[Haskell-iPhone] ghc-iphone and TemplateHaskell

[Stephen Blackheath [to GHC-iPhone]]

Stefan,

If you build the stage 2 compiler using the stage 1 compiler, then the
stage 2 compiler will only be able to run on the iPhone!

What you need to do is change the options used in building the stage 1
compiler.


Steve

On 27/01/11 03:57, Stefan Kersten wrote:
> hi steve,
> 
> On 20.01.11 22:16, Stephen Blackheath [to GHC-iPhone] wrote:
>> The reason why Template Haskell doesn't work on the current GHC-iPhone
>> compiler is because when I tweaked the build to cross compile, I just
>> took the Stage 1 compiler as the cross compiler.  And, by default, the
>> stage 1 compiler doesn't support TH.
> 
> ah, ok, that explains it! ;)
> 
>> It is most likely just a matter of throwing a switch in the build
>> somewhere.  I believe the TH code is interpreted, so the ARM back end
>> should not be an issue.  Unfortunately, fixing this is nowhere near my
>> priority list at the moment.
> 
> ok, no problem.
> 
>> If you want to attempt it, I've given detailed instructions on how to
>> build the compiler, so you should have no trouble.  It builds well on
>> Snow Leopard, and takes about an hour or so.  I'll help with answering
>> questions as much as I can.
> 
> i've built the iphone-simulator compiler by patching ghc-6.10.4 and also using
> 6.10.4 for compilation; thanks for the detailed build instructions! the build
> succeeded, but now i'll need your help; the very last output is (probably as
> expected):
> 
> # Cross compile: We don't actually build the compiler in stage 2.
> #make -C compiler stage=2
> # Cross compile: We only need a selection of the utils in 'utils' built for the
> target
> #make -C utils with-stage-2
> # Build ghc-pkg in stage 2 because it needs different default directories
> # to the one we built in stage 1.  (The makefile forces it to be built for the
> build host.)
> make -C utils/ghc-pkg with-stage-2
> make[2]: Nothing to be done for `with-stage-2'.
> 
> i've built the stage2 compiler with make -C compiler stage=2, but i'm not sure
> how to modify the build script to actually install that compiler. any ideas?
> 
> thanks,
> <sk>
>