Installation of GBDK on Mac OS 10.14.4

Follow instructions at: https://hackaday.io/project/16188-game-boy-cartridge-plus-programmer/log/49145-programming-game-boy-games-on-a-mac-in-2016

Below we paste a copy of the contents of above's URL in case it is not accesible at some point. All credit to its author.

Instructions from hackaday.io

First - get homebrew if you haven't.

http://brew.sh/

/usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"

brew install wget

Then follow this for installing gbdk, or do what's in the box.

https://github.com/dunn/homebrew-formulae

brew tap mistydemeo/formulae
brew install --HEAD mistydemeo/formulae/gbdk

Then start a new.c file with your text editor of choice

nano new.c

and copy this example I borrowed from the credited site

// http://www.loirak.com/gameboy/gbprog.php

#include <gb/gb.h>
#include <stdio.h>

void main()
{
        printf("Welcome to GAMEBOY\nProgramming");
        printf("\nPress Start");
        waitpad(J_START);  // other keys are J_A, J_UP, J_SELECT, etc.
        printf("\nIsn't it easy!");
}

Run the compiler

lcc -o new.gb new.c

Lastly, get mGBA to emulate your "game" - example

Installation on Ubuntu 18.04.2 LTS

GBDK installation

Method 1: Official GBDK installation

Download the latest release from http://gbdk.sourceforge.net/. In this case, gbdk-2.96a-i586-pc-linux2.2.tar.gz.
Extract the compressed file (Presuming that the file was downloaded to $HOME/Downloads directory):

$ tar xzf $HOME/Downloads/gbdk-2.96a-i586-pc-linux2.2.tar.gz -C $HOME/

Move the gbdk folder to a permanent directory like /opt:

sudo mv gbdk /opt/gbdk

Method 2: Instructions from gheja/gbdk repository

Follow instructions from https://github.com/gheja/gbdk.

Below we paste an adapted copy of the contents of above's URL in case it is not accesible at some point. All credit to its author.

First, install the required packages:

sudo apt-get -y install make gcc g++ bison flex

Then, proceed to compile the binaries using the Makefile located in the root folder of the cloned repo:

sudo make install

Export binaries folder

After completing either method 1 or 2, add the bin folder to PATH environment variable. Edit the $HOME/.bashrc file (or equivalent, if that is the case) and include the following:

# GameBoy Development Kit

PATH=/opt/gbdk/bin:$PATH

To check if this binary is accessible from any directory, run the following command:

$ lcc -v

If the steps have been successful so far, the result will be similar to this one:

lcc $Id: lcc.c,v 1.6 2001/10/28 18:38:13 michaelh Exp $

Testing GBDK installation: Hello World

We are creating a simple example to check everything is working. We will use the mGBA emulator, available from Snap package manager:

sudo snap install mgba

Let's create a blank file using our favorite text editor. This is a simple example adapted from mrombout/gbdk_playground repository:

// ## Hello World example ##
// It shows a welcome text, then ask the player
// to press Start button to show a confirmation message.

#include <gb/gb.h>
#include <stdio.h>

void main() {

    printf("Hello World!");

    printf("\n\nPress Start");
    waitpad(J_START);

    printf("\nLet's go!");

}