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6.5 libstubs - automatic library opening

The Amiga OS shared libraries are a nice thing. All the tasks can use them in parallel, they eat up memory only if you use them and they are simple to use - and all this works even without a memory management unit (MMU).

Another nice feature is the fact that you can open them under program control, i.e. you can take some action if they do not exist - warn the user, disable some features, etc. This nice feature becomes a misfeature if you only need a certain list of functions that are there all the time - exec, dos, intuition - you still have to open the shared libraries.

So most Amiga compilers have a feature called automatic library opening feature. This means that all libraries you reference (by calling one of the functions) but don't open yourself get opened for you by the compiler.