Re: [Boost-build] Configuring a project for an number of different options and conditions

Subject: Re: [Boost-build] Configuring a project for an number of different options and conditions
From: Steven Watanabe (watanabesj_at_[hidden])
Date: 2013-12-22 10:31:22

AMDG

On 12/22/2013 04:12 AM, Jess Peterson wrote:
> Let us say for example that I have six or so different builds of the boost
> libraries.  Some are built from source with certain compilers, some are
> installed from binary versions that others have built.  Some have one
> layout, some another.  I want to specify the configuration of each
> (includepath, librarypath, layout) and the conditions under which they
> should be used (target-os, toolset).  Of course, all that the developers
> should need to do is specify which libraries they want to use (e.g.
> /boost/file_system) and have the correct one used for whatever build they
> are attempting.
> 
> My best guess at an answer is to write a boost.jam similar to python.jam or
> qt?.jam or contrib/boost.jam that allows one to specify several "using
> boost" versions with conditions and then either generate the 180 or so "lib
> xxx" commands and let b2 pick the right ones based on the conditions,

This is the standard way to handle the problem.
However, note that you can't include multiple
versions of the Boost sources in a single build.
They conflict because they use the same project names.

> or
> generate the 30 or so "lib xxx" commands that are appropriate for the
> current build.

There is no such thing as the current build.
Boost.Build can handle multiple distinct builds
concurrently.

>  Which would be better or is there some easier solution?
> 

In Christ,
Steven Watanabe