Hi, The following simple test signals SIGSEGV when line ***1 is uncommented. When I recompile Boost.Test and the tests with same project requirements (see below) everything is OK. Is this the correct behavior? Should -ansi be set in a coherent way? Note. I have no issue mixing -ansi with clang-3.0. Thanks, Vicente P.S. I could attach the complete logs if needed (not so big) ============================= #include <boost/test/unit_test.hpp> void test_1() { BOOST_CHECK(true); } boost::unit_test::test_suite* init_unit_test_suite(int, char*[]) { boost::unit_test::test_suite* test = BOOST_TEST_SUITE("test suite"); test->add(BOOST_TEST_CASE(test_1)); test->add(BOOST_TEST_CASE(test_1)); test->add(BOOST_TEST_CASE(test_1)); test->add(BOOST_TEST_CASE(test_1)); test->add(BOOST_TEST_CASE(test_1)); //test->add(BOOST_TEST_CASE(test_1)); // *** 1 return test; } ============================= Here it is the log ============================= darwin.link ../../../bin.v2/libs/thread/test/test_ansi.test/darwin-4.7.0x/debug/test_ansi "/usr/local/gcc-4-7-svn/bin/g++" -o "../../../bin.v2/libs/thread/test/test_ansi.test/darwin-4.7.0x/debug/test_ansi" "../../../bin.v2/libs/thread/test/test_ansi.test/darwin-4.7.0x/debug/test_ansi.o" "../../../bin.v2/libs/test/build/darwin-4.7.0x/debug/link-static/libboost_unit_test_framework.a" -g testing.capture-output ../../../bin.v2/libs/thread/test/test_ansi.test/darwin-4.7.0x/debug/test_ansi.run "../../../bin.v2/libs/thread/test/test_ansi.test/darwin-4.7.0x/debug/test_ansi"

"../../../bin.v2/libs/thread/test/test_ansi.test/darwin-4.7.0x/debug/test_ansi.output" 2>&1 status=$? echo >> "../../../bin.v2/libs/thread/test/test_ansi.test/darwin-4.7.0x/debug/test_ansi.output" echo EXIT STATUS: $status >> "../../../bin.v2/libs/thread/test/test_ansi.test/darwin-4.7.0x/debug/test_ansi.output" if test $status -eq 0 ; then cp "../../../bin.v2/libs/thread/test/test_ansi.test/darwin-4.7.0x/debug/test_ansi.output" "../../../bin.v2/libs/thread/test/test_ansi.test/darwin-4.7.0x/debug/test_ansi.run" fi verbose=0 if test $status -ne 0 ; then verbose=1 fi if test $verbose -eq 1 ; then echo ====== BEGIN OUTPUT ====== cat "../../../bin.v2/libs/thread/test/test_ansi.test/darwin-4.7.0x/debug/test_ansi.output" echo ====== END OUTPUT ====== fi exit $status ====== BEGIN OUTPUT ====== Running 6 test cases... unknown location:0: fatal error in "test_1": signal: SIGSEGV, si_code: 0 (memory access violation at address: 0x00000000) test_ansi.cpp:5: last checkpoint *** 1 failure detected in test suite "Master Test Suite" ============================= Here there are the client project requirements ============================= project : requirements <warnings>all <toolset>darwin:<cxxflags>-ansi ;