INSTALL.md

Linux

sudo apt-get install make gcc bison git python python-setuptools
sudo easy_install pypng

git clone git://github.com/bentley/rgbds.git
cd rgbds
sudo make install
cd ..

git clone --recursive git://github.com/TheFakeMateo/RedPlusPlus.git
cd RedPlusPlus

To build pokered.gbc and pokeblue.gbc:

make

To build them individually:

make red
make blue

Mac

In the shell, run:

xcode-select --install
sudo easy_install pypng

git clone git://github.com/bentley/rgbds.git
cd rgbds
sudo make install
cd ..

git clone --recursive git://github.com/TheFakeMateo/RedPlusPlus.git
cd RedPlusPlus

make

Windows

It is probably easiest to just follow This Video Tutorial. Just use this project's url instead of the vanilla Pokered url.

Original instructions are below:

To build on Windows, use Cygwin. Use the default settings.

Then get the most recent version of rgbds. Extract the archive and put rgbasm.exe, rgblink.exe and rgbfix.exe in C:\cygwin\usr\local\bin.

In the Cygwin terminal:

install $(lynx -source rawgit.com/transcode-open/apt-cyg/master/apt-cyg) /bin
apt-cyg install make git python gettext

lynx -source bootstrap.pypa.io/get-pip.py | python
pip install pypng

git clone --recursive https://github.com/TheFakeMateo/RedPlusPlus.git
cd RedPlusPlus

make

"pokered.gbc" will be the "Normal" version and "pokeblue.gbc" will be the "Hard" version.