* Makefile.in (new-cygwin1.dll): Just use -lsupc++ for link.

* sigproc.cc (proc_exists): Change existence criteria.
* sync.h (new_muto): Add volatile to definition to avoid gcc optimization
problems.

winsup/cygwin/sync.h

@@ -48,9 +48,9 @@ extern muto muto_start;
 /* Use a statically allocated buffer as the storage for a muto */
 #define new_muto(__inh, __name) \
 ({ \
-  static __attribute__((section(".data_cygwin_nocopy"))) muto __mbuf; \
+  static volatile __attribute__((section(".data_cygwin_nocopy"))) muto __mbuf; \
   (void) new ((void *) &__mbuf) muto (__inh, __name); \
   __mbuf.next = muto_start.next; \
-  muto_start.next = &__mbuf; \
-  &__mbuf; \
+  muto_start.next = (muto *) &__mbuf; \
+  (muto *) &__mbuf; \
 })