mingw boost compile attempt

--user-config.jam--
# MinGW32 G++ for cross-compilation of Windows binaries
using gcc : win32 : "/usr/local/mingw/bin/i386-mingw32-g++" ;



--BASH output--

$ ./bjam toolset=gcc-win32 target-os=windows


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)             : no
    - iconv (separate)         : no
    - icu                      : no
    - icu (lib64)              : no
    - ../config//has_gcc_visibility builds : no
    - ../config//has_long_double_support builds : 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.
************************************************************
Trying to build Boost.Thread with pthread support.
If you need pthread you should specify the paths.
You can specify them in site-config.jam, user-config.jam
or in the environment.
For example:
PTW32_INCLUDE=C:\Program Files\ptw32\Pre-built2\include
PTW32_LIB=C:\Program Files\ptw32\Pre-built2\lib
************************************************************
/usr/local/boost_1_48_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: <debug-symbols>off <define>NDEBUG <inlining>full <optimization>speed <runtime-debugging>off <variant>release
error: removed properties: <debug-symbols>on <inlining>off <optimization>off <runtime-debugging>on <variant>debug
/usr/local/boost_1_48_0/tools/build/v2/build/virtual-target.jam:490: in actualize-no-scanner from module object(file-target)@4629
/usr/local/boost_1_48_0/tools/build/v2/build/virtual-target.jam:135: in object(file-target)@4629.actualize from module object(file-target)@4629
/usr/local/boost_1_48_0/tools/build/v2/build-system.jam:749: in load from module build-system
/usr/local/boost_1_48_0/tools/build/v2/kernel/modules.jam:283: in import from module modules
/usr/local/boost_1_48_0/tools/build/v2/kernel/bootstrap.jam:142: in boost-build from module
/usr/local/boost_1_48_0/boost-build.jam:17: in module scope from module