* configure.in, tm-amix.h, tm-i386v4.h, xm-amix.h, xm-i386v4.h:

Change svr4 references to sysv4.

* source.c:  Move declaration of external function index to
front of file so it is in scope for all references.

* utils.c (error, fatal):  Make definitions consistent with
defs.h declarations (declared as "volatile void").

gdb/tm-i386v4.h

@@ -28,9 +28,14 @@ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
  */
 #define START_INFERIOR_TRAPS_EXPECTED 2
 
-#include "tm-svr4.h"
+/* Pick up most of what we need from the generic i386 target include file. */
+
 #include "tm-i386v.h"
 
+/* Pick up more stuff from the generic SVR4 host include file. */
+
+#include "tm-sysv4.h"
+
 /* We can't tell how many args there are
    now that the C compiler delays popping them.  */