[Haskell-cafe] build and use ghc's rts without a full unregistered ghc port?

[Korcan Hussein]

I did initially thought about it and had reservations but you convinced me so I've been trying out jhc. Seems a lot more promising but unfortunately I had problems, here's my targets.ini:

[wii]
cc=powerpc-eabi-gcc
byteorder=be
gc=static
cflags+=-DGEKKO -mrvl -mcpu=750 -meabi -mhard-float
executable_extension=.elf
bits=32

bits_max=64

Trying to compile a simple hello world haskell program resulted in the following error message:

hs.out.elf_code.c:118:2: error: #error Could not determine bitsize
hs.out.elf_code.c:150:24: error: sys/select.h: No such file or directory
hs.out.elf_code.c:154:25: error: sys/utsname.h: No such file or directory
...
...

For the first error I looked at the line and there is some pre-processor conditional code to determine the word size, this seems a bit odd since i've already specified these in the target.ini I would assume that they would get passed in to the compiler as extra defines.

More depressing is the last two lines, which looks like a POSIX compatible environment is required with jhc it seems. Having a look at devkitPPC include directory it seems it does implement some POSIX headers but those particular headers certainly do not exist in there.

Anyway I'll send a message to the jhc mailing list about it.

----------------------------------------
> Date: Sat, 24 Jul 2010 20:51:39 +1000
> Subject: Re: [Haskell-cafe] build and use ghc's rts without a full unregistered ghc port?
> From: mwotton at gmail.com
> To: korcan_h at hotmail.com
> CC: haskell-cafe at haskell.org
>
> can't speak as to how difficult it is to get GHC built unregisterised,
> but you might want to consider JHC if you don't need to use a lot of
> Hackage. It compiles to C without a special RTS needed, which might
> make it a lot easier.
>
> mark
>
> On Sat, Jul 24, 2010 at 8:45 PM, Korcan Hussein  wrote:
>>
>> Hi, I was just wondering if this is possible, I would like to use a gcc port
>> which cross compiles to the PPC architecture (Wii DevkitPPC to be specifically:
>> http://wiibrew.org/wiki/DevkitPPC) for a platform that is not POSIX compatible I
>> believe (at least not fully or maybe I'm wrong entirely).
>>
>> Ideally I would make an unregistered port of GHC but the problem is because GHC
>> doesn't support true cross compiling yet I need to bootstrap on to the target
>> machine, which isn't running a POSIX environment.
>>
>> Still I did try to attempt to build with both the host and target set to
>> 'powerpc-unknown-linux' and build it with devkitPPC, I did use a custom build.mk
>> which should pull in all the required dependencies, defines, etc for devkitPPC.
>>
>> In the end I didn't get very far with it, it looked like missing posix functions.
>>
>> I didn't want to spend to much time trying to make it work this way (maybe i'm
>> doing it wrong completely). It's quite possible that I could make this work more
>> easily if I used a linux port for the wii but I would like to avoid the need of
>> using linux on the wii because I guess most home-brew users don't have such a setup.
>>
>> So I thought maybe it's possible with less effort to build GHC's RTS and then
>> compile Haskell in C with the RTS as a library dependency. Is this possible?
>> maybe I'm missing something or doing something stupid?
>>
>> Thanks in advance.
>>
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