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我想用铿锵创建boost，我安装了最新的xcode和命令行工具。编译b2现在我尝试：在Mac OS X上使用铛编译错误提升1.53
-mac:boost_1_53_0 tim$ ./b2 toolset=clang cxxflags="-std=c++11 -stdlib=libc++" linkflags="-stdlib=libc++" --prefix="./install-dir" debug release install
，并得到下一个作为输出：
Performing configuration checks
- 32-bit : no
- 64-bit : yes
- x86 : yes
- 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) : 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.
/Users/tim/Desktop/Work/boost_1_53_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: <pinstall-dir/lib>libboost_atomic.dylib
error: previous virtual target { clang-darwin%clang-darwin.link.dll-libboost_atomic.dylib.SHARED_LIB { clang-darwin%clang-darwin.compile.c++-lockpool.o.OBJ { lockpool.cpp.CPP } } }
error: created from libs/atomic/build/boost_atomic
error: another virtual target { clang-darwin%clang-darwin.link.dll-libboost_atomic.dylib.SHARED_LIB { clang-darwin%clang-darwin.compile.c++-lockpool.o.OBJ { lockpool.cpp.CPP } } }
error: created from libs/atomic/build/boost_atomic
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
/Users/tim/Desktop/Work/boost_1_53_0/tools/build/v2/build/virtual-target.jam:490: in actualize-no-scanner from module object(file-target)@67176
/Users/tim/Desktop/Work/boost_1_53_0/tools/build/v2/build/virtual-target.jam:135: in object(file-target)@67176.actualize from module object(file-target)@67176
/Users/tim/Desktop/Work/boost_1_53_0/tools/build/v2/build-system.jam:749: in load from module build-system
/Users/tim/Desktop/Work/boost_1_53_0/tools/build/v2/kernel/modules.jam:283: in import from module modules
/Users/tim/Desktop/Work/boost_1_53_0/tools/build/v2/kernel/bootstrap.jam:142: in boost-build from module
/Users/tim/Desktop/Work/boost_1_53_0/boost-build.jam:17: in module scope from module
所以我有一个基本的问题：如何解决这样的错误？