* dcrt0.cc (dll_crt0_1): Move set_os_type.

(_dll_crt0): To here.
(cygwin_dll_init): And here.
* external.cc (fillout_pinfo): Use more foolproof method for scanning for pids.
* pinfo.cc (set_myself): Eliminate myself_identity.init.
* sigproc.cc (wait_sig): Do it here instead to reduce the amount of time where
there could potentially be two processes with the same pid.
* spawn.cc (spawn_guts): Eliminate duplicate initialization.
* include/sys/cygwin.h: Mark unused PID_* elements.

winsup/cygwin/sigproc.cc

@@ -1202,6 +1202,11 @@ wait_sig (VOID *)
       if (!SetEvent (child_proc_info->subproc_ready))
 	system_printf ("SetEvent (subproc_ready) failed, %E");
       ForceCloseHandle (child_proc_info->subproc_ready);
+      /* Initialize an "indirect" pid block so that if someone looks up this
+	 process via its Windows PID it will be redirected to the appropriate
+	 Cygwin PID shared memory block. */
+      static pinfo NO_COPY myself_identity;
+      myself_identity.init (cygwin_pid (myself->dwProcessId), PID_EXECED);
     }
 
   SetEvent (wait_sig_inited);