Testing out boost beta 1.34. I built the whole she-bang with the gcc toolset. I tried compling my unit tests and they all get: /usr/lib/gcc/x86_64-redhat-linux/4.1.1/../../../../lib64/crt1.o: In function `_start': (.text+0x20): undefined reference to `main' collect2: ld returned 1 exit status I don't use the auto test case mechanism. My tests suites look like: #include "boost/test/unit_test.hpp" using boost::unit_test::test_suite; void free_test_function() { BOOST_CHECK(1 == 1); } test_suite* init_unit_test_suite( int, char* [] ) { test_suite* test= BOOST_TEST_SUITE( "Unit test example 1" ); test->add( BOOST_TEST_CASE( &free_test_function ) ); return test; } I compile using g++ -Wall -I/usr/local/include/boost-1.34 -o unit_test unit_test_test.cpp -L/usr/local/lib64 -lboost_unit_test_framework-gcc41-mt-d If i define BOOST_TEST_DYN_LINK either in the cpp file before or after the unit_test.hpp include, or specifify it using -D on the command line I get the same results. I tried to look through the headers responsible for defining BOOST_TEST_DYN_LINK but theres a lot of references to "msvc auto-linking" which I of course do not use. Should I be defining BOOST_ALL_DYN_LINK ? I recall it not being set somewhere because boost.build v2 doesn't like it or something. Really i can't make heads or tails of what I should be defining, whether I shouldve defined something when building the unit test libs, or whether I should be defining something building my own. The docs say something about defining BOOST_TEST_DYN_LINK but as stated above, it doesn't seem to make a difference. Chris