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Editorial Team
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Asked: 2026-05-26T12:21:00+00:00

Under Mac OS X 10.6 I am building a C++ shared library which links

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Under Mac OS X 10.6 I am building a C++ shared library which links to boost 1.46. I am using the command line tools installed with Xcode 4.0.

The 64-bit build works fine. When building for 32-bit, I get the following error message upon linking: 

ld: bad codegen, pointer diff in boost::detail::sp_counted_base::sp_counted_base()to global weak symbol vtable for boost::detail::sp_counted_basefor architecture i386

The only workaround I found is to use g++-4.0 for the 32-bit build. The other compilers I tried (g++-4.2, llvm-g++-4.2 and clang++) all produce the error above.

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  1. Editorial Team

    The problem seems to be fixed in the linker that is installed with XCode 4.2. Upon linking I now get a warning instead of the error message:

    ld: warning: direct access in __ZN5boost6detail15sp_counted_baseC2Ev to global weak symbol __ZTVN5boost6detail15sp_counted_baseE means the weak symbol cannot be overridden at runtime. This was likely caused by different translation units being compiled with different visibility settings.
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