Re: [Boost-build] Native-built tools in a cross-compile environment

Subject: Re: [Boost-build] Native-built tools in a cross-compile environment
From: Kylo Ginsberg (kylo_at_[hidden])
Date: 2012-10-19 13:48:22

Perfect!  Thanks so much!!

On Fri, Oct 19, 2012 at 7:34 AM, Steven Watanabe <watanabesj_at_[hidden]> wrote:
> AMDG
>
> On 10/15/2012 05:53 PM, Kylo Ginsberg wrote:
>> I have ported a project using boost-build from Windows (using msvc) to
>> Linux (using gcc), and am now porting it further to a cross-compiled
>> Linux (also using gcc).  I want to support all 3 platforms long-term
>> (Windows, native Linux, cross-compiled Linux).
>>
>> I've put in the basic support for cross-compilation, simply by adding
>> a new "using gcc ..." line.  However, this project uses some
>> code-generating build tools which are built afresh with every build --
>> with my current basic support for cross-compilation, these build tools
>> are cross-built and thus don't run on the build machine.  In short,
>> these need to be native built at all times and I'm not sure how best
>> to specify this.  Is there a best practice for this scenario?
>>
>> I can certainly provide more detail on the organization of the
>> Jamfiles, etc, but figured I'd start with a short-ish note ;>
>>
>
> # user-config.jam
> using msvc ;
> using gcc ;
> import toolset ;
> # globally force the toolset to msvc when building
> # for windows
> toolset.add-requirements <target-os>windows:<toolset>msvc ;
>
> # Jamfile
>
> # force target-os to be the same as host-os
> rule native-tool ( properties * )
> {
>     local host = [ property.select <host-os> : $(properties) ] ;
>     return <target-os>$(host:G=) ;
> }
>
> exe tool : tool.cpp : <conditional>@native-tool ;
>
> If <target-os> isn't sufficient to distinguish
> the host from the target, you can define a new
> feature:
>
> import feature ;
> import toolset ;
> feature.feature native-build : on : optional propagated ;
> toolset.add-requirements <native-build>on:<toolset>gcc-4.7.2 ;
>
> ...
>
> exe tool : tool.cpp : <native-build>on ;
>
> In Christ,
> Steven Watanabe
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