Hi, Both these Jamfiles boost/libs/math/test/Jamfile.v2 boost/libs/math/example/Jamfile/v2 contain this line <toolset>intel:<cxxflags>-Qwd264,239 which is, unfortunately, not recognized by the Intel compilers on darwin. "/opt/intel/cc/9.1.037/bin/icpc" -xc++ -w1 -O0 -g -fPIC -Qwd264,239 / nologo -Ob0 -vec-report0 -DBOOST_ALL_NO_LIB=1 - DBOOST_REGEX_DYN_LINK=1 -I".." -c -o "/private/tmp/kbelco/boost/ results/boost/bin.v2/libs/math/test/std_real_concept_check.test/intel- darwin-9.1/debug/macosx-version-10.4/std_real_concept_check.o" "../ libs/math/test/compile_test/std_real_concept_check.cpp" icpc: Command line warning: ignoring unknown option '-Qwd264,239' It may be as easy to fix as this: <toolset>intel-win:<cxxflags>-Qwd264,239 but this is untested. Hmmm, that /nologo option looks like a Windows specific option as well. Here's the man page for -Q for Intel on darwin. Component Control This section describes component control options. You can direct the compiler to specify alternate tools for preprocessing, compilation, assembly, and linking. Further, you can invoke options specific to your alternate tools on the command line. These are the component con- trol options. -Qinstall <dir> Set <dir> as the root of the compiler installation. -Qlocation,<tool>,<path> Set <path> as the location of the tool specified by <tool>. <tool> may be cpp, c, asm, or ld. <path> is the complete path to the tool. For example: -Qlocation,gas,<path> Specifies the GNU assembler. -Qlocation,gld,<path> Specifies the GNU linker. -Qoption,<tool>,<optlist> Pass options <optlist> to the tool specified by <tool>. <tool> may be cpp, c, asm, or ld. The <optlist> argument indicates one or more valid argument strings for the designated program. If the argument is a command-line option, you must include the hyphen. If the argument contains a space or tab character, you must enclose the entire argument in quotation characters (""). You must separate multiple arguments with commas. -- Noel