Thanks! And along those lines, this should help with a custom name:

--buildid=ID            Adds the specified ID to the name of built

                         libraries.  The default is to not add anything.

From: Boost-users [mailto:boost-users-bounces@lists.boost.org] On Behalf Of Steve Lorimer
Sent: Tuesday, January 29, 2013 5:17 PM
To: boost-users@lists.boost.org
Subject: Re: [Boost-users] Custom library names

On 30 January 2013 09:18, John Lilley <john.lilley@redpoint.net> wrote:

-- Our software simultaneously runs 32-bit and 64-bit versions of itself, and things are easier if the library names reflect this (e.g. inject _x64_ and _x86_ into the names).

from ./b2 --help

  --layout=<layout>       Determines whether to choose library names

                          and header locations such that multiple

                          versions of Boost or multiple compilers can

                          be used on the same system.

                              versioned - Names of boost binaries

                              include the Boost version number, name and

                              version of the compiler and encoded build

                              properties.  Boost headers are installed in a

                              subdirectory of <HDRDIR> whose name contains

                              the Boost version number.

                              tagged -- Names of boost binaries include the

                              encoded build properties such as variant and

                              threading, but do not including compiler name

                              and version, or Boost version. This option is

                              useful if you build several variants of Boost,

                              using the same compiler.

                              system - Binaries names do not include the

                              Boost version number or the name and version

                              number of the compiler.  Boost headers are

                              installed directly into <HDRDIR>.  This option

                              is intended for system integrators who are

                              building distribution packages.

                          The default value is 'versioned' on Windows, and

                          'system' on Unix.

Not sure about putting your own label in the name