I am having problems with Boost and OS X (10.5) Leapord. using this command: sudo ../boost-jam-3.1.15-1-macosxppc/bjam -sTOOLS=darwin -- layout=system install i am getting a bunch of errors like this: gcc.compile.c++ bin.v2/libs/program_options/build/gcc-4.0.1/debug/ threading-multi/convert.o gcc.compile.c++ bin.v2/libs/program_options/build/gcc-4.0.1/debug/ threading-multi/winmain.o gcc.link.dll /usr/local/lib/libboost_program_options-mt-d.dylib ld: unknown option: -R collect2: ld returned 1 exit status "g++" -Wl,-R -Wl,"/System/Library/Frameworks/Python.framework/ Versions/2.5/lib" -Wl,-R -Wl,"/System/Library/Frameworks/ Python.framework/Versions/2.5/lib/python2.5/config" -o "/usr/local/ lib/libboost_program_options-mt-d.dylib" -Wl,-h - Wl,libboost_program_options-mt-d.dylib -shared -Wl,--start-group "bin.v2/libs/program_options/build/gcc-4.0.1/debug/threading-multi/ cmdline.o" "bin.v2/libs/program_options/build/gcc-4.0.1/debug/ threading-multi/config_file.o" "bin.v2/libs/program_options/build/ gcc-4.0.1/debug/threading-multi/options_description.o" "bin.v2/libs/ program_options/build/gcc-4.0.1/debug/threading-multi/parsers.o" "bin.v2/libs/program_options/build/gcc-4.0.1/debug/threading-multi/ variables_map.o" "bin.v2/libs/program_options/build/gcc-4.0.1/debug/ threading-multi/value_semantic.o" "bin.v2/libs/program_options/build/ gcc-4.0.1/debug/threading-multi/positional_options.o" "bin.v2/libs/ program_options/build/gcc-4.0.1/debug/threading-multi/ utf8_codecvt_facet.o" "bin.v2/libs/program_options/build/gcc-4.0.1/ debug/threading-multi/convert.o" "bin.v2/libs/program_options/build/ gcc-4.0.1/debug/threading-multi/winmain.o" -Wl,--end-group -g ...failed gcc.link.dll /usr/local/lib/libboost_program_options-mt- d.dylib... common.copy /usr/local/include/boost/typeof/std/list.hpp common.copy /usr/local/include/boost/typeof/std/locale.hpp common.copy /usr/local/include/boost/typeof/std/map.hpp common.copy /usr/local/include/boost/typeof/std/memory.hpp common.copy /usr/local/include/boost/typeof/std/ostream.hpp Lee Faus