* xm-i386mach.h: add decl for errno.

gdb/ChangeLog

@@ -1,5 +1,7 @@
 Tue Apr  7 16:34:07 1992  Per Bothner  (bothner@cygnus.com)
 
+	* xm-i386mach.h:  add decl for errno.
+
 	* breakpoint.c (breakpoint_1):  Add (int) casts for enums
 	used in array index context (otherwise, some compilers barf).	
 

gdb/xm-i386mach.h

@@ -42,3 +42,6 @@ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
 #define FETCH_INFERIOR_REGISTERS
 
 #define PREPARE_TO_STORE() read_register_bytes (0, NULL, REGISTER_BYTES)
+
+/* <errno.h> only defines this if __STDC__!!! */
+extern int errno;