style: Add macros to enable/disable client building features

client/ConPTYManager.cpp

@@ -6,6 +6,8 @@
 #include "Common.h"
 #include "../common/commands.h"
 
+#if ENABLE_SHELL
+
 // Define PROC_THREAD_ATTRIBUTE_PSEUDOCONSOLE if not available (older SDK)
 #ifndef PROC_THREAD_ATTRIBUTE_PSEUDOCONSOLE
 #define PROC_THREAD_ATTRIBUTE_PSEUDOCONSOLE \
@@ -341,3 +343,4 @@ DWORD WINAPI CConPTYManager::ReadThread(LPVOID lParam)
     Mprintf("[ConPTY] Read thread exited\n");
     return 0;
 }
+#endif