[Boost-build] multiple levels not allowed in project hierarchy names?

From: Greg Landrum (greg.landrum_at_[hidden])
Date: 2008-04-07 00:26:18

[apologies for the repost, but there's been no response and I've now
confirmed the problem with the newest boost release.]

Hello,

I'm trying to do a simple boost.build project with a bit
of hierarchy. The directory tree is:
BoostBuildSample/
  Jamroot  <- defines project BoostBuildSample
  a/
     Jamfile   <- defines project BoostBuildSample/a
     a.cpp
     a1/
        Jamfile   <- defines project BoostBuildSample/a/a1
        a1.cpp
     a2/
        Jamfile   <- defines project BoostBuildSample/a/a2
        a2.cpp
  b/
     Jamfile   <- defines project BoostBuildSample/b
     b.cpp
     b1/
        Jamfile   <- defines project BoostBuildSample/b/b1
        b1.cpp
A copy of the source is at URL:
http://www.rdkit.org/BoostBuildSample.tgz

In the file BoostBuildSample/a/a2/Jamfile I define the following
target which I attempt to make dependent on the target a1 in project
/BoostBuildSample/a/a1 and the target a in /BoostBuildSample/a:

lib a2 : a2.cpp
 /BoostBuildSample/a//a   # (0) fine!
 #../../a/a1//a1  # (1) this works
 #/BoostBuildSample/a//a1 # (2) this "works"
 /BoostBuildSample/a/a1//a1  # (3) this does not
 ;

the first dependency, labeled (0), is no problem. But getting the
dependency on /BoostBuildSample/a/a1//a1 is problematic. I list three
forms, the first two, (1) and (2), work without problems (though form
(2) will build more than just the target a1), but form (3) fails
sometimes.
If I execute bjam in the directory BoostBuildSample or
BoostBuildSample/a things build fine, including that a2
project/target. However, if I execute bjam in directory
BoostBuildSample/a/a2, I get the following error:

~/BoostBuildSample/a/a2 > bjam
Building Boost.Regex with the optional Unicode/ICU support disabled.
Please refer to the Boost.Regex documentation for more information
(don't panic: this is a strictly optional feature).
error: Unable to find file or target named
error:     '/BoostBuildSample/a/a1//a1'
error: referred from project at
error:     '.'

Am I doing something wrong (not hard to believe) or is this a bug of
some description?

In case it matters, this occurs with the previous bjam version:
Boost.Build V2 (Milestone 11)
Boost.Jam 03.1.13
as well as the most recent:
Boost.Build V2 (Milestone 12)
Boost.Jam 03.1.16

I'm test this with boost 1.34.1 and 1.35.0 built from source under Ubuntu 7.10

Sorry if this is answered in the docs, but I haven't been able to find it.

Thanks for any help,
-greg