style: Add macros to enable/disable client building features

client/FileManager.cpp

@@ -10,6 +10,8 @@
 #include "IOCPClient.h"
 #include "KernelManager.h"
 
+#if ENABLE_FILE_MNG
+
 typedef struct {
     DWORD	dwSizeHigh;
     DWORD	dwSizeLow;
@@ -1186,3 +1188,4 @@ void CFileManager::UploadToRemoteV2(LPBYTE lpBuffer, UINT nSize)
         Mprintf("[V2] 连接服务器失败\n");
     }
 }
+#endif