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INSTALL.md
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# Prerequisites
| Linux | macOS | Windows 10 (build 18917+) | Windows 10 (1709+) | Windows Vista, 7, 8, 8.1, and 10 (1507, 1511, 1607, and 1703)
| ----- | ----- | ------------------------- | ------------------ | ---------------------------------------------------------
| none | [Xcode Command Line Tools package][xcode] | [Windows Subsystem for Linux 2][wsl2] | [Windows Subsystem for Linux][wsl] | MSYS2 (see below)
| Linux | macOS | Windows 10
| - | - | -
| none | [Xcode Command Line Tools Package][xcode] | [Windows Terminal][terminal] and [Windows Subsystem for Linux (WSL)][wsl]
[xcode]: https://developer.apple.com/library/archive/technotes/tn2339/_index.html#//apple_ref/doc/uid/DTS40014588-CH1-DOWNLOADING_COMMAND_LINE_TOOLS_IS_NOT_AVAILABLE_IN_XCODE_FOR_MACOS_10_9__HOW_CAN_I_INSTALL_THEM_ON_MY_MACHINE_
[wsl2]: https://docs.microsoft.com/windows/wsl/wsl2-install
[xcode]: https://developer.apple.com/library/archive/technotes/tn2339/_index.html
[terminal]: https://docs.microsoft.com/windows/terminal/get-started
[wsl]: https://docs.microsoft.com/windows/wsl/install-win10
The [prerelease version of the Linux subsystem](https://docs.microsoft.com/windows/wsl/install-legacy) available in the 1607 and 1703 releases of Windows 10 is obsolete so consider uninstalling it.
Make sure that the `gcc`, `g++`, `make`, `git`, and `libpng` packages or their equivalents are installed. The package names and installation methods vary with each OS.
Make sure that the `build-essential`, `git`, and `libpng-dev` packages are installed. The `build-essential` package includes the `make`, `gcc-core`, and `g++` packages so they do not have to be obtained separately. MSYS2 does not include `libpng-dev` so it must be built from source.
Install the devkitARM toolchain of devkitPro as per [the instructions on their wiki](https://devkitpro.org/wiki/devkitPro_pacman). On Windows, WSL is the development environment, thus any steps about the Windows installer do not apply.
Install the **devkitARM** toolchain of [devkitPro](https://devkitpro.org/wiki/Getting_Started) and add its environment variables. For Windows versions without the Linux subsystem, the devkitPro [graphical installer](https://github.com/devkitPro/installer/releases) includes a preconfigured MSYS2 environment, thus the steps below are not required.
The following tools are necessary depending on your needs:
export DEVKITPRO=/opt/devkitPro
echo "export DEVKITPRO=$DEVKITPRO" >> ~/.bashrc
export DEVKITARM=$DEVKITPRO/devkitARM
echo "export DEVKITARM=$DEVKITARM" >> ~/.bashrc
* [porymap](https://github.com/huderlem/porymap) for viewing and editing maps
* [poryscript](https://github.com/huderlem/poryscript) for scripting ([VS Code extension](https://marketplace.visualstudio.com/items?itemName=karathan.poryscript))
* [Tilemap Studio](https://github.com/Rangi42/tilemap-studio) for viewing and editing tilemaps
**Windows 10 users:** WSL 2 is included starting in the 2004 release (build 19041) and will eventually become [the default for new installations](https://devblogs.microsoft.com/commandline/the-windows-subsystem-for-linux-build-2020-summary/#wsl2-default), therefore existing WSL 1 and [prerelease WSL](https://docs.microsoft.com/windows/wsl/install-legacy) users are recommended to update. Right-click the Start button and choose System to determine the Windows version.
**Windows 7 and 8.1 users:** pret is no longer focusing on support in pokeemerald for [old versions of Windows](https://support.microsoft.com/help/13853) so consider upgrading to a current release of Windows 10 or try a third-party guide like [this one](https://www.pokecommunity.com/showthread.php?t=425246) instead.
# Installation
@ -33,22 +36,25 @@ To set up the repository:
cd ../pokeemerald
To build **pokeemerald.gba** and confirm it matches the official ROM image:
To build **pokeemerald.gba** for the first time and confirm it matches the official ROM image:
make compare
## Notes
If an OK is returned, then the installation went smoothly.
* If the base tools are not found on macOS in new Terminal sessions after the first successful build, run `echo "if [ -f ~/.bashrc ]; then . ~/.bashrc; fi" >> ~/.bash_profile` once to prevent the issue from occurring again. Verify that the `devkitarm-rules` package is installed as well; if not, install it by running `sudo dkp-pacman -S devkitarm-rules`.
* If the repository was previously set up using Cygwin, delete the `.exe` files in the subfolders of the `tools` folder except for `agbcc` and try building again. [Learn the differences between MSYS2 and Cygwin.](https://github.com/msys2/msys2/wiki/How-does-MSYS2-differ-from-Cygwin)
# Guidance
# Start
To build **pokeemerald.gba** with your changes:
make
**macOS users:** If the base tools are not found in new Terminal sessions after the first successful build, run `echo "if [ -f ~/.bashrc ]; then . ~/.bashrc; fi" >> ~/.bash_profile` once to prevent the issue from occurring again. Verify that the `devkitarm-rules` package is installed as well; if not, install it by running `sudo dkp-pacman -S devkitarm-rules`.
# Building guidance
## Parallel builds
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.
@ -59,19 +65,22 @@ To speed up building, run:
`nproc` is not available on macOS. The alternative is `sysctl -n hw.ncpu` ([relevant Stack Overflow thread](https://stackoverflow.com/questions/1715580)).
## Building without dependency scanning
If only `.c` or `.s` files were changed, turn off the dependency scanning temporarily. Changes to any other files will be ignored and the build will either fail or not reflect those changes.
## Debug info
make NODEP=1
To build **pokeemerald.elf** with enhanced debug info:
## Building with devkitARM's C compiler
make DINFO=1
## devkitARM's C compiler
This project supports the `arm-none-eabi-gcc` compiler included with devkitARM r52. To build this target, simply run:
make modern
## Building with other toolchains
## Other toolchains
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`.
@ -82,9 +91,3 @@ The following is an example:
make TOOLCHAIN="/usr/local/arm-none-eabi"
To compile the `modern` target with this toolchain, the subdirectories `lib`, `include`, and `arm-none-eabi` must also be present.
## Building with debug info
To build **pokeemerald.elf** with enhanced debug info, use the `DINFO` variable.
make DINFO=1