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POReference to __sync_fetch_and_add_4 in boost 1.48 32-bit build not resolved
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copied!<p>I recently built 32-bit Boost 1.48 on a 64-bit machine using gcc 4.5, using these instructions:</p> <pre><code>./bootstrap.sh --prefix=$INSTALL_PREFIX --exec-prefix=$INSTALL_PREFIX --with-libraries=system,filesystem,python --with-python=python2 ./b2 address-model=32 architecture=x86 install </code></pre> <p>Compilation seems fine and libraries are correctly placed into the installation folder. But when I try to link libboost_filesystem.so to one of my programs I get the following error:</p> <pre><code>/gpfs/wizard/flight/analysis/mori/GGSINSTALL/install/lib/libboost_filesystem.so: undefined reference to `__sync_fetch_and_add_4' collect2: ld returned 1 exit status </code></pre> <p>I manage my code using CMake; these are the flags I use to configure the 32-bit build:</p> <pre><code>-DCMAKE_C_FLAGS=-m32 -DCMAKE_CXX_FLAGS=-m32 </code></pre> <p>I don't know if I'm doing something wrong in Boost configuration or in my software configuration via CMake flags, but I suspect Boost. I found some discussions on this topic (eg. <a href="https://stackoverflow.com/questions/7994614/undefined-reference-to-sync-fetch-and-add-4">undefined reference to sync_fetch_and_add_4</a>) but they almost always refer to other architectures like arm or report solutions which I don't know how to implement in boost build (eg. passing a -march=i486 to gcc, how can this be done with bjam?). Can anybody give me some hints, please? Thanks.</p>

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