from libgcc.a.
+# By now choosing the same version tags for these specific routines, we
+# maintain enough binary compatibility to allow future versions of glibc
+# to defer implementation of these routines to libgcc.so via DT_AUXILIARY.
+
+# Note that we cannot use the default libgcc-glibc.ver file on s390x,
+# because GLIBC_2.0 does not exist on this architecture, as the first 
+# ever glibc release on the platform was GLIBC_2.2.
+
+%inherit GCC_3.0 GLIBC_2.2
+GLIBC_2.2 {
+  __register_frame
+  __register_frame_table
+  __deregister_frame
+  __register_frame_info
+  __deregister_frame_info
+  __frame_state_for
+  __register_frame_info_table
+}
+

gcc/config/s390/t-linux64

+# Override t-slibgcc-elf-ver to export some libgcc symbols with
+# the symbol versions that glibc used.
+SHLIB_MAPFILES = $(srcdir)/libgcc-std.ver $(srcdir)/config/s390/libgcc-glibc.ver