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

[Korcan Hussein]

I managed to get a hello world app working on the Wii! but I had to do some hacking of the generated C code because the devkitPPC is missing 2 posix headers referenced in the generated C code from Jhc. The functions the code used from those headers didn't seem completely essential. Basically I set the define JHC_isPosix to 0, commented out problem code. Of-course this isn't ideal, the solution would be to implement the missing headers for devkitPPC.

----------------------------------------
> From: korcan_h at hotmail.com
> To: mwotton at gmail.com
> CC: haskell-cafe at haskell.org
> Subject: RE: [Haskell-cafe] build and use ghc's rts without a full unregistered ghc port?
> Date: Sat, 24 Jul 2010 18:25:56 +0000
>
>
> 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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>>
>>
>>
>> --
>> A UNIX signature isn't a return address, it's the ASCII equivalent of a
>> black velvet clown painting. It's a rectangle of carets surrounding a
>> quote from a literary giant of weeniedom like Heinlein or Dr. Who.
>> -- Chris Maeda
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