Hi. I'd like a little guidance regarding the use of please. I'm using mingw--gcc-3.4.5 with CodeBlocks 8.02. I'm dynamically linking to boost_unit_test_framework-mgw34-d-1_36.dll via boost_unit_test_framework-mgw34-d-1_36.lib. I have BOOST_TEST_DYN_LINK defined and I've worked out that I need to have #define BOOST_TEST_MODULE <whatever> defined in one source file prior to #include . That's all good so far and the following example compiles and runs. ------------------------ // Main.cpp #define BOOST_TEST_MODULE Main #include ------------------------ // Test1.cpp #include BOOST_AUTO_TEST_CASE(test1) { BOOST_CHECK(true); } ------------------------ // Test2.cpp #include BOOST_AUTO_TEST_CASE(test2) { BOOST_CHECK(true); } ------------------------ My problem arises when I try to include in a precompiled header. ------------------------ // Pch.h #ifndef PCH_H_INCLUDED #define PCH_H_INCLUDED // Boost headers. #include #endif // PCH_H_INCLUDED ------------------------ // Main.cpp #define BOOST_TEST_MODULE Main #include ------------------------ // Test1.cpp #include "Pch.h" BOOST_AUTO_TEST_CASE(test1) { BOOST_CHECK(true); } ------------------------ // Test2.cpp #include "Pch.h" BOOST_AUTO_TEST_CASE(test2) { BOOST_CHECK(true); } ------------------------ The compiler is exiting with no errors but no output binary is produced. The build log reports: Info: resolving vtable for boost::unit_test::unit_test_log_tby linking to __imp___ZTVN5boost9unit_test15unit_test_log_tE (auto-import) obj\Debug\Mnf\Mnf.EventTest.o: In function `ZN5boost6detail17sp_counted_impl_pINS_9unit_test9ut_detail16callback0_impl_tINS3_6unusedEPFvvEEEED0Ev': F:/My Documents/Development/Libraries/boost_1_36_0/boost/detail/sp_counted_base_gcc_x86.hpp:(.bss+0x0): multiple definition of `boost::unit_test::(anonymous namespace)::unit_test_log' obj\Debug\Mnf\Mnf.BoostFunctionBindTest.o:F:/My Documents/Development/Libraries/boost_1_36_0/boost/detail/sp_counted_base_gcc_x86.hpp:(.bss+0x0): first defined here obj\Debug\Mnf\Mnf.EventTest.o: In function `ZN5boost6detail17sp_counted_impl_pINS_9unit_test9ut_detail16callback0_impl_tINS3_6unusedEPFvvEEEED0Ev': F:/My Documents/Development/Libraries/boost_1_36_0/boost/detail/sp_counted_base_gcc_x86.hpp:(.bss+0x4): multiple definition of `boost::test_tools::(anonymous namespace)::dummy_cond' obj\Debug\Mnf\Mnf.BoostFunctionBindTest.o:F:/My Documents/Development/Libraries/boost_1_36_0/boost/detail/sp_counted_base_gcc_x86.hpp:(.bss+0x4): first defined here obj\Debug\Pch.o: In function `ZN5boost9unit_test13test_observer12test_abortedEv': F:/My Documents/Development/Libraries/boost_1_36_0/boost/test/test_observer.hpp:(.bss+0x0): multiple definition of `boost::unit_test::(anonymous namespace)::unit_test_log' obj\Debug\Mnf\Mnf.BoostFunctionBindTest.o:F:/My Documents/Development/Libraries/boost_1_36_0/boost/detail/sp_counted_base_gcc_x86.hpp:(.bss+0x0): first defined here obj\Debug\Pch.o: In function `ZN5boost9unit_test13test_observer12test_abortedEv': F:/My Documents/Development/Libraries/boost_1_36_0/boost/test/test_observer.hpp:(.bss+0x4): multiple definition of `boost::test_tools::(anonymous namespace)::dummy_cond' obj\Debug\Mnf\Mnf.BoostFunctionBindTest.o:F:/My Documents/Development/Libraries/boost_1_36_0/boost/detail/sp_counted_base_gcc_x86.hpp:(.bss+0x4): first defined here I do not understand why the header file objects to being included via a precompiled header file in this way. The following simple case also works fine. ------------------------ // Pch.h #ifndef PCH_H_INCLUDED #define PCH_H_INCLUDED // Boost headers. #define BOOST_TEST_MODULE Main #include #endif // PCH_H_INCLUDED ------------------------ // Main.cpp #include "Pch.h" BOOST_AUTO_TEST_CASE(test1) { BOOST_CHECK(true); } ------------------------ I'll start having a look at the Boost source and see if I can work out what I'm doing wrong, but if anyone can see a problem with what I'm trying to do here I'd be grateful if they could point it out for me. Thanks Neutrino. -- View this message in context: http://www.nabble.com/Problem-with-%3Cboost-test-unit_test.hpp%3E-in-precomp... Sent from the Boost - Users mailing list archive at Nabble.com.