So, Clang/C2 can't link for some reason.
It occurred to me that the PP tests don't need to link. So,
...failed updating 25 targets... ...skipped 26 targets... ...updated 118 targets...
This is with C:\Projects\boost-git\boost\libs\preprocessor>git diff diff --git a/include/boost/preprocessor/config/config.hpp b/include/boost/prepro index 4801903..10778d8 100644 --- a/include/boost/preprocessor/config/config.hpp +++ b/include/boost/preprocessor/config/config.hpp @@ -79,7 +79,7 @@ # elif defined _MSC_VER && _MSC_VER >= 1400 && (defined(__clang__) || !defin # define BOOST_PP_VARIADICS 1 # undef BOOST_PP_VARIADICS_MSVC -# define BOOST_PP_VARIADICS_MSVC 1 +# define BOOST_PP_VARIADICS_MSVC 0 # /* Wave (C/C++), GCC (C++) */ # elif defined __WAVE__ && __WAVE_HAS_VARIADICS__ || defined __GNUC__ && def # define BOOST_PP_VARIADICS 1 @@ -94,7 +94,7 @@ # define BOOST_PP_VARIADICS 1 # if defined _MSC_VER && _MSC_VER >= 1400 && (defined(__clang__) || defined( # undef BOOST_PP_VARIADICS_MSVC -# define BOOST_PP_VARIADICS_MSVC 1 +# define BOOST_PP_VARIADICS_MSVC 0 # endif # else # undef BOOST_PP_VARIADICS