On 07/11/2009 18:48, Daniel Peebles wrote:
You can use -fvia-C and -keep-hc-files but the generated C code is
pretty platform-dependent (at least in terms of word sizes and so
on... it may be possible to port across platforms with the same word
sizes?), and probably won't help you cross-compile. It also doesn't
look much like any c code any human would have written, and I think
there are plans to deprecate the via-C compilation pathway eventually.
If you are looking to add cross-compilation to GHC, the first thing
I'd look at is detaching the choice of native code generator from the
preprocessor and hooking it up to a front-end command-line option
instead :)
We already compile in all the NCG backends, so that should be quite
straightforward. What's much harder is arranging the rest of your
cross-compilation environment - assembler, linker etc., and making sure
you're using the right configuration parameters from the target machine
for the build. It's generally easier to get an unregisterised port
working first, and then use that to bootstrap an NCG/registerised version.
Someone on IRC (his username is dumael, not sure what his
real name is) has already been working on an ARM native code generator
for GHC recently.
Interesting, I didn't know that. There's also the iPhone GHC port,
which is unregisterised, I believe.
>The recent LLVM back-end development should also
make it pretty simple to generate code for other platforms (especially
if we have a nice way to pass front-end options to the code
generators)
Definitely, I think that will be a nice side-effect of the LLVM backend.
Cheers,
Simon
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