This simple piece of code doesn't compile for me in boost 1.54 on MacOSX: #include <boost/preprocessor.hpp> #define debugprintf(...) \ printf(BOOST_PP_SEQ_ELEM(0, BOOST_PP_VARIADIC_TO_SEQ(__VA_ARGS__))) main () { debugprintf("test"); } I've spent ages on it without success. Any suggestions would be greatly appreciated! Compile output: error: too few arguments provided to function-like macro invocation debugprintf("boost test"); ^ main.cpp:15:17: note: expanded from macro 'debugprintf' fprintf(stderr, BOOST_PP_SEQ_ELEM(0, BOOST_PP_VARIADIC_TO_SEQ(__VA_ARGS__))); \ ^ /usr/local/Boost/1.54/include/boost/preprocessor/seq/elem.hpp:22:39: note: expanded from macro 'BOOST_PP_SEQ_ELEM' # define BOOST_PP_SEQ_ELEM(i, seq) BOOST_PP_SEQ_ELEM_I(i, seq) ^ /usr/local/Boost/1.54/include/boost/preprocessor/seq/elem.hpp:41:45: note: expanded from macro 'BOOST_PP_SEQ_ELEM_I' # define BOOST_PP_SEQ_ELEM_I(i, seq) BOOST_PP_SEQ_ELEM_II(BOOST_PP_SEQ_ELEM_ ## i seq) ^ /usr/local/Boost/1.54/include/boost/preprocessor/seq/elem.hpp:43:62: note: expanded from macro 'BOOST_PP_SEQ_ELEM_II' # define BOOST_PP_SEQ_ELEM_II(im) BOOST_PP_SEQ_ELEM_III(im) ^ main.cpp:21:2: error: use of undeclared identifier 'BOOST_PP_SEQ_ELEM_III' debugprintf("boost test"); -- View this message in context: http://boost.2283326.n4.nabble.com/Boost-preprocess-VAR-ARGS-compile-fail-tp... Sent from the Boost - Users mailing list archive at Nabble.com.