- libuv dependency is added

Build-PyTorch-and-LibTorch-on-Windows-ARM64.md

@@ -25,6 +25,34 @@
 
 1. Install [Rust](https://static.rust-lang.org/rustup/dist/x86_64-pc-windows-msvc/rustup-init.exe)
 
+1. Building [libuv](https://github.com/libuv/libuv.git) (v1.39.0) from source (we'll use the folder path in [Build](#build))
+
+   - Open `ARM64 Native Tools Command Prompt for VS2022` from start menu
+   - Change path to the suitable folder
+   - Run following command to build `libuv` 
+
+   ```cmd
+   git clone https://github.com/libuv/libuv.git -b v1.39.0
+
+   cd libuv
+
+   echo Clean folder...
+   git clean -fxd
+
+   echo Configuring libuv...
+   mkdir libuv\build
+   cd libuv\build
+   cmake .. -DBUILD_TESTING=OFF
+
+   echo Building libuv...
+   cmake --build . --config Release
+
+   echo Installing libuv...
+   cmake --install . --prefix ../install
+
+   pause
+   ```
+
 1. **(OPTIONAL)** You may install [sccache](https://github.com/mozilla/sccache/releases) for speeding up future builds by cache support.
 
    - You need to add `sccache` to your `PATH` **manually**.
@@ -82,7 +110,7 @@
     
       > "C:\Program Files\Microsoft Visual Studio\2022\Preview\VC\Auxiliary\Build\vcvarsarm64.bat" arm64
    
-   
+
 
 ## Setting Environment Variables
 1. Set the following environment variables:
@@ -92,6 +120,14 @@
    set USE_LAPACK=1
    set MSSdk=1
    set DISTUTILS_USE_SDK=1
+   :: please change {YOUR_LIBUV_FOLDER} to the your libuv folder
+   set libuv_ROOT={YOUR_LIBUV_FOLDER}\install
+   ```
+
+1. Copy `libuv` dll to the `lib` folder to include it for packaging (please check: [Prerequisites](#prerequisites))
+
+   ```cmd
+   copy %libuv_ROOT%\lib\Release\uv.dll torch\lib\uv.dll
    ```
 
 1. **(OPTIONAL)** If you want to use `sccache` for speeding up your future build by cache also set following.