[Ecls-list] ECL specific changes for CFFI

[Juan Jose Garcia-Ripoll]

Here is a more or less up to date version of the CFFI backend that includes
almost all changes I could think of. CFFI should now be producing better
code when this code is compiled.

Problems that remain:
* ECL still does not implement an unboxed type that can be associated to
EXT:FOREIGN-DATA.
* ECL still does not inline the functions that operate on foreign objects.
* CFFI still uses CLOS to dispatch operations on foreign objects -- i.e.
additional consing and slowdown.

Juanjo

-- 
Instituto de Física Fundamental, CSIC
c/ Serrano, 113b, Madrid 28006 (Spain)
http://tream.dreamhosters.com
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