When compiling the following small test program with either of the borland compilers: #include <boost/test/test_tools.hpp> class base { }; int main(int argc, char *argvp[]){ BOOST_WARN_MESSAGE(true, "test warning"); } I get the following syntax error: Borland C++ 5.6 for Win32 Copyright (c) 1993, 2002 Borland c:\BoostMainCVS\libs\serialization\test\test_zmisc.cpp: Warning W8057 c:\BoostMainCVS\libs\serialization\test\test_zmisc.cpp 13: Parameter 'argc' is never used in function main(int,char * *) Warning W8057 c:\BoostMainCVS\libs\serialization\test\test_zmisc.cpp 13: Parameter 'argvp' is never used in function main(int,char * *) Error E2312 C:\BoostMainCVS\boost/test/predicate_result.hpp 60: 'base' is not an unambiguous base class of 'predicate_result::readonly_property60' in function predicate_result::readonly_property60::readonly_property60(bool) *** 1 errors in Compile *** It would seem to me that the test library needs a borland specific tweak to address this. Robert Ramey