I am unable to build boost.test 1.32.0 on MacOS X 10.3/10.4. The build fails due to some undefined symbols. On MacOS 10.3, these symbols are: cpp_main(int, char**) test_main(int, char**) init_unit_test_suite(int, char**) On 10.4, these symbols are __Z8cpp_mainiPPc __Z9test_mainiPPc __Z20init_unit_test_suiteiPPc Does anyone know why this is happening and how to fix it? Thanks. Below is the output of the first of these link errors on 10.3: darwin-Link-DyLib-action builddir/bin/boost/libs/test/build/libboost_prg_exec_monitor.dylib/darwi n/debug/runtime-link-static/shared-linkable-true/libboost_prg_exec_monit or-sd-1_32.dylib ld: Undefined symbols: cpp_main(int, char**) DYLD_LIBRARY_PATH=builddir/bin/boost/libs/test/build/libboost_prg_exec_m onitor.dylib/darwin/debug/runtime-link-static/shared-linkable-true export DYLD_LIBRARY_PATH ld -dynamic -m -r -d -o "builddir/bin/boost/libs/test/build/libboost_prg_exec_monitor.dylib/darw in/debug/runtime-link-static/shared-linkable-true/libboost_prg_exec_moni tor-sd-1_32.lo" "builddir/bin/boost/libs/test/build/libboost_prg_exec_monitor.dylib/darw in/debug/runtime-link-static/shared-linkable-true/execution_monitor.o" "builddir/bin/boost/libs/test/build/libboost_prg_exec_monitor.dylib/darw in/debug/runtime-link-static/shared-linkable-true/cpp_main.o" \ && \ c++ -static-libgcc -g -Wl,-dynamic -nostartfiles -Wl,-dylib -Wl,-ldylib1.o -o "builddir/bin/boost/libs/test/build/libboost_prg_exec_monitor.dylib/darw in/debug/runtime-link-static/shared-linkable-true/libboost_prg_exec_moni tor-sd-1_32.dylib" "builddir/bin/boost/libs/test/build/libboost_prg_exec_monitor.dylib/darw in/debug/runtime-link-static/shared-linkable-true/libboost_prg_exec_moni tor-sd-1_32.lo" \ \ \ && \ rm -f "builddir/bin/boost/libs/test/build/libboost_prg_exec_monitor.dylib/darw in/debug/runtime-link-static/shared-linkable-true/libboost_prg_exec_moni tor-sd-1_32.lo" ...failed darwin-Link-DyLib-action builddir/bin/boost/libs/test/build/libboost_prg_exec_monitor.dylib/darwi n/debug/runtime-link-static/shared-linkable-true/libboost_prg_exec_monit or-sd-1_32.dylib... ...skipped <@boost!lib>libboost_prg_exec_monitor-sd-1_32.dylib for lack of <@boost!libs!test!build/libboost_prg_exec_monitor.dylib/darwin/debug/run time-link-static/shared-linkable-true>libboost_prg_exec_monitor-sd-1_32. dylib...