[Boost-build] Putting a project rule in Jamroot produces errors

From: Jeff Holle (jeffreyholle_at_[hidden])
Date: 2007-07-19 12:54:47

I'm using Boost.Build V2 (Milestone 11) Boost.Jam 03.1.15 to build a 
project with 12 shared libraries.

The code for each library is in a separate subdirectory.
The requirements of each library are largely the same making it 
desirable to move the project rule to the Jamroot file in the common 
parent directory.
However, when move my project from my Jamfile to ../Jamroot, I get:

$BOOST_ROOT/boost/tools/build/v2/build/generators.jam:840: in 
try-one-generator-really
*** argument error
* rule object(gcc-linking-generator)@34.run ( project name ? : 
property-set : sources + )
* called with: ( object(project-target)@64 canvas : 
object(property-set)@91 :  )
* missing argument sources
$BOOST_ROOT/boost/tools/build/v2/tools/gcc.jam:391:see definition of 
rule 'run' being called
$BOOST_ROOT/boost/tools/build/v2/build/generators.jam:902: in 
try-one-generator
$BOOST_ROOT/boost/tools/build/v2/build/generators.jam:1110: in 
construct-really
$BOOST_ROOT/boost/tools/build/v2/build/generators.jam:1186: in 
generators.construct
$BOOST_ROOT/boost/tools/build/v2/tools/builtin.jam:490: in 
object(lib-generator)@5.run
$BOOST_ROOT/boost/tools/build/v2/build/generators.jam:840: in 
try-one-generator-really
$BOOST_ROOT/boost/tools/build/v2/build/generators.jam:902: in 
try-one-generator
$BOOST_ROOT/boost/tools/build/v2/build/generators.jam:1110: in 
construct-really
$BOOST_ROOT/boost/tools/build/v2/build/generators.jam:1186: in 
generators.construct
$BOOST_ROOT/boost/tools/build/v2/build/targets.jam:1398: in construct
$BOOST_ROOT/boost/tools/build/v2/build/targets.jam:1242: in 
object(typed-target)@72.generate
$BOOST_ROOT/boost/tools/build/v2/build/targets.jam:765: in generate-really
$BOOST_ROOT/boost/tools/build/v2/build/targets.jam:738: in 
object(main-target)@78.generate
$BOOST_ROOT/boost/tools/build/v2/build/targets.jam:255: in 
object(project-target)@64.generate
$BOOST_ROOT/boost/tools/build/v2/build-system.jam:402: in load
$BOOST_ROOT/boost/tools/build/v2/kernel/modules.jam:261: in import
$BOOST_ROOT/boost/tools/build/v2/kernel/bootstrap.jam:132: in boost-build
$BOOST_ROOT/boost/tools/build/v2/boost-build.jam:8: in module scope

Is it possible to do what I'm trying to do?
If so, how.