* cygwin.din (ualarm): New export.

* dcrt0.cc (_dll_crt0): Add experimental tls storage declaration.
(dll_crt0): Ditto.
* debug.cc (thread_stub): Ditto.
* thread.cc: Minor cleanup.
(__pthread_create): Add experimental tls storage declaration.
* miscfuncs.cc: Define tls index.
* winsup.h: Declare experimental tls storage.
* window.cc (alarm): Use old timer return from setitimer.
(ualarm): New function.

winsup/cygwin/winsup.h

@@ -272,4 +272,11 @@ extern HMODULE cygwin_hmodule;
 #define winsock_active (wsadata.wVersion < 512)
 extern struct WSAData wsadata;
 
+#ifdef EXPCGF
+#define DECLARE_TLS_STORAGE char **tls[4096] __attribute__ ((unused))
+#else
+#define DECLARE_TLS_STORAGE do {} while (0)
+#define _WINBASE2_H
+#endif
+
 #endif /* defined __cplusplus */