[Boost-build] bbv1: path-global not working with relative paths?

From: Roland Schwarz (roland.schwarz_at_[hidden])
Date: 2006-07-09 14:18:30

While trying to setup a project outside of boost tree I found a problem 
with BOOST_ROOT calculation. Perhaps the path-global is not intended to 
work with relative paths?
But then a comment in the Jamrules in the example directory of python 
let me believe it should work.

Steps to reproduce the problem:

This is my boost tree:
/home/roland/Projects/boost/HEAD

This is my project tree:
/home/roland/Projects/thread_test

The Jamrules file in my project tree:
path-global BOOST_ROOT : ../boost/HEAD ;
project boost : $(BOOST_ROOT) ;

The Jamfile in my project tree:
project-root ;

exe hello
         : hello.cpp
          <lib>@boost/libs/thread/build/boost_thread
         :
         : <threading>multi
         ;

When invoking bjam from my project tree I can see that a wrong 
boost-root is in the -I search path for includes:
     "g++"  -c  -DBOOST_THREAD_LIB_NAME=boost_thread 
-DBOOST_THREAD_BUILD_LIB=1 -g -O0 -fno-inline -pthread -Wall 
-ftemplate-depth-255 -I"bin/boost/libs/thread/build"  -I 
"/home/roland/Projects/boost/boost/HEAD" -o 
"bin/boost/libs/thread/build/libboost_thread.a/gcc/debug/threading-multi/barrier.o" 
"/home/roland/Projects/boost/HEAD/libs/thread/build/../src/barrier.cpp"

The -I "/home/roland/Projects/boost/boost/HEAD" obviously is wrong.

When I set my Jamrules to absolute paths as:
path-global BOOST_ROOT : /home/roland/Projects/boost/HEAD ;
project boost : $(BOOST_ROOT) ;

The include path is calculated correctly:
     "g++"  -c  -DBOOST_THREAD_LIB_NAME=boost_thread 
-DBOOST_THREAD_BUILD_LIB=1 -g -O0 -fno-inline -pthread -Wall 
-ftemplate-depth-255 -I"bin/boost/libs/thread/build"  -I 
"/home/roland/Projects/boost/HEAD" -o 
"bin/boost/libs/thread/build/libboost_thread.a/gcc/debug/threading-multi/barrier.o" 
"/home/roland/Projects/boost/HEAD/libs/thread/build/../src/barrier.cpp"

Am I missing something, or is this a bug?

Regards,
Roland