* exceptions.cc (unused_sig_wrapper): Eliminate unused parameter to asm.

* external.cc (cygwin_internal): Change CW_STRACE_ON to CW_STRACE_TOGGLE.
* strace.cc (strace::hello): Toggle strace on and off.
* sync.cc (muto::init): Renamed from constructor.
* sync.h (muto::new): Delete.
(muto::delete): Ditto.
(new_muto): Simplify.  Use muto.init for nearly everything.
* uinfo.cc (uinfo_init): Avoid closing a NULL handle.
* include/sys/cygwin.h (cygwin_getinfo_types): Rename CW_STRACE_OFF to
CW_STRACE_TOGGLE.  Delete CW_STRACE_OFF.
* include/sys/strace.h (strace): Add "inited" field.

winsup/cygwin/sync.h

@@ -23,17 +23,13 @@ public:
   class muto *next;
   const char *name;
 
-  muto() {}
   /* The real constructor. */
-  muto(int inh, const char *name);
+  muto *init(int inh, const char *name) __attribute__ ((regparm (3)));
 
-  void *operator new (size_t, void *p) {return p;}
-  void *operator new (size_t) {return ::new muto; }
-  void operator delete (void *) {;} /* can't handle allocated mutos
-					currently */
-
-  ~muto ();
-  int acquire (DWORD ms = INFINITE) __attribute__ ((regparm(1))); /* Acquire the lock. */
+#if 0	/* FIXME: See comment in sync.cc */
+  ~muto ()
+#endif
+  int acquire (DWORD ms = INFINITE) __attribute__ ((regparm (1))); /* Acquire the lock. */
   int release ();		     /* Release the lock. */
 
   /* Return true if caller thread owns the lock. */
@@ -48,9 +44,6 @@ extern muto muto_start;
 /* Use a statically allocated buffer as the storage for a muto */
 #define new_muto(__inh, __name) \
 ({ \
-  static volatile __attribute__((section(".data_cygwin_nocopy"))) muto __mbuf; \
-  (void) new ((void *) &__mbuf) muto (__inh, __name); \
-  __mbuf.next = muto_start.next; \
-  muto_start.next = (muto *) &__mbuf; \
-  (muto *) &__mbuf; \
+  static muto __mbuf __attribute__((section(".data_cygwin_nocopy"))); \
+  __mbuf.init (__inh, __name); \
 })