[Boost-build] [BOOST][BUILD]Duplicate target

From: Jeremy Pack (rostovpack_at_[hidden])
Date: 2008-04-14 21:19:32

Hi!

Getting an error from Boost.Build. Here's the important part:

/Developer/boost/tools/build/v2/build/virtual-target.jam:1002: in
virtual-target.register-actual-name from module virtual-target
error: Duplicate name of actual target: <pbin/darwin/debug>c.o
error: previous virtual target { darwin%darwin.compile.c++-c.o.OBJ {
c.cpp.CPP } }
error: created from ./ide_server
error: another virtual target { darwin%darwin.compile.c++-c.o.OBJ {
c.cpp.CPP } }
error: created from ./ide_server
error: added properties: <python-debugging>off <python>2.5
<threadapi>pthread
error: removed properties: none

I've looked up some of the information on problems with duplicate target,
but still can't see why I'm having a problem. I've attached a test case that
reproduces the problem.

I've tried to make the test case relatively minimal. Here are some caveats
about it:

   - Boost.Thread is not the problem.
   - If I remove the "install" target, it works.
   - c.cpp is not the problem - it's empty.
   - <link>static is not the problem. I've tried different combinations.
   - The fact that boost_threads is in the sources instead of
   requirements or something makes no difference.
   - Tested on Goobuntu and OS X.

It really seems to be a strange limitation. I've run into it before, but
figured I'd try to get an answer for it this time. For now, I overcome this
by writing scripts to manually copy all of my install dependencies. That can
be a bit of a pain when using as many shared libraries as I am...

For those who hate opening attachments, here's the Jamfile (the rest of the
files are basically empty).

import os ;
local BOOST_ROOT = [ os.environ BOOST_ROOT ] ;
exe ide_server
:
 c.cpp
 $(BOOST_ROOT)libs/thread/build//boost_thread/<link>static ;
install bin_out : ide_server ;

Any ideas?

Jeremy