The clang-win toolset is known to be broken. I don't know if it ever worked. I believe that clang-linux (using regular clang, not clang-cl) works for most platforms other than OSX. (Yes, I know, cleaning up this mess is on my todo list.)
Using: using clang : : "C:/Program Files/LLVM/bin/clang-cl.exe" : <compatibility>vc14.1 ; Results in: $ ../../../b2 config_info clang C:\cygwin64\home\John\user-config.jam:47: Unescaped special character in argument <cxxflags>-std:c++latest ..\..\..\libs\log\build\Jamfile.v2:45: Unescaped special character in argument <define>$(flag)=1 M:/data/boost/boost/tools/build/src/build\configure.jam:288: in try-find-build *** argument error * rule log-check-result ( result ) * called with: ( ) * missing argument result M:/data/boost/boost/tools/build/src/build\configure.jam:86:see definition of rule 'log-check-result' being called M:/data/boost/boost/tools/build/src/build\configure.jam:391: in find-builds-raw M:/data/boost/boost/tools/build/src/build\configure.jam:450: in configure.find-builds M:/data/boost/boost\boostcpp.jam:734: in boostcpp.deduce-address-model M:/data/boost/boost/tools/build/src/kernel\modules.jam:107: in modules.call-in M:/data/boost/boost/tools/build/src/util\indirect.jam:105: in indirect.call M:/data/boost/boost/tools/build/src/build\property.jam:144: in property.evaluate-conditionals-in-context M:/data/boost/boost/tools/build/src/build\targets.jam:1087: in evaluate-requirements M:/data/boost/boost/tools/build/src/build\targets.jam:1121: in common-properties2 M:/data/boost/boost/tools/build/src/build\targets.jam:1017: in targets.common-properties M:/data/boost/boost/tools/build/src/build\targets.jam:1313: in class@basic-target.generate M:/data/boost/boost/tools/build/src/build\targets.jam:812: in generate-really M:/data/boost/boost/tools/build/src/build\targets.jam:784: in class@main-target.generate M:/data/boost/boost/tools/build/src\build-system.jam:797: in load M:\data\boost\boost\tools\build\src/kernel\modules.jam:295: in import M:\data\boost\boost\tools\build\src/kernel/bootstrap.jam:139: in boost-build M:\data\boost\boost\boost-build.jam:17: in module scope Using: using clang : : "C:/Program Files/LLVM/bin/clang.exe" ; Does indeed seem to work OK, and as far as I can tell it's clang on top of msvc-14.1.
They're harmless for now, but will break at some unspecified time in the future, when I switch to the new lexer.
It would help a lot if the message said which characters were special and need escaping. Thanks, John. --- This email has been checked for viruses by AVG. http://www.avg.com