* debug.h (being_debugged): New macro.

* dtable.cc (dtable::extend): Use new macro.
* exceptions.cc (try_to_debug): Ditto.
* strace.cc (strace::hello): Only output debugging info when we think we're
being debugged.

winsup/cygwin/debug.h

@@ -28,6 +28,9 @@ DWORD __stdcall WFMO (DWORD, CONST HANDLE *, BOOL, DWORD) __attribute__ ((regpar
 #if !defined(_DEBUG_H_)
 #define _DEBUG_H_
 
+#define being_debugged() \
+  (IsDebuggerPresent () || GetLastError () == ERROR_PROC_NOT_FOUND)
+
 void threadname_init ();
 HANDLE __stdcall makethread (LPTHREAD_START_ROUTINE, LPVOID, DWORD, const char *) __attribute__ ((regparm(3)));
 const char * __stdcall threadname (DWORD, int lockit = TRUE) __attribute__ ((regparm(2)));