Merge trift2.:/MySQL/M40/clone-4.0

into  trift2.:/MySQL/M40/mysql-4.0

include/config-win.h

@@ -167,7 +167,7 @@ typedef uint rf_SetTimer;
 
 /* Convert some simple functions to Posix */
 
-#define sigset(A,B) signal((A),(B))
+#define my_sigset(A,B) signal((A),(B))
 #define finite(A) _finite(A)
 #define sleep(A)  Sleep((A)*1000)
 

mysys/my_thr_init.c

@@ -60,11 +60,14 @@ static uint get_thread_lib(void);
 
 my_bool my_thread_global_init(void)
 {
+#if defined(SIGALRM) || defined(SIGUSR1)
+  /* On Windows, these signals are not defined, but this whole part is not needed. */
   thd_lib_detected= get_thread_lib();
   if (thd_lib_detected == THD_LIB_LT)
     thr_client_alarm= SIGALRM;
   else
     thr_client_alarm= SIGUSR1;
+#endif
 
   if (pthread_key_create(&THR_KEY_mysys,0))
   {

mysys/thr_alarm.c

@@ -37,7 +37,6 @@
 #define ETIME ETIMEDOUT
 #endif
 
-uint thr_client_alarm;
 static int alarm_aborted=1;			/* No alarm thread */
 my_bool thr_alarm_inited= 0;
 volatile my_bool alarm_thread_running= 0;