[Boost-build] [bbv2] Bug with project hierarchies and use-project?

From: Johan Nilsson (r.johan.nilsson_at_[hidden])
Date: 2006-06-20 08:44:51

Hi,

I haven't updated my local copy of Boost from CVS (RC_1_34_0) for a couple 
of months due to firewall misconfiguration here.

After updating the sources yesterday, my own project build (using bbv2) 
suddenly stopped working. It looks like building a target in a project 
subdirectory, only the project requirements specified in the project root 
directory and the current directory were applied - not any requirements from 
intermediate-level projects.

I checked the latest changes for the project.jam module, and found the 
change at revision 1.115.2.4 with the following comments:

# While "build-project" and "use-project" can potentially refer
# to child projects from parent projects, we don't immediately
# loading child projects when seing those attributes. Instead,
# we record the minimal information that will be used only later.

I reverted the change in my local copy, and my project started building as 
usual again. After trying to get a repeatable test case I found out that it 
was the 'use-project' rule in combination with the above change that caused 
the problem - but only when invoking the build from the subdirectory.

I'm really not sure whether this is a user error from my side or a bug in 
Boost.Build, but I'm attaching a zipped archive with a project hierarchy 
that exhibits the problem. Unzip the archive, set BOOST_BUILD_PATH in the 
environment, change to the src/foo/bar directory and enter 'bjam' to see the 
problem. Then try commenting out the 'use-project' statement in the root 
Jamfile to see the build pass.

// Johan

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end