add builing.md

BUILDING.md

@@ -0,0 +1,46 @@
+# Building font-render-tester
+
+## Requirements
+
+__Font-Render-Tester__ is written in C++ and the build script is set to expect C++23 level of feature set.  At the moment only [Visual Studio 2022](https://visualstudio.microsoft.com/) is extensively compiled against. If you are using other compilers and have issues with, please feel free to report an issue or submit a pull request.
+
+In order to compile with __Visual Studio 2022__, it must be setup with C++ features. Make sure to install __Desktop development with C++__ workload.
+
+This project requires [CMake](https://cmake.org/) and [VCPKG Library Manager](https://github.com/microsoft/vcpkg). Please follow the installation instruction of each tools.
+
+Also, the environment `VCPKG_ROOT` is needed and it should point to the root directory of __VCPKG__ (eg. `c:\vcpkg`)
+
+## Building with IDE
+
+### Visual Studio Code
+Microsoft's [CMake Tools](https://marketplace.visualstudio.com/items?itemName=ms-vscode.cmake-tools) Extension is recommended.
+
+You should be able to open the project in Visual Studio Code and it will automatically setup anything needed, given that you have the C++ extension installed. 
+
+Upon the configure step at the first, the IDE will ask for the configure preset to use. Please select the `default` preset as it will setup build to use __VCPKG__. 
+
+### Visual Studio 2022
+
+In __Visual Studio 2022__, use `Open a local folder` or `File->Open->Folder...` in order to open the project.
+
+Upon opening the project, __Visual Studio__ will configure the project. This includes downloading any dependencies the project needs. 
+
+After the configure step is done, you should be able to run or debug the project right away.
+
+## Building with command line
+
+1. Change directory into the source directory.
+2. Run the following command:
+   ```sh
+   $ cmake --preset=default
+   ```
+   This will create a build directory call `build` and configure the project inside that directory. 
+
+   The configuring process includes downloading dependencies from the __VCPKG__ repository and building those dependencies. This will take a while.
+3. To build the project, run the following command:
+    ```sh
+    $ cmake --build ./build --config=Release
+    ```
+
+The executable files, along with required dll files and font files will be created at `<source_dir>/build/Release`.
+