Before I go digging into this. Does anybode have a clou where to look. This is what the cmake run reports. I guess that the --toolset=clang needs to be added somewhere. --WjW -- BUILDING Boost Libraries at j 8 Building Boost.Build engine with toolset ... tools/build/src/engine/### ### No toolset specified. Please use --toolset option. ### ### Known toolsets are: acc, borland, cc, como, clang, darwin, gcc, gcc-nocygwin, intel-darwin, intel-linux, intel-win32, kcc, k ylix, metrowerks, mipspro, msvc, qcc, pathscale, pgi, sun, sunpro, tru64cxx, vacpp, xlcpp, vc7, vc8, vc9, vc10, vc11, vc12, vc14 , vc15, vmsdecc ###/b2 cp: ./tools/build/src/engine/### ### No toolset specified. Please use --toolset option. ### ### Known toolsets are: acc, borland, cc, como, clang, darwin, gcc, gcc-nocygwin, intel-darwin, intel-linux, intel-win32, kcc, k ylix, metrowerks, mipspro, msvc, qcc, pathscale, pgi, sun, sunpro, tru64cxx, vacpp, xlcpp, vc7, vc8, vc9, vc10, vc11, vc12, vc14 , vc15, vmsdecc ###/b2: File name too long cp: ./tools/build/src/engine/### ### No toolset specified. Please use --toolset option. ### ### Known toolsets are: acc, borland, cc, como, clang, darwin, gcc, gcc-nocygwin, intel-darwin, intel-linux, intel-win32, kcc, k ylix, metrowerks, mipspro, msvc, qcc, pathscale, pgi, sun, sunpro, tru64cxx, vacpp, xlcpp, vc7, vc8, vc9, vc10, vc11, vc12, vc14 , vc15, vmsdecc ###/bjam: File name too long -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html