Using develop from this morning (tried various combinations of these three options...): boost@d48d3305d4b4:/boost/status$ ../b2 toolset=clang variant=release cxxstd=03 ... /boost/tools/build/src/build/feature.jam:491: in validate-value-string from module feature error: "shared:" is not a known value of feature <link> error: legal values: "shared" "static" /boost/tools/build/src/build/feature.jam:365: in expand-subfeatures-aux from module feature /boost/tools/build/src/build/feature.jam:422: in expand-subfeatures from module feature /boost/tools/build/src/build/feature.jam:871: in feature.expand from module feature /boost/tools/build/src/build/targets.jam:1103: in evaluate-requirements from module targets /boost/tools/build/src/build/targets.jam:1121: in common-properties2 from module targets /boost/tools/build/src/build/targets.jam:1017: in targets.common-properties from module targets /boost/tools/build/src/build/targets.jam:1313: in class@basic-target.generate from module object(typed-target)@47912 /boost/tools/build/src/build/targets.jam:812: in generate-really from module object(main-target)@70272 /boost/tools/build/src/build/targets.jam:784: in class@main-target.generate from module object(main-target)@70272 /boost/tools/build/src/build/targets.jam:273: in class@project-target.generate from module object(project-target)@47307 /boost/tools/build/src/build/targets.jam:273: in class@project-target.generate from module object(project-target)@4568 /boost/tools/build/src/build-system.jam:797: in load from module build-system /boost/tools/build/src/kernel/modules.jam:295: in import from module modules /boost/tools/build/src/kernel/bootstrap.jam:139: in boost-build from module /boost/boost-build.jam:17: in module scope from module