Subject: Re: [Boost-build] bug? bultin properties not set
From: Oliver Kowalke (k-oli_at_[hidden])
Date: 2010-04-02 10:03:47
Vladimir Prus schrieb:
> Rene Rivera wrote:
>> Oliver Kowalke wrote:
>>> Rene Rivera schrieb:
>>>> Oliver Kowalke wrote:
>>>>> bjam --debug-building does notcontain the builtin properites such
>>>>> as <architecture>, <address-model>, <instruction-set>. But
>>>>> <target-os> is set. Because the User Handbook doesn't tell anything
>>>>> why some of the bultin props are not set (props of the target
>>>>> os/platform) I assume it is a bug.
>>>>> May this be correct?
>>>> Those three properties you mention, architecture, address-model, and
>>>> instruction-set, are defined as optional. Hence they are not set by
>>>> default. This fits the model of compilers to have a default for
>>>> those that they compile to.
>>> Does boost.build provide functions returning the correct values or do
>>> I have to implement those by myself?
>> I'm not sure what you are asking here. Do you want some programatic
>> way to find out what the compilers default values are? Or do you want
>> to know what the possible values BBv2 has for those?
>> For the latter they are listed in builtin.jam
>> Note that the ability to actually specify those and have them take
>> effect in building depends on whether the toolset has mappings for
>> them to the corresponding compiler options. BUt you can always specify
>> them and then add your own options based on them.
> Note that I do plan to automatically set at least address-model based on
> information from gcc -- but this is likely to be only available for gcc.
I need to know for which architecture, address-model the code has to be
compiled (choosing the correct assembler code).
The build must work if the user specifies/doesn't specify the properties
on command line:
bjam toolset=gcc address-model=64 architecture=ppc
bjam toolset=intel architecture=x86_64
I used target-alternatives in order to added/exclude asm from the build.
Unfortunately the builtin properties are not set by default.
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