Missing cfgrtl GGC roots

[David S. Miller]

If anyone is getting mysterious crashes on the mainline, the following
might explain it. :-)

I'm regtesting this on sparc64-linux and will install it onto the
mainline once that passes.

Geoffrey, the documentation about GTY(()) in the GCC internals manual
is a little bit confusing for this case.  When adding new GGC roots,
what exactly is required in Makefile.in?  I believe I got it right
below, but you never know :-)

2002-06-24  David S. Miller  <davem@redhat.com>

	* Makefile.in (GTFILES): Add basic-block.h
	* basic-block.h (label_value_list, tail_recursion_label_list):
	Mark with GTY.

--- Makefile.in.~1~	Thu Jun 20 18:21:37 2002
+++ Makefile.in	Mon Jun 24 09:01:42 2002
@@ -1813,6 +1813,7 @@
   $(srcdir)/tree.h $(srcdir)/libfuncs.h $(srcdir)/hashtable.h $(srcdir)/real.h \
   $(srcdir)/varray.h $(srcdir)/ssa.h $(srcdir)/insn-addr.h $(srcdir)/cselib.h \
   $(srcdir)/c-common.h $(srcdir)/c-tree.h \
+  $(srcdir)/basic-block.h \
   $(srcdir)/alias.c $(srcdir)/bitmap.c $(srcdir)/cselib.c \
   $(srcdir)/dependence.c $(srcdir)/dwarf2out.c $(srcdir)/emit-rtl.c \
   $(srcdir)/except.c $(srcdir)/explow.c $(srcdir)/expr.c \
--- basic-block.h.~1~	Thu Jun 20 18:21:38 2002
+++ basic-block.h	Mon Jun 24 08:58:55 2002
@@ -267,7 +267,8 @@
 
 /* Special labels found during CFG build.  */
 
-extern rtx label_value_list, tail_recursion_label_list;
+extern GTY(()) rtx label_value_list;
+extern GTY(()) rtx tail_recursion_label_list;
 
 extern struct obstack flow_obstack;