warning: mismatched versions of Boost.Build engine and core warning: Boost.Build engine (bjam) is 2011.12.01 warning: Boost.Build core (at /usr/include/boost_1_61_0/tools/build/src) is 2015.07-git Performing configuration checks - 32-bit : no - 64-bit : yes - arm : no - mips1 : no - power : no - sparc : no - x86 : yes - symlinks supported : yes /usr/include/boost_1_61_0/tools/build/src/tools/link.jam:398: in link-recursively ERROR: rule "READLINK" unknown in module "link". /usr/include/boost_1_61_0/tools/build/src/tools/link.jam:472: in link.do-link-recursively /usr/include/boost_1_61_0/tools/build/src/kernel/modules.jam:107: in modules.call-in /usr/include/boost_1_61_0/tools/build/src/util/indirect.jam:98: in indirect.call /usr/include/boost_1_61_0/tools/build/src/build/virtual-target.jam:798: in class@action.actualize /usr/include/boost_1_61_0/tools/build/src/build/virtual-target.jam:311: in actualize-action /usr/include/boost_1_61_0/tools/build/src/build/virtual-target.jam:497: in actualize-no-scanner /usr/include/boost_1_61_0/tools/build/src/build/virtual-target.jam:134: in class@virtual-target.actualize /usr/include/boost_1_61_0/tools/build/src/build/virtual-target.jam:855: in actualize-sources /usr/include/boost_1_61_0/tools/build/src/build/virtual-target.jam:780: in class@action.actualize /usr/include/boost_1_61_0/tools/build/src/build/virtual-target.jam:311: in actualize-action /usr/include/boost_1_61_0/tools/build/src/build/virtual-target.jam:497: in actualize-no-scanner /usr/include/boost_1_61_0/tools/build/src/build/virtual-target.jam:134: in class@virtual-target.actualize /usr/include/boost_1_61_0/tools/build/src/build/virtual-target.jam:819: in actualize-source-type /usr/include/boost_1_61_0/tools/build/src/build/virtual-target.jam:840: in actualize-sources /usr/include/boost_1_61_0/tools/build/src/build/virtual-target.jam:780: in class@action.actualize /usr/include/boost_1_61_0/tools/build/src/build/virtual-target.jam:311: in actualize-action /usr/include/boost_1_61_0/tools/build/src/build/virtual-target.jam:497: in actualize-no-scanner /usr/include/boost_1_61_0/tools/build/src/build/virtual-target.jam:134: in class@virtual-target.actualize /usr/include/boost_1_61_0/tools/build/src/build-system.jam:727: in load /usr/include/boost_1_61_0/libs/python/example/../../../tools/build/src/kernel/modules.jam:295: in import /usr/include/boost_1_61_0/libs/python/example/../../../tools/build/src/kernel/bootstrap.jam:139: in boost-build /usr/include/boost_1_61_0/libs/python/example/boost-build.jam:7: in module scope