Merge GDB 7.5.1

gdb/testsuite/gdb.base/interrupt.c

 #include <errno.h>
 #include <stdio.h>
 #include <unistd.h>
 #include <stdlib.h>
 
 #ifdef SIGNALS
 #include <signal.h>
 
 static void
 sigint_handler (int signo)
 {
 }
 #endif
 
 int
 main ()
 {
   char x;
   int nbytes;
-#ifdef usestubs
-  set_debug_traps();
-  breakpoint();
-#endif
 #ifdef SIGNALS
   signal (SIGINT, sigint_handler);
 #endif
   printf ("talk to me baby\n");
   while (1)
     {
       nbytes = read (0, &x, 1);
       if (nbytes < 0)
         {
 #ifdef EINTR
@@ skipping 13 matching lines @@
         write (1, &x, 1);
     }
   return 0;
 }
 
 int
 func1 ()
 {
   return 4;
 }