Hello! Looking at libs/regex/test/Jamfile, I'm puzzled by the following part: [ run config_info/regex_config_info.cpp <template>test : : : <test-info>always_show_run_output ] [ run config_info/regex_config_info.cpp <template>test : : : <test-info>always_show_run_output : regex_dll_config_info ] The name of second tests suggests it should somehow test the regex library built as DLL, or something. However, there are no other differences between the tests, and test name does not affect anything at all. I did verify that running the second tests links to a static version of Boost.Regex, and that the generated library has no dynamic links to any boost libraries, just the system ones. So, it looks like tests are completely identical. Is that a bug? Maybe, the second test using be using <template>test-dll? - Volodya