Hi, I'm trying to compile a simple unit test using the boost unit test framework, using MS Visual Studio 2008. I can compile the same code on Linux using gcc just fine (and on Windows using MiGW as well, actually). But with Visual Studio, I get the following error: ------ Build started: Project: test, Configuration: Debug Win32 ------ Linking... LINK : warning LNK4098: defaultlib 'MSVCRT' conflicts with use of other libs; use /NODEFAULTLIB:library libboost_test_exec_monitor-vc90-mt-1_35.lib(test_main.obj) : error LNK2019: unresolved external symbol "int __cdecl test_main(int,char * * const)" (?test_main@@YAHHQAPAD@Z) referenced in function "public: void __thiscall test_main_caller::operator()(void)" (??Rtest_main_caller@@QAEXXZ) C:\var\VS_workspace\Debug\test.exe : fatal error LNK1120: 1 unresolved externals Build log was saved at "file://c:\var\VS_workspace\test\Debug\BuildLog.htm" test - 2 error(s), 1 warning(s) ========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ========== this is despite the fact that I'm linking against libboost_test_exec_monitor-vc90-mt-1_35.lib, that would (?) include test_main. here's the Visual C++ linking command parameter list: /OUT:"C:\var\VS_workspace\Debug\test.exe" /INCREMENTAL /NOLOGO /LIBPATH:"C:\usr\boost_1_35_0\lib" /MANIFEST /MANIFESTFILE:"Debug\test.exe.intermediate.manifest" /MANIFESTUAC:"level='asInvoker' uiAccess='false'" /DEBUG /PDB:"C:\var\VS_workspace\Debug\test.pdb" /SUBSYSTEM:CONSOLE /DYNAMICBASE /NXCOMPAT /MACHINE:X86 /ERRORREPORT:PROMPT libboost_unit_test_framework-vc90-mt-1_35.lib libboost_test_exec_monitor-vc90-mt-1_35.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib this unit test sample app I'm trying to work on is very simple: #include using namespace boost::unit_test; void test() { BOOST_CHECK(true); } test_suite * init_unit_test_suite(int, char **) { test_suite *ts = BOOST_TEST_SUITE("Test"); ts->add(BOOST_TEST_CASE(&test)); framework::master_test_suite().add(ts); return 0; } I wonder what I'm doing wrong... Akos