Mimimal runtime library

[Frits van Bommel]

Lukas Lädrach wrote:
> Hi everybody,
> 
> I'm looking for the absolute minimal set of files in phobos i _need_ to run a full featured D application.
> This means that I don't want to have any unneeded functionality in these files, only the framework to make the language complete.
> 
> For me, this would mean:
> - Object and Interface base 
> - Type info
> - Exception handling
> - Startup system (ctor/dtor handling, __main, _main)
> 
> Only as stubs
> - GC
> - System interface
> - Stdc lib
> - Thread
> 
> Has someone an idea? Walter?

Tango has this stuff separated; you may want to take a look at 
<http://www.dsource.org/projects/tango/browser/trunk>, especially 
lib/compiler/* (and lib/gc/stub/gc.d for malloc/free 'GC', easily 
modified if needed).
You'll probably also want at least part of lib/common/*. For example, 
Exception.d includes some error handler functions called by 
lib/compiler, and the definitions of the exception classes they throw.

I do think you missed a few items in your first list though. For 
example: associative arrays, dynamic casting, array concatenation, and 
64-bit math on 32-bit systems all need runtime support in order to 
function properly.

Other than providing those as well, I think the only requirement this 
doesn't fit is that the Thread in lib/common/Thread.d isn't a stub. That 
should be easy enough to fix if you prefer a stub, though.