Re: [boost] setting <cxxflags> and <linkflags> in Jamfile?

Subject: Re: [boost] setting <cxxflags> and <linkflags> in Jamfile?
From: Steven Watanabe (watanabesj_at_[hidden])
Date: 2013-02-14 14:13:28

AMDG

On 02/12/2013 12:13 AM, Oliver Kowalke wrote:
> Hello,
> 
> if the define BOOST_USE_XYZ is given at b2/bjam command-line how can I set
> special compiler- and linker-flags in the Jamfile?
> 
> something like this:
> 
> Jamfile.v2:
> 
> *project boost/abc
>     : requirements
>      <toolset>gcc-4.7,<defined>BOOST_USE_XYZ:<cxxflags>-fxyz
>      <toolset>gcc-4.7,<defined>BOOST_USE_XYZ:<linkflags>"-static-libxyz"
>       <link>static
>       <threading>multi
>     : source-location ../src
>     : usage-requirements
>         <link>shared:<define>BOOST_ABC_DYN_LINK=1
>     ;
> *
> if the lib is build with b2 toolset=gcc cxxflags="-DBOOST_USE_XYZ" then
> -fxyz static-libxyz is applied to the compiler otherwise not.
> How can I achieve this behaviour?
> 

You should use define=BOOST_USE_XYZ instead of cxxflags,
and <define>BOOST_USE_XYZ in the Jamfile.  However, it's
probably to use

feature xyz : on : optional propagated composite ;
feature.compose <xyz>on : <define>BOOST_USE_XYZ ;
<toolset>gcc-4.7,<xyz>on:<cxxflags>-fxyz
...
bjam ... xyz=on
...

In Christ,
Steven Watanabe