How to write and run a "hello world" program using the command-line compiler:

You need to be in a working directory where you have write permission
(and about 90 meg free disk space); create a file hello_world.e with
a text editor containing the following code:

-------------------------------------------------------------------------------
hello_world.e:
-------------------------------------------------------------------------------

class HELLO_WORLD create
	make
feature
	make
		do
			print("Hello generic world!")
			io.read_line
		end
end

-------------------------------------------------------------------------------

To compile, run:

ec hello_world.e

This will create a binary hello_world in a EIFGENs/hello_world/W_code
subdirectory that can be run from the command line:

cd EIFGENs/hello/W_code
./hello_world

You can also create a portable standalone binary (that will be much smaller
than the one above) in an EIFGENs/hello_world/F_code subdirectory (after
compiling as above to create file hello_world.ecf) as follows:

ec -c_compile -finalize -config hello_world.ecf