86Box/doc/build.md

Building
========
In order to compile 86Box from this repository, please follow this step-by-step guide:

1. Install the [MSYS2](https://www.msys2.org/) environment. The rest of the guide will refer to the directory that you install it to (C:\msys32 or C:\msys64 by default) as the MSYS2 root.

2. Launch your MSYS2 environment using the `MSYS2 MinGW 32-bit` shortcut. If you do not want to use the shortcut, launch it using the `mingw32.exe` executable in the MSYS2 root.

3. Once launched, you should update the environment:
   ```console
   $ pacman -Syu
   ```
   You may need to do this twice, just follow the on-screen instructions. Make sure you re-run the command periodically to keep the environment up-to-date.

4. Run the following command to install all of the dependencies: 
   ```console
   $ pacman -S gdb make git mingw-w64-i686-toolchain mingw-w64-i686-openal mingw-w64-i686-freetype mingw-w64-i686-SDL2 mingw-w64-i686-zlib mingw-w64-i686-libpng
   ```

5. Once the environment is fully updated and all dependencies are installed, change to the `src` directory of the 86Box source:
   ```console
   $ cd path/to/86Box/src
   ```

6. Start the actual compilation process:
   ```console
   $ make -f win/Makefile.mingw
   ```
   By default, `make` does not run parallely. If you want it to use more threads, use the `-j` with the number of threads you want to use for the compilation process, i.e. `-j4`.

7. If the compilation succeeded (which it almost always should), you will find `86Box.exe` in the `src` directory.

8. In order to test your fresh build, replace the `86Box.exe` in your current 86Box environment with your freshly built one. If you do not have a pre-existing 86Box environment, download the latest successful build from http://ci.86box.net, and the latest ROM set from https://github.com/86Box/roms.

9. Enjoy using and testing the emulator! :)

If you encounter issues at any step or have additional questions, please join
the IRC channel or the appropriate channel on our Discord server and wait patiently for someone to help you.