Re: [boost] C++11 variant of the gcc toolset?

Subject: Re: [boost] C++11 variant of the gcc toolset?
From: Peter Dimov (lists_at_[hidden])
Date: 2013-12-19 05:46:59

Peter Dimov wrote:
> Steven Watanabe wrote:
>
> > import feature ;
> > feature.feature cxx11 : on : optional composite propagated ;
> > feature.compose <cxx11>on : <toolset>gcc:<cxxflags>-std=c++11 ;
>
> Thanks Steven. Putting this in my user-config.jam works in that it creates 
> the feature and allows me to use it, but it doesn't actually seem to 
> pass -std=c++11 to the compiler.

In this thread:

http://boost.2283326.n4.nabble.com/Building-OpenMP-targets-td4650306.html

it's claimed that feature.compose doesn't parse its second argument 
properly, which is why the above doesn't work, although it's supposed to.

This, however, works:

import feature ;
import toolset ;

using gcc ;

feature.subfeature toolset gcc : std : cxx11 : optional composite propagated 
;
feature.compose <toolset-gcc:std>cxx11 : <cxxflags>-std=c++11 ;

and is actually better for my needs, because it supports building for both 
C++03 and C++11 at once:

b2 toolset=gcc,gcc-cxx11