From mboxrd@z Thu Jan  1 00:00:00 1970
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Date: Mon, 17 Oct 2005 22:17:36 +0200
From: Philippe Gerum <rpm@xenomai.org>
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Subject: Re: [Xenomai-help] compiling xenomai on x86_64
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To: Jan Kiszka <kiszka@domain.hid>
Cc: xenomai@xenomai.org

Jan Kiszka wrote:
> Philippe Gerum wrote:
> 
>>Heikki Lindholm wrote:
>>
>>
>>>Jan Kiszka kirjoitti:
>>>
>>>
>>>>Heikki Lindholm wrote:
>>>>
>>>>
>>>>>Jan Kiszka kirjoitti:
>>>>>
>>>>>
>>>>>
>>>>>>Hi,
>>>>>>
>>>>>>I'm dumb x86 user who unfortunately just seem to have tumbled in the
>>>>>>cross-compilation trap: I'm trying to generate i586 code on a fancy
>>>>>>new
>>>>>>and fast x86_64 compilation host. I got the kernel compiled with
>>>>>>ARCH=i386, using only the pre-installed compiler (i.e. no dedicated
>>>>>>cross tool chain), but I failed to compile xenomai against that kernel
>>>>>>in the following. Which magic switch do I have to apply and where?
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>As dumb a guess: -m32 compiler switch?
>>>>>
>>>>
>>>>
>>>>Yes, I know, that would help. But where to feed this argument into the
>>>>build system?
>>>
>>>
>>>
>>>I would try makefile (and perhaps config/kconfig/Makefile*) and
>>>command line 'CC="gcc -m32" CXX="gcc -m32" make menuconfig/install' to
>>>be sure.
>>>
>>
>>You should be able to do that just by reconfiguring:
>>
>>cd build && make reconfig CC="gcc -m32"
>>
> 
> 
> ... would have been too easy: :-/
> 
> [after "make menuconfig ARCH=i386"]
> gcchost2:/tmp/xenomai/build # make reconfig CC="gcc -m32"
> make[1]: Entering directory `/tmp/xenomai/build'
> configure: error: unrecognized option: -m32
> Try `/tmp/xenomai/configure --help' for more information.
> make[1]: *** [config.status] Error 1
> make[1]: Leaving directory `/tmp/xenomai/build'
> make: *** [reconfig] Error 2
> 

make reconfig CC="\"gcc -m32\""

(Ok, ok, we'll get rid of autoconf for kernel modules in 2.1...)

-- 

Philippe.