I am trying to use the Clang compiler to build a Boost.Test library and have now found the necessary user-config.jam to select the compiler (thanks Jurgen Hunold) , but the link stage tools are not being found. Can anyone suggest what bjam incantation is needed ? Thanks Paul clang-linux.archive i:\boost-trunk\boost\bin.v2\libs\test\build\clang-linux-3.1\debug\link-static\runtime-link-static\th reading-multi\libboost_prg_exec_monitor-clang31-mt-sd-1_53.lib '"ar"' is not recognized as an internal or external command, operable program or batch file. '"ranlib"' is not recognized as an internal or external command, operable program or batch file. "ar" rc "i:\boost-trunk\boost\bin.v2\libs\test\build\clang-linux-3.1\debug\link-static\runtime-link-static\t hreading-multi\libboost_prg_exec_monitor-clang31-mt-sd-1_53.lib" "i:\boost-trunk\boost\bin.v2\libs\test\build\clang-linux-3.1\debug\link-static\runtime-link-static\t hreading-multi\execution_monitor.obj" "i:\boost-trunk\boost\bin.v2\libs\test\build\clang-linux-3.1\debug\link-static\runtime-link-static\t hreading-multi\debug.obj" "i:\boost-trunk\boost\bin.v2\libs\test\build\clang-linux-3.1\debug\link-static\runtime-link-static\t hreading-multi\cpp_main.obj" "ranlib" "i:\boost-trunk\boost\bin.v2\libs\test\build\clang-linux-3.1\debug\link-static\runtime-link-static\t hreading-multi\libboost_prg_exec_monitor-clang31-mt-sd-1_53.lib" ...failed clang-linux.archive i:\boost-trunk\boost\bin.v2\libs\test\build\clang-linux-3.1\debug\link-static\runtime-link-static\th reading-multi\libboost_prg_exec_monitor-clang31-mt-sd-1_53.lib... My user-config.jam contains using clang : #version 3.1 : # compiler "C:/mingw32-dw2/bin/clang++.exe" #"C:/mingw32-dw2/bin/ar.exe" <<<< actual locations of tools #"C:/mingw32-dw2/bin/ranlib.exe" <<<< actual locations of tools : # options <cxxflags>-v # verbose for testing. <cxxflags>-IC:/mingw32-dw2/include/c++/4.6.3 # for stdlib? #e:/dev/apps/mingw64/include/c++/4.7.2 <cxxflags>-IC:/mingw32-dw2/i686-w64-mingw32/include #e:/dev/apps/mingw64/include/c++/4.7.2/x86_64-w64-mingw32 # <cxxflags>-std="c++11" <root>"C:/mingw32-dw2/bin" # attempt to find the link tools ; --- Paul A. Bristow, Prizet Farmhouse, Kendal LA8 8AB UK +44 1539 561830 07714330204 pbristow@hetp.u-net.com