Working off current CVS, I have the following file... #define BOOST_AUTO_TEST_MAIN #include <boost/test/auto_unit_test.hpp> BOOST_AUTO_UNIT_TEST( test1 ) { BOOST_CHECK(true); } BOOST_AUTO_UNIT_TEST( test2 ) { BOOST_CHECK(true); } as shown in the examples, but when I compile, I get liner errors for missing main and test functions. shandalle:jody> g++ -I${BOOST_ROOT} 5_2_8_1.cpp -o 5_2_8_1 /usr/lib/crt1.o: In function `_start': /usr/lib/crt1.o(.text+0x18): undefined reference to `main' /tmp/cccXBUDu.o: In function `test1()': /tmp/cccXBUDu.o(.text+0xec): undefined reference to `boost::test_tools::tt_detail::check_impl(boost::test_tools::predicate_ result const&, boost::basic_wrap_stringstream<char>&, boost::unit_test::basic_cstring<char const>, unsigned, boost::test_tools::tt_detail::tool_level, boost::test_tools::tt_detail::check_type, unsigned, ...)' /tmp/cccXBUDu.o: In function `test2()': /tmp/cccXBUDu.o(.text+0x242): undefined reference to `boost::test_tools::tt_detail::check_impl(boost::test_tools::predicate_ result const&, boost::basic_wrap_stringstream<char>&, boost::unit_test::basic_cstring<char const>, unsigned, boost::test_tools::tt_detail::tool_level, boost::test_tools::tt_detail::check_type, unsigned, ...)' /tmp/cccXBUDu.o: In function `boost::unit_test::make_test_case(boost::unit_test::callback0<boost::un it_test::ut_detail::unused> const&, boost::unit_test::basic_cstring<char const>)': /tmp/cccXBUDu.o(.gnu.linkonce.t._ZN5boost9unit_test14make_test_caseERKN S0_9callback0INS0_9ut_detail6unusedEEENS0_13basic_cstringIKcEE+0x3b): undefined reference to `boost::unit_test::ut_detail::normalize_test_case_name(boost::unit_test ::basic_cstring<char const>)' /tmp/cccXBUDu.o(.gnu.linkonce.t._ZN5boost9unit_test14make_test_caseERKN S0_9callback0INS0_9ut_detail6unusedEEENS0_13basic_cstringIKcEE+0x70): undefined reference to `boost::unit_test::test_case::test_case[in-charge](boost::unit_test::ba sic_cstring<char const>, boost::unit_test::callback0<boost::unit_test::ut_detail::unused> const&)' /tmp/cccXBUDu.o: In function `boost::unit_test::ut_detail::auto_unit_test_suite()': /tmp/cccXBUDu.o(.gnu.linkonce.t._ZN5boost9unit_test9ut_detail20auto_uni t_test_suiteEv+0x4e): undefined reference to `boost::unit_test::test_suite::test_suite[in-charge](boost::unit_test:: basic_cstring<char const>)' /tmp/cccXBUDu.o: In function `boost::unit_test::ut_detail::auto_unit_test_registrar::auto_unit_test_ registrar[in-charge](boost::unit_test::test_case*)': /tmp/cccXBUDu.o(.gnu.linkonce.t._ZN5boost9unit_test9ut_detail24auto_uni t_test_registrarC1EPNS0_9test_caseE+0x26): undefined reference to `boost::unit_test::test_suite::add(boost::unit_test::test_unit*, unsigned long, unsigned)' collect2: ld returned 1 exit status