Reported by Nikolaus Schaller, Apr 3, 2012
http://sourceware.org/ml/libffi-discuss/2009/msg00016.html this would make the NSMethodSignature and NSInvocation code more portable.
Comment 1 by Nikolaus Schaller, Apr 3, 2012
the gcc internal libffi is only used for gcj (java) and not easily available. So better use libffi on the system: https://github.com/atgreen/libffi/blob/master/doc/libffi.info Debian Squeeze uses 3.0.9 (libffi5)
Comment 2 by Nikolaus Schaller, Apr 12, 2012
This is not sufficient since we have to convert forward:: into an NSInvocation. And this is beyond libffi.
Comment 3 by Nikolaus Schaller, May 14, 2012
Has been solved without libffi