Re: [boost] Using multiple versions of Boost

From: John Maddock (john_at_[hidden])
Date: 2007-05-17 13:28:14

Bjørn Roald wrote:
>
> Well -namespace=boost_1_34_0 actually does a bit more.  It renames
> directories and include directives so stuff like
>
> #include <boost/filesystem/path.hpp>
>
> becomes
>
> #include <boost_1_34_0/filesystem/path.hpp>
>
> and should work.  It also replaces all instances of BOOST_ prefix in
> preprocessor symbol definitions and references with BOOST_1_34_0_ and
> processes Jamfiles as well so my hope was that all should build, test,
> and work without touch up work.
>
> Also in the general case
>
> ../bin/boost/libs/filesystem/build/libboost_filesystem.a/gcc/debug/libboost_filesystem-gcc-d-1_33_1.a
>
> should become
>
> ../bin/boost_1_34_0/libs/filesystem/build/lib/boost_1_34_0_filesystem.a/gcc/debug/libboost_1_34_0_filesystem-gcc-d-1_33_1.a
>
> In this specific case the additional 1_34_0 substrings are just
> annoyance, so I guess we need to treat it as a special case when we
> have
> a version part of the new namespace.  But as I said library path
> naming
> is not implemented yet.  I guess this can be done by treating some
> configuration files for the build system.  This may be outside the
> scope
> of the bcp tool.
>
> So..  given all this, are you still sure this is worth adding?

Sure, why not.

> Also, is -namespace  the best  name for the command line option?

Yep.

> I have working code and will happily merge with 1.34.0 version of bcp
> and provide you a patch.   Then you can use what you like, fix  what
> you
> like to fix,  and dump what you don't like :-)

OK :-)

Cheers, John.