Hello all, Another question on the regression tests. How am I supposed to differentiate GCC 6.0 between CrystaX-apilevel-19-armeabi-v7a-gnu-libstdc++ and CrystaX-apilevel-19-armeabi-v7a-hard-llvm-libc++? http://www.boost.org/development/tests/develop/developer/contract.html They both use the same toolset name "gcc-gnu-6", but when libc++ is used instead of libstdc++ Boost.Contract tests give these linker errors: ../boost/smart_ptr/detail/sp_counted_impl.hpp:146: error: undefined reference to 'operator delete(void*, unsigned int)' /home/cislave/.crystax/ci-boost/regression/android-19-armeabi-v7a-hard-llvm-develop/tmp/crystax-ndk-10.3.2/sources/cxx-stl/llvm-libc++/3.6/libcxx/include/sstream:189: error: undefined reference to 'operator delete(void*, unsigned int)' ../boost/iostreams/detail/streambuf/indirect_streambuf.hpp:50: error: undefined reference to 'operator delete(void*, unsigned int)' /home/cislave/.crystax/ci-boost/regression/android-19-armeabi-v7a-hard-llvm-develop/tmp/crystax-ndk-10.3.2/sources/cxx-stl/llvm-libc++/3.6/libcxx/include/sstream:740: error: undefined reference to 'operator delete(void*, unsigned int)' collect2: error: ld returned 1 exit status I wanted to mark the link errors for libc++ as expected failures while leaving libstdc++ unmarked (because there are no link errors for libstdc++). However, I don't know how to do that because the toolset name is the same "gcc-gnu-6" for both runs with libstdc++ (column 6) and with libc++ (column 10). Should the toolset names be unique instead? For example, should names like gcc-gnu-6~libstdc++ and gcc-gnu-6~libc++ have been used in this case instead of using just gcc-gnu-6 for both runs? Thank you. --Lorenzo