Re: [Boost-build] generating headers out of Jamfile

Subject: Re: [Boost-build] generating headers out of Jamfile
From: Vladimir Prus (vladimir_at_[hidden])
Date: 2011-01-30 08:52:04

Oliver Kowalke wrote:

> Am 30.01.2011 14:08, schrieb Vladimir Prus:
>> Oliver Kowalke wrote:
>>
>>> Am 30.01.2011 13:49, schrieb Vladimir Prus:
>>>> Oliver Kowalke wrote:
>>>>
>>>>> Am 29.01.2011 09:17, schrieb Vladimir Prus:
>>>>>> Oliver Kowalke wrote:
>>>>>>
>>>>>>> Am 29.01.2011 08:59, schrieb Vladimir Prus:
>>>>>>>> FWIW, I am working on a patch to have those features always set for gcc, and
>>>>>>>> hopefully for other compilers for which they can be reliably inferred. It's the
>>>>>>>> top thing on my Boost.Build queue.
>>>>>>>
>>>>>>> that are good news - what is your time-frame for this feature?
>>>>>>
>>>>>> I think I have the hardest bit done. Should complete in a week or so (on trunk).
>>>>>
>>>>> do you consider ABI (sysv, eabi, aapcs, etc.)
>>>>
>>>> Not really. Can you actually change abi that a given g++ binary uses?
>>>>
>>>>> and Binary-Format
>>>>> (elf,mach-o, etc.) too?
>>>>
>>>> Again, I don't think you can change this, for given architecture/target-os. Am I wrong?
>>>>
>>>> - Volodya
>>>
>>> you are not wrong but I won't change the abi or binary-format - I'd like
>>> to use both properties to select the correct assembler code in the Jamfile.
>>
>> Should not you then be able to use architecture and target os, for the same purpose?
> 
> sure target-os and architecture are used for the selection too (I use
> <architecture>,<instruction-set>,<address-model>,<abi>,<binary-format>).
> 
> <abi> and <binary-format> are required because the target os may support
> different ABIs (for instance MIPS supports multiple ABIs: o32, n32, n64,
> o64, eabi)

Is there a gcc option to control this? Can gcc reveal the default abi? If so,
I am sure an 'abi' feature can be made to have always have a value when you
have MIPS gcc.

> or binary-formats (MAC OS X: elf, mach-o).

Or, I though it's always mach-o. What switch does control this? Again, how
can gcc report which is the default?

- Volodya

-- 
Vladimir Prus
Mentor Graphics
[phone]