See gdb ChangeLog entry with header:

Thu Jul 25 19:41:31 1996  Fred Fish  <fnf@cygnus.com>

for a rather huge set of changes.  I was going to put them here, but it
made cvs dump core.  :-(

gdb/i960-tdep.c

@@ -25,6 +25,7 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
 #include "frame.h"
 #include "floatformat.h"
 #include "target.h"
+#include "gdbcore.h"
 
 static CORE_ADDR next_insn PARAMS ((CORE_ADDR memaddr,
 				    unsigned int *pword1,