gogromat/INSTALL_EM_DROPBOX.md

## INSTALL_EM_DROPBOX.md

      
    Raw
  

              INSTALL_EM_DROPBOX.md
            
          
    Install Em-Dosbox on Ubuntu 14.04

Part 1: Install emscripten & clang

Install preprequisites

	#Update the package lists
	sudo apt-get update

	# Install **gcc** (and related dependencies)
	sudo apt-get install build-essential

	# Install cmake
	sudo apt-get install cmake

	# Install Python (by default is bundled with Ubuntu)
	sudo apt-get install python2.7

	# Install node.js
	sudo apt-get install nodejs

	# Install Java
	sudo apt-get install default-jre

	# Install git (optional)
	sudo apt-get install git-core

Install sdl 1.2 library


Only install ~1.2+, NOT SDL 2+. Otherwise it won't work :s

I think you can install it from a package, but maybe you will need to compile it.
If installing from package

I think this should do it:

sudo apt-get install libsdl-image1.2-dev OR
sudo apt-get install libsdl1.2-dev libsdl1.2debian

If compiling manually


Download source code from sdl website here.
Extract to folder of your liking
cd into it
sudo ./configure

If you use Ubuntu x32 you can probably proceed at running make and make install at this point.
If you use Ubuntu x64 you would probably need to fix x11 video reference at this point.
Somehow it does not work, so the steps are the following:

cd /src/video/x11
nano +166 SDL_x11sym.h (because it is around line 166)
add #if 0 and #endif wrapper around this part:

	#if 0 <- add this!
	#ifdef LONG64
	SDL_X11_MODULE(IO_32BIT)
	SDL_X11_SYM(int,_XData32,(Display *dpy,register long *data,unsigned len),(dpy,data,len),return)
	SDL_X11_SYM(void,_XRead32,(Display *dpy,register long *data,long len),(dpy,data,len),)
	#endif
	#endif <- add this!

This should do the trick. Let's continue.

sudo make
sudo make install

Install emsdk


Grab source file from here
Extract to folder of your liking
cd into it

	# Fetch the latest registry of available tools.
	./emsdk update

	# Download and install the latest SDK tools.
	./emsdk install latest

	# Set up the compiler configuration to point to the "latest" SDK.
	./emsdk activate latest

	# Linux/Mac OS X only: Set the current Emscripten path
	source ./emsdk_env.sh

Now it is time to see if you have any prerequisites missing, lol.
If prerequisites are missing (like Java, or node), then the path will
be missing essential binaries.
Check if emconfigure works

Check if you have command emconfigure.
If not, you need to manually add emscripten to the PATH
Add this to ~/.bashrc :

nano ~/.bashrc

export EMSCRIPTEN=/PATH/TO/emsdk/emscripten/master
export EMSCRIPTEN_ROOT=$EMSCRIPTEN:
export PATH=$PATH:$EMSCRIPTEN:


source ~/.bashrc

Check that emcc does not return any error.
Ideally you should see the following:
INFO     root: (Emscripten: Running sanity checks)
WARNING  root: no input files

## Point node to nodejs
- Error ex. "Node is missing, blah blah blah".
- Make sure you have node installed. Test it with "nodejs"
- If it works, modify ~/.emscripten and Change NODE_... with "nodejs"

Part 2: Install em-dosbox

After you are sure that emcc shows no errors or warnings, let's clone em-dosbox.
You will need automake & autoconf packages installed

sudo apt-get install autoconf
git clone https://github.com/dreamlayers/em-dosbox.git
cd into em-dosbox
following commands are better run in bash as root (do exactly as it is listed below)
sudo -s
./autogen.sh
emconfigure ./configure
make

If you are lucky, the horror of installation is almost over.
In /src/ you should see dosbox.html and dosbox.js files
Now you can try opening dosbox.html in your browser.
Better start it as a server:
"Remember that the same origin policy prevent access to data files in some browsers when using file:// URLs."

cd to /src folder
python -m SimpleHTTPServer
in browser go to localhost:8000/dropbox.html

Firefox is probably going to lag, but it's better than Chrome which doesn't even
load for some reason :s.
You can also follow the patches at em-dosbox project's readme.
Packaging games

Next is to change the PYTHON to 'python' inside of src/packager.py.
This file tries to use emscripten's file_packager and uses the mysterious PYTHON variable.
Since script is going to fail, it's time to open it up and change it

nano /src/packager.py
change PYTHON to 'python'

Now we are ready to try running some games!

As a test I recommend to download "Blocks from Hell" from here.
(Do it from under Linux, otherwise it downloads some weird installer)
place blocks into the /src/ folder so it becomes /src/blocks.
cd to /src
Now switch to root in bash: sudo -s
Run ./packager.py blocks blocks.exe
It should create blocks.html file
Go to localhost:8000/blocks.html

If you are lucky, you will be able to play Blocks from Hell! w00t!