Initial ARC support.

gas/config/.Sanitize

@@ -23,6 +23,14 @@ else
 	lose_these_too="${rce_files} ${lose_these_too}"
 fi
 
+arc_files="tc-arc.c tc-arc.h arc.mt"
+
+if ( echo $* | grep keep\-arc > /dev/null ) ; then
+	keep_these_too="${arc_files} ${keep_these_too}"
+else
+	lose_these_too="${arc_files} ${lose_these_too}"
+fi
+
 # All files listed between the "Things-to-keep:" line and the
 # "Files-to-sed:" line will be kept.  All other files will be removed.
 # Directories listed in this section will have their own Sanitize

gas/config/arc.mt

@@ -0,0 +1 @@
+TARG_CPU_DEPENDENTS=$(srcdir)/../include/opcode/arc.h