I've noticed something similar. I got basically two sets of the same lib files. For example, libboost_wserialization-vc80-mt-s.lib is exactly the same file (not only size but also contents) as libboost_wserialization-vc80-mt-s-1_33_1.lib -- Hector C. "Drumheller, Michael" <michael.drumheller@boeing.com> wrote: Dear Bjam Experts: For some reason all my source files are getting compiled twice. Below is my Jamfile (stripped to its essentials, and names changed to protect the innocent), and below that is the output (also stripped way down). Sorry for the clutter--I have tried to strip it down to the minimum. Notice how every .obj gets constructed twice. Yet the destination path (vc-7_1\release\threading-multi\ is the same in each case; also, I'm also invoking bjam with precisely that target specified on the command line. Is there anything really obvious to bjam-adjusted eyes going on here? Thank you very much. Michael Drumheller ----------------------------------------------------------cut here: Jamfile--------------------------------------- project-root ; import python ; include python.jam ; FOOCORE_SOURCES = File1 File2 ; FOOCORE_SOURCES = ..\\..\\src\\$(FOOCORE_SOURCES).cpp ; lib Foo : $(FOOCORE_SOURCES) : C:\\Boost\\include\\boost-1_32 <*>WIN32 ..\\..\\src C:\\Python24\\include "C:\\Program Files\\Microsoft Visual Studio .NET 2003\\Vc7\\include" ; ----------------------------------------------------------cut here: resulting output --------------------------- 06-02-26:12:22:26:boost/FooBar=> bjam -sTOOLS=vc-7_1 "-sBUILD=release multi" ...found 3088 targets... ...updating 142 targets... vc-C++ ./build\bin\FooBar\libFoo.lib\vc-7_1\release\threading-multi\File1.obj File1.cpp vc-C++ ./build\bin\FooBar\libFoo.lib\vc-7_1\release\threading-multi\File2.obj File2.cpp ...... vc-Archive ./build\bin\FooBar\libFoo.lib\vc-7_1\release\threading-multi\libFoo.lib Microsoft (R) Library Manager Version 7.10.3077 Copyright (C) Microsoft Corporation. All rights reserved. "./build\bin\FooBar\libFoo.lib\vc-7_1\release\threading-multi\File1.obj" "./build\bin\FooBar\libFoo.lib\vc-7_1\release\threading-multi\File2.obj" ...... vc-C++ ./build\bin\FooBar\libFoo.lib\vc-7_1\release\threading-multi\File1.obj File1.cpp vc-C++ ./build\bin\FooBar\libFoo.lib\vc-7_1\release\threading-multi\File2.obj File2.cpp ...... vc-Archive ./build\bin\FooBar\libFoo.lib\vc-7_1\release\threading-multi\libFoo.lib Microsoft (R) Library Manager Version 7.10.3077 Copyright (C) Microsoft Corporation. All rights reserved. "./build\bin\FooBar\libFoo.lib\vc-7_1\release\threading-multi\File1.obj" "./build\bin\FooBar\libFoo.lib\vc-7_1\release\threading-multi\File2.obj" ...... _______________________________________________ Boost-users mailing list Boost-users@lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users ---------------------------------- --------------------------------- Yahoo! Mail Bring photos to life! New PhotoMail makes sharing a breeze.