Matej Spiller-Muys wrote on Mon, 16 Nov 2009:
C interfacing works today and has been very thoroughly tested. cppclass
only works, for very basic things, since 2 days ago or so. Unless someone
enjoys
debugging a new code generator and a new external language interfacing
paradigm at the same time, that does not sound like a very good idea to me.
Absolutely you have a point here. But AFAIK "C++ linking" is part of FPC
roadmap (not part of LLVM discussion at all).
There is no real "FPC roadmap" (the website page on future plans is
just some random things that people picked up on the mailing lists, or
that someone at one point intended to work on). There are only things
that people submit/commit patches for.
Currently, someone appears to be interesting in adding such support,
so it may well be implemented in the future. Or maybe he loses
interest and starts working on something else instead, and then it may
not be.
And LLVM C++ support is at
least currently more feature complete. Finish porting LLVM to C or
supporting C++. The question is what is more maintainable in the end?
No, the question is what do people submit patches for.
Having class VMT, exceptions the same as C++ could be a huge interop benefit
:) And you get the C++ linking for free.
You also get breaking backwards compatibility with a lot of existing
Delphi code for free. I repeat: you really cannot underestimate the
amount of implementation details that existing Delphi code depends on,
and people already complain about FPC's incompatibility with those
implementation details.
Currently LLVM is still quite
evolving.
So is FPC.
And it would be easier to start with code based on CLang (with
some FPC features missing) and later add more FPC features when other
projects "invent" features that C++ does not have (VMKit & Reflection,RTTI).
It should be the faster way to implement LLVM frontend. With currently
implemented clang we could already support 90% of FPC language.
So what is holding you back? Really, trying to convince other people
to do something that you would like to see done (or even worse: to
work on it in the way that you would prefer them to do it) in general
just doesn't work. The only way to achieve your projects is to start
working on them yourself, and hope that other people join in.
http://www.linux-kongress.org/2009/slides/compiler_survey_felix_von_leitner.pdf
Btw how does FPC or Delphi fare in comparison to LLVM, GCC, VC++?
I have no idea. All I know that's slightly related is the alioth
computer language benchmark game (with the stress on "game"), where
you have at least both FPC and GCC results.
Jonas
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