Cygwin: drop __stdcall usage

Signed-off-by: Corinna Vinschen <corinna@vinschen.de>

winsup/cygwin/autoload.cc

@@ -382,10 +382,10 @@ wsock_init (struct func_info *func)
 
   if (!wsock_started)
     {
-      int __stdcall (*wsastartup) (int, WSADATA *);
+      int (*wsastartup) (int, WSADATA *);
 
       /* Don't use autoload to load WSAStartup to eliminate recursion. */
-      wsastartup = (int __stdcall (*)(int, WSADATA *))
+      wsastartup = (int (*)(int, WSADATA *))
 		   GetProcAddress ((HMODULE) (dll->handle), "WSAStartup");
       if (wsastartup)
 	{

winsup/cygwin/dcrt0.cc

@@ -1006,7 +1006,7 @@ __cygwin_exit_return:			\n\
 ");
 }
 
-extern "C" void __stdcall
+extern "C" void
 _dll_crt0 ()
 {
   /* Starting with Windows 10 rel 1511, the main stack of an application is

winsup/cygwin/lib/cygwin_crt0.c

@@ -9,7 +9,7 @@ details. */
 #undef __INSIDE_CYGWIN__
 #include "crt0.h"
 
-extern void __stdcall _dll_crt0 ()
+extern void _dll_crt0 ()
   __declspec (dllimport) __attribute__ ((noreturn));
 
 /* for main module */

winsup/cygwin/winsup.h

@@ -147,7 +147,7 @@ extern int cygserver_running;
 class per_process;
 /* cygwin .dll initialization */
 void dll_crt0 (per_process *) __asm__ (_SYMSTR (dll_crt0__FP11per_process));
-extern "C" void __stdcall _dll_crt0 ();
+extern "C" void _dll_crt0 ();
 void dll_crt0_1 (void *);
 void dll_dllcrt0_1 (void *);