patch/proposal: obsolete configurations in 3.1

[Zack Weinberg <zack at codesourcery dot com>]

There has been some discussion of obsoleting very old configurations.
It seemed to me that there was agreement that that was a good idea in
principle, but no one had time to research an appropriate list.
However, GDB has done some of the work for us -- they have been
removing obsolete configurations since 4.18.

For GCC 3.1 I propose to mark the following configuration triples
obsolete:

	a29k-*-*
	arm-*-riscix*
	c*-convex-*
	i[3456]86*-*-sunos*
	i[3456]86*-freebsd1.*
	i[3456]86*-freebsd2.[01]*
	m68[k0]*-altos-*
	m68[k0]*-isi-*
	m68[k0]*-sony-*
	ns32k-encore-bsd*
	ns32k-sequent-bsd*
	ns32k-tek6[12]00-bsd*
	ns32k-merlin-*
	ns32k-pc532-*

These are the triples which GDB 5.2 will have obsoleted or removed,
and which have support in GCC.  (All but a29k-*-* are already gone
from GDB.)

I further propose to delete all support for these configurations from
mainline immediately.  If people turn up expressing interest in them,
we can pull them back out of CVS; I consider it extremely unlikely
that this will happen.

Enclosed are the patch for config.gcc in 3.1 and for changes.html.

Final note: the only remaining ns32k configurations are netbsd and
openbsd.  Are these live ports of those operating systems?

zw

	* config.gcc: Import list of obsolete targets from GDB.

===================================================================
Index: config.gcc
--- config.gcc	12 Apr 2002 00:56:52 -0000	1.167.2.11
+++ config.gcc	12 Apr 2002 19:43:22 -0000
@@ -207,6 +207,32 @@ gas="$gas_flag"
 gnu_ld="$gnu_ld_flag"
 enable_threads=$enable_threads_flag
 
+# Obsolete configurations.
+case $machine in
+	  a29k-*-* \
+	| arm-*-riscix* \
+	| c*-convex-* \
+	| i[3456]86*-*-sunos* \
+	| i[3456]86*-freebsd1.* \
+	| i[3456]86*-freebsd2.[01]* \
+	| m68[k0]*-altos-* \
+	| m68[k0]*-isi-* \
+	| m68[k0]*-sony-* \
+	| ns32k-encore-bsd* \
+	| ns32k-sequent-bsd* \
+	| ns32k-tek6[12]00-bsd* \
+	| ns32k-merlin-* \
+	| ns32k-pc532-* \
+	)
+  if test "x$enable_obsolete" = x; then
+    echo "*** Configuration $machine is obsolete." >&2
+    echo "*** Specify --enable-obsolete to build it anyway." >&2
+    echo "*** Support will be REMOVED in the next major release of GCC," >&2
+    echo "*** unless a maintainer comes forward." >&2
+    exit 1
+  fi;;
+esac
+
 # Set default cpu_type, tm_file, tm_p_file and xm_file so it can be
 # updated in each machine entry.  Also set default extra_headers for some
 # machines.
===================================================================
Index: gcc-3.1/changes.html
--- gcc-3.1/changes.html	9 Apr 2002 00:43:50 -0000	1.9
+++ gcc-3.1/changes.html	12 Apr 2002 19:43:59 -0000
@@ -69,6 +69,33 @@
     information.</li>
   </ul>
   </li>
+
+  <li>Obsolete Targets
+  <ul>
+     <li>AMD 29k family: <code>a29k-*-*</code></li>
+     <li>ARM RISCix: <code>arm-*-riscix*</code></li>
+     <li>Convex family: <code>c*-convex-*</code></li>
+     <li>SunOS 4 on i386: <code>i[3456]86*-*-sunos*</code></li>
+     <li>i386 FreeBSD before 2.2:
+            <code>i[3456]86*-freebsd1.*</code> and 
+            <code>i[3456]86*-freebsd2.[01]*</code></li>
+     <li>Altos 3068: <code>m68[k0]*-altos-*</code></li>
+     <li>ISI Optimum V: <code>m68[k0]*-isi-*</code></li>
+     <li>Sony NEWS (m68k): <code>m68[k0]*-sony-*</code></li>
+     <li>Most NS32k family:
+        <ul>
+          <li><code>ns32k-encore-bsd*</code></li>
+          <li><code>ns32k-sequent-bsd*</code></li>
+          <li><code>ns32k-tek6[12]00-bsd*</code></li>
+          <li><code>ns32k-merlin-*</code></li>
+          <li><code>ns32k-pc532-*</code></li>
+        </ul>
+     </li>
+  </ul>
+  <p>Support for these systems has been declared obsolete in GCC 3.1.
+     Unless there is activity to revive them, the next release of GCC
+     will have their sources permanently REMOVED.</p>
+  </li>
     
   <li>Documentation improvements</li>