This tutorial shows how to compile and run a few sample Smalltalk
applications from pal-st/src-st/examples

(1) Make a folder for your compiled components, and cd into it

> mkdir example-components
> cd example-components

(2) Compile the hello world program in ../src/Hello:

> pal-st -cp ../src/Hello -o hello.prc -serviceMainClass Hello Hello.st

"-cp": Class path, where to find source files, can take multiple
      directories using the appropriate separation character

"-o": The component file to generate, all the compiled classes are
      stored in this component.  The file name is used as the name of
      the component.

"-serviceMainClass": If the component is used to instantiate a service
      (see below), create an instance of this class and call the "run"
      method to activate the service.

(3) Run the hello world program

> pal-vm hello.prc

(4) Compile in  ../src/HelloClasses:

> cd ../src/HelloClasses; make

"-requires": Indicate a component which is required by this component,
     meaning that the required component must be loaded before this
     component.  The symbol before ':' indicates the name by which the
     required component is accessible in this component.  The symbol
     after ':' indicates the name of the component which is used when
     loading the component and for managing the component inside the
     service.

"-import": Make the name of a class from a required component visible
     in the scope of this component.  Essentially shortcuts the
     standard scoping mechanism for components, primarily to allow
     inheritance across components (the name of a superclass defined
     in a required component must be importet into this component).