id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
7105	"not possible to build  boost with property ""threading=single"""	Dieter.Stach@…		"got bjam error on build platform linux ( e.g redhat5) 

<pre>
./bjam  variant=debug link=static threading=single

Building the Boost C++ Libraries.


Performing configuration checks

    - has_icu builds           : no
warning: Graph library does not contain MPI-based parallel components.
note: to enable them, add ""using mpi ;"" to your user-config.jam
    - iconv (libc)             : yes
    - icu                      : no
    - icu (lib64)              : no
    - gcc visibility           : yes
    - long double support      : yes
warning: skipping optional Message Passing Interface (MPI) library.
note: to enable MPI support, add ""using mpi ;"" to user-config.jam.
note: to suppress this message, pass ""--without-mpi"" to bjam.
note: otherwise, you can safely ignore this message.
/build/boost_1_50_0/tools/build/v2/build/virtual-target.jam:1079: in virtual-target.register-actual-name from module virtual-target
error: Duplicate name of actual target: <pstage/lib>libboost_system.a
error: previous virtual target { common%common.copy-libboost_system.a.STATIC_LIB { gcc%gcc.archive-libboost_system.a.STATIC_LIB { gcc%gcc.compile.c++-error_code.o.OBJ { error_code.cpp.CPP } } } }
error: created from ./stage-proper
error: another virtual target { common%common.copy-libboost_system.a.STATIC_LIB { gcc%gcc.archive-libboost_system.a.STATIC_LIB { gcc%gcc.compile.c++-error_code.o.OBJ { error_code.cpp.CPP } } } }
error: created from ./stage-proper
error: added properties: <threading>single <warnings>all
error: removed properties: <threading>multi <warnings>on
/build/boost_1_50_0/tools/build/v2/build/virtual-target.jam:490: in actualize-no-scanner from module object(file-target)@3325
/build/boost_1_50_0/tools/build/v2/build/virtual-target.jam:135: in object(file-target)@3325.actualize from module object(file-target)@3325
/build/boost_1_50_0/tools/build/v2/build-system.jam:749: in load from module build-system
/build/boost_1_50_0/tools/build/v2/kernel/modules.jam:283: in import from module modules
/build/boost_1_50_0/tools/build/v2/kernel/bootstrap.jam:142: in boost-build from module
/build/boost_1_50_0/boost-build.jam:17: in module scope from module
</pre>

o Does work up to  version Boost 1.49.0"	Bugs	closed	To Be Determined	Building Boost	Boost 1.50.0	Problem	fixed