IXSelectInterruptPipe.h included in cmake on windows but compiled out

CMakeLists.txt

@@ -36,6 +36,7 @@ set( IXWEBSOCKET_SOURCES
     ixwebsocket/IXNetSystem.cpp
     ixwebsocket/IXSelectInterrupt.cpp
     ixwebsocket/IXSelectInterruptFactory.cpp
+    ixwebsocket/IXSelectInterruptPipe.cpp
     ixwebsocket/IXSocket.cpp
     ixwebsocket/IXSocketConnect.cpp
     ixwebsocket/IXSocketFactory.cpp
@@ -69,6 +70,7 @@ set( IXWEBSOCKET_HEADERS
     ixwebsocket/IXProgressCallback.h
     ixwebsocket/IXSelectInterrupt.h
     ixwebsocket/IXSelectInterruptFactory.h
+    ixwebsocket/IXSelectInterruptPipe.h
     ixwebsocket/IXSetThreadName.h
     ixwebsocket/IXSocket.h
     ixwebsocket/IXSocketConnect.h
@@ -99,12 +101,6 @@ set( IXWEBSOCKET_HEADERS
     ixwebsocket/IXWebSocketVersion.h
 )
 
-if (UNIX)
-    # Linux, Mac, iOS, Android
-    list( APPEND IXWEBSOCKET_SOURCES ixwebsocket/IXSelectInterruptPipe.cpp )
-    list( APPEND IXWEBSOCKET_SOURCES ixwebsocket/IXSelectInterruptPipe.h )
-endif()
-
 # Platform specific code
 if (APPLE)
     list( APPEND IXWEBSOCKET_SOURCES ixwebsocket/apple/IXSetThreadName_apple.cpp)

ixwebsocket/IXSelectInterruptPipe.cpp

@@ -5,8 +5,10 @@
  */
 
 //
-// On macOS we use UNIX pipes to wake up select.
+// On UNIX we use pipes to wake up select. There is no way to do that
+// on Windows so this file is compiled out on Windows.
 //
+#ifndef _WIN32
 
 #include "IXSelectInterruptPipe.h"
 
@@ -144,3 +146,5 @@ namespace ix
         return _fildes[kPipeReadIndex];
     }
 } // namespace ix
+
+#endif // !_WIN32