the function provides a cross-platform way to determine the exact pathname of our build tools (moc, etc.). use it in our .prf files, so we don't have to rely on qmake's unreliable path separator normalization magic in extra compiler commands, which broke on mingw+sh in silent mode. remove the bootstrap tool path setting from configure, as it is redundant now. Reviewed-by: joerg Task-number: QTBUG-10633