Fail instead of falling back to includes.

ericsnowcurrently · ericsnowcurrently · commit 0f4a50b55d7f · 2022-12-09T16:06:40.000-07:00
diff --git a/Include/internal/pycore_signal.h b/Include/internal/pycore_signal.h
@@ -14,10 +14,10 @@ extern "C" {
 
 #ifdef MS_WINDOWS
 #  ifndef SOCKET
-#    include <winsock2.h>          // SOCKET
+#    error "<winsock2.h> must be included before this header"
 #  endif
 #  ifndef HANDLE
-#    include <windows.h>           // HANDLE
+#    error "<windows.h> must be included before this header"
 #  endif
 #endif
 #include <signal.h>                // NSIG
diff --git a/Modules/signalmodule.c b/Modules/signalmodule.c
@@ -13,7 +13,6 @@
 #include "pycore_moduleobject.h"  // _PyModule_GetState()
 #include "pycore_pyerrors.h"      // _PyErr_SetString()
 #include "pycore_pystate.h"       // _PyThreadState_GET()
-#include "pycore_signal.h"        // Py_NSIG
 
 #ifndef MS_WINDOWS
 #  include "posixmodule.h"
@@ -29,6 +28,8 @@
 #  endif
 #endif
 
+#include "pycore_signal.h"        // Py_NSIG
+
 #ifdef HAVE_SIGNAL_H
 #  include <signal.h>
 #endif
