* external.cc (cygwin_internal): Add CW_INIT_EXCEPTIONS to allow cygwin

exception handling on threads not created by cygwin.
* sigproc.cc (proc_terminate): Don't release pinfo structs since we are
exiting.
* include/sys/cygwin.h: Add CW_INIT_EXCEPTIONS.

winsup/cygwin/external.cc

@@ -15,6 +15,7 @@ details. */
 #include "sync.h"
 #include "sigproc.h"
 #include "pinfo.h"
+#include <exceptions.h>
 
 static external_pinfo *
 fillout_pinfo (pid_t pid, int winpid)
@@ -154,6 +155,10 @@ cygwin_internal (cygwin_getinfo_types t, ...)
       case CW_GETPINFO_FULL:
 	return (DWORD) fillout_pinfo (va_arg (arg, pid_t), 1);
 
+      case CW_INIT_EXCEPTIONS:
+	init_exceptions ((exception_list *) arg);
+	return 0;
+
       default:
 	return (DWORD) -1;
     }