Windows has instructions for building with three possible terminals, if users encounter unexpected errors in following instructions for one of the terminals. These instructions are:
> Note for advanced users: **WSL2** is an option and is even faster than **WSL1** if files are stored on the WSL2 file system, but some tools may have trouble interacting with the WSL2 file system over the network drive. For example, tools which use Qt versions before 5.15.2 such as [porymap](https://github.com/huderlem/porymap) may [have problems with parsing the `\\wsl$` network drive path](https://bugreports.qt.io/browse/QTBUG-86277).
All of the Windows instructions assume that the default drive is C:\\. If this differs to your actual drive letter, then replace C with the correct drive letter when reading the instructions.
**A note of caution**: As Windows 7 is officially unsupported by Microsoft and Windows 8 has very little usage, some maintainers are unwilling to maintain the Windows 7/8 instructions. Thus, these instructions may break in the future with fixes taking longer than fixes to the Windows 10 instructions.
WSL1 is the preferred terminal to build **pokeemerald**. The following instructions will explain how to install WSL1 (referred to interchangeably as WSL).
- If WSL (Debian or Ubuntu) is **not installed**, then go to [Installing WSL1](#Installing-WSL1).
- Otherwise, if WSL is installed, but it **hasn't previously been set up for another decompilation project**, then go to [Setting up WSL1](#Setting-up-WSL1).
- Otherwise, **open WSL** and go to [Choosing where to store pokeemerald (WSL1)](#Choosing-where-to-store-pokeemerald-WSL1).
1. Open [Windows Powershell **as Administrator**](https://i.imgur.com/QKmVbP9.png), and run the following command (Right Click or Shift+Insert is paste in the Powershell).
3. The next step is to choose and install a Linux distribution from the Microsoft Store. The following instructions will assume Ubuntu as the Linux distribution of choice.
> Note for advanced users: Advanced users can pick a preferred Linux distribution, but setup instructions may differ. Debian should work with the given instructions, but has not been tested.
4. Open the [Microsoft Store Linux Selection](https://aka.ms/wslstore), click Ubuntu, then click Get, which will install the Ubuntu distribution.
- **right-click** (selection + right click to Copy, right click with no selection to Paste)
- **Ctrl+Shift+C/Ctrl+Shift+V** (enabled by right-clicking the title bar, going to Properties, then checking the checkbox next to "Use Ctrl+Shift+C/V as Copy/Paste").
- Some of the commands that you'll run will ask for your WSL password and/or confirmation to perform the stated action. This is to be expected, just enter your WSL password and/or the yes action when necessary.
2. WSL/Ubuntu will set up its own installation when it runs for the first time. Once WSL/Ubuntu finishes installing, it will ask for a username and password (to be input in).
3. Update WSL/Ubuntu before continuing. Do this by running the following command:
```bash
sudo apt update && sudo apt upgrade
```
> Note: These commands will likely take a long time to finish.
> *Note: If the repository you plan to build was created before 2020/XX/YY (e.g. modifications of pokeemerald that haven't updated) then follow the [legacy WSL1 instructions](docs/legacy_WSL1_INSTALL.md). These repositories can be identified by the [older revision](https://github.com/pret/pokeemerald/blob/571c598/INSTALL.md) of the INSTALL.md*
4. Certain packages are required to build pokeemerald. Install these packages by running the following command:
WSL has its own file system that's not natively accessible from Windows, but Windows files *are* accessible from WSL. So you're going to want to install pokeemerald within Windows.
For example, say you want to store pokeemerald (and agbcc) in **C:\Users\\_\<user>_\Desktop\decomps**. If pokeemerald and/or agbcc hasn't been installed yet, then enter the following command, where *\<user>* is your **Windows** username:
Note that the directory **must exist** in Windows. If you want to store pokeemerald in a dedicated folder that doesn't exist (e.g. the example provided above), then create the folder (e.g. using Windows Explorer) before executing the `cd` command.
Otherwise, ask for help on Discord or IRC (see [README.md](README.md)), or continue reading below for [Windows instructions using msys2](#windows-msys2).
- If devkitARM is **not installed**, then go to [Installing devkitARM](#installing-devkitarm).
- If devkitARM is installed, but msys2 **hasn't previously been set up for another decompilation project**, then go to [Setting up msys2](#setting-up-msys2).
2. Run the devkitPro installer. In the "Choose Components" screen, uncheck everything except GBA Development unless if you plan to install other devkitPro components for other purposes. Keep the install location as C:\devkitPro and leave the Start Menu option unchanged.
4. Change directory to where libpng was downloaded. By default, msys2 will start in the current user's profile folder, located at **C:\Users\\_\<user>_**, where *\<user>* is your Windows username. In most cases, libpng should be saved within a subfolder of the profile folder. For example, if libpng was saved to **C:\Users\\_\<user>_\Downloads** (the Downloads location for most users), enter this command:
```bash
cd Downloads
```
> Note 1: While not shown, msys uses forward slashes `/` instead of backwards slashes `\` as the directory separator.
> Note 2: If the path has spaces, then the path must be wrapped with quotations, e.g. `cd "Downloads/My Downloads"`.
> Note 3: Windows path names are case-insensitive so adhering to capitalization isn’t needed.
> Note 4: If libpng was saved elsewhere, you will need to specify the full path to where libpng was downloaded, e.g. `cd c:/devkitpro/msys2` if it was saved there.
5. Run the following commands to uncompress and install libpng.
At this point, you can choose a folder to store pokeemerald into. If you're okay with storing pokeemerald in the user profile folder, then proceed to [Installation](#installation). Otherwise, you'll need to account for where pokeemerald is stored when changing directory to the pokeemerald folder.
For example, say you want to store pokeemerald (and agbcc) in **C:\Users\\_\<user>_\Desktop\decomps**. If pokeemerald and/or agbcc hasn't been installed yet, then enter the following command to **change directory** to the desired folder:
Note that the directory **must exist** in Windows. If you want to store pokeemerald in a dedicated folder that doesn't exist (e.g. the example provided above), then create the folder (e.g. using Windows Explorer) before executing the `cd` command.
Otherwise, ask for help on Discord or IRC (see [README.md](README.md)), or continue reading below for [Windows instructions using Cygwin](#windows-cygwin).
1. If devkitARM is **not installed**, then follow the instructions used to [install devkitARM](#installing-devkitarm) for the msys2 setup before continuing. *Remember to not continue following the msys2 instructions by mistake!*
- If Cygwin is installed, but **is not configured to work with devkitARM**, then go to [Configuring devkitARM for Cygwin](#configuring-devkitarm-for-cygwin).
To quickly find these, use the search bar and type the name of each package. Ensure that the selected package name is the **exact** same as the one you're trying to download, e.g. `cmake` is **NOT** the same as `make`.
5. For each package, double click on the text that says "**Skip**" next to each package to select the most recent version to install. If the text says anything other than "**Skip**", (e.g. Keep or a version number), then the package is or will be installed and you don't need to do anything.
Cygwin has its own file system that's within Windows, at **C:\cygwin64\home\\_\<user>_**. If you don't want to store pokeemerald there, you'll need to account for where pokeemerald is stored when **changing directory** to the pokeemerald folder.
For example, if you want to store pokeemerald (and agbcc) in **C:\Users\\_\<user>_\Desktop\decomps**, enter this command, where *\<user>* is your **Windows** username:
Note that the directory **must exist** in Windows. If you want to store pokeemerald in a dedicated folder that doesn't exist (e.g. the example provided above), then create the folder (e.g. using Windows Explorer) before executing the `cd` command.
1. If the Xcode Command Line Tools are not installed, download the tools [here](https://developer.apple.com/library/archive/technotes/tn2339/_index.html), open your Terminal, and run the following command:
- Otherwise, **open the Terminal** and go to [Choosing where to store pokeemerald (macOS)](#choosing-where-to-store-pokeemerald-macos)
### Installing libpng (macOS)
> Note for advanced users: This guide installs libpng via Homebrew as it is the easiest method, however advanced users can install libpng through other means if they so desire.
1. Open the Terminal.
2. If Homebrew is not installed, then install [Homebrew](https://brew.sh/) by following the instructions on the website.
Continue to [Installing devkitARM (macOS)](#installing-devkitarm-macos) if **devkitARM is not installed**, otherwise, go to [Choosing where to store pokeemerald (macOS)](#choosing-where-to-store-pokeemerald-macos).
The command with gba-dev will ask for the selection of packages to install. Just press Enter to install all of them, followed by entering Y to proceed with the installation.
At this point, you can choose a folder to store pokeemerald into. If you're okay with storing pokeemerald in the user folder, then proceed to [Installation](#installation). Otherwise, you'll need to account for where pokeemerald is stored when changing directory to the pokeemerald folder.
For example, say you want to store pokeemerald (and agbcc) in **~/Desktop/decomps**. If pokeemerald and/or agbcc hasn't been installed yet, then enter the following command to **change directory** to the desired folder:
Note that the directory **must exist** in the folder system. If you want to store pokeemerald in a dedicated folder that doesn't exist (e.g. the example provided above), then create the folder (e.g. using Finder) before executing the `cd` command.
2. Follow the instructions [here](https://devkitpro.org/wiki/devkitPro_pacman) to install devkitPro pacman. As a reminder, the goal is to configure an existing pacman installation to recognize devkitPro's repositories.
The last command will ask for the selection of packages to install. Just press Enter to install all of them, followed by entering Y to proceed with the installation.
At this point, you can choose a folder to store pokeemerald (and agbcc) into. If so, you'll have to account for the modified folder path when changing directory to the pokeemerald folder.
**Windows users:** Consider adding an exception for the `pokeemerald` and/or `decomps` folder in Windows Security using [these instructions](https://support.microsoft.com/help/4028485). This prevents Microsoft Defender from scanning them which might improve performance while building.
> Note for WSL1: If you get an error stating `fatal: could not set 'core.filemode' to 'false'`, then run the following commands:
>```bash
>cd
>sudo umount /mnt/c
>sudo mount -t drvfs C: /mnt/c -o metadata,noatime
>cd <folderwherepokeemeraldistobestored>
>```
> Where *\<folder where pokeemerald is to be stored>* is the path of the folder [where you chose to store pokeemerald](#Choosing-where-to-store-pokeemerald-WSL1). Then run the `git clone` command again.
2. Install agbcc into pokeemerald. The commands to run depend on certain conditions:
- If agbcc has **not been built before** in the folder where you chose to store pokeemerald, run the following commands to build and install it into pokeemerald:
- **Otherwise**, if agbcc has been built before (e.g. if the git clone above fails), but was **last built on a different terminal** than the one currently used (only relevant to Windows, e.g. switching from msys2 to WSL1), then run the following commands to build and install it into pokeemerald:
> Note: If building agbcc or pokeemerald results in an error, try deleting the agbcc folder and re-installing agbcc as if it has not been built before.
3. Once agbcc is installed, change directory back to the base directory where pokeemerald and agbcc are stored:
To build **pokeemerald.gba** for the first time and confirm it matches the official ROM image (Note: to speed up builds, see [Parallel builds](#parallel-builds)):
If an OK is returned, then the installation went smoothly.
> Note for Windows: if you switched terminals since the last build (e.g. from msys2 to WSL1), you must run `make clean-tools` once before any subsequent `make` commands.
See [the GNU docs](https://www.gnu.org/software/make/manual/html_node/Parallel.html) and [this Stack Exchange thread](https://unix.stackexchange.com/questions/208568) for more information.
`nproc` is not available on macOS. The alternative is `sysctl -n hw.ncpu` ([relevant Stack Overflow thread](https://stackoverflow.com/questions/1715580)).
This project supports the `arm-none-eabi-gcc` compiler included with devkitARM. If devkitARM (a.k.a. gba-dev) has already been installed as part of the platform-specific instructions, simply run:
1.`gdebi-core` must be installed beforehand in order to install devkitPro pacman (which facilitates the installation of devkitARM). Install this with the following command:
2. Once `gdebi-core` is done installing, download the devkitPro pacman package [here](https://github.com/devkitPro/pacman/releases). The file to download is `devkitpro-pacman.amd64.deb`.
3. Change directory to where the package was downloaded. For example, if the package file was saved to **C:\Users\\_\<user>_\Downloads** (the Downloads location for most users), enter this command, where *\<user> is your **Windows** username:
The last command will ask for the selection of packages to install. Just press Enter to install all of them, followed by entering Y to proceed with the installation.
> Note: `devkitpro-pacman.amd64.deb` is the expected filename of the devkitPro package downloaded (for the first command). If the downloaded package filename differs, then use that filename instead.
5. Run the following command to set devkitPro related environment variables (alternatively, close and re-open WSL):
The last command will ask for the selection of packages to install. Just press Enter to install all of them, followed by entering Y to proceed with the installation.
> Note: `devkitpro-pacman.amd64.deb` is the expected filename of the devkitPro package downloaded (for the first command). If the downloaded package filename differs, then use that filename instead.
To build using a toolchain other than devkitARM, override the `TOOLCHAIN` environment variable with the path to your toolchain, which must contain the subdirectory `bin`.
