Small fix for \tools\build\v2\tools\stlport.jam : line 220 if [ $(rproperties).get <runtime-debugging> ] = "on" { usage-requirements += <define>_STLP_DEBUG=1 <define>_STLP_DEBUG_UNINITIALIZED=1 ; } -- if [ $(rproperties).get <runtime-debugging> ] = "on" ++ if [ $(rproperties).get <runtime-link> ] = "shared" { usage-requirements += <define>_STLP_USE_DYNAMIC_LIB=1 ; } The _STLP_USE_DYNAMIC_LIB should not depend on runtime-debugging setting. A guess, after peeking at builtin.jam etc, is that the --marked line should be replaced with the ++ marked line. re