* dcrt0.cc (dll_crt0_1): Initialize mainthread stuff here before anything needs

it.
* sigproc.cc (sigproc_init): Move mainthread initialization out of here.
* sigproc.h (sigthread): Add init() method.
(sigframe): Don't try to initialize muto.
* sync.cc: Undef WaitForSingleObject to avoid recursion.

winsup/cygwin/sigproc.cc

@@ -100,7 +100,6 @@ Static waitq waitq_main;		// Storage for main thread
 
 muto NO_COPY *sync_proc_subproc = NULL;	// Control access to subproc stuff
 
-sigthread NO_COPY mainthread;		// ID of the main thread
 DWORD NO_COPY sigtid = 0;		// ID of the signal thread
 
 int NO_COPY pending_signals = 0;	// TRUE if signals pending
@@ -604,9 +603,6 @@ sigproc_init ()
      to a signal handler function. */
   signal_arrived = CreateEvent(&sec_none_nih, TRUE, FALSE, NULL);
 
-  mainthread.id = GetCurrentThreadId ();// For use in determining if signals
-				  //  should be blocked.
-
   if (!(hwait_sig = makethread (wait_sig, NULL, 0, "sig")))
     {
       system_printf ("cannot create wait_sig thread, %E");