> 4. scons is conservative and always errs on the side of a more complete
> build if it's not sure, so you may get some unnecessary rebuilds (the
> most obvious is that it relinks any dynamic library if any of its
> dependencies are rebuilt). I'm assuming this and the rebuild of SWIG
> modules are the "deep flaws" that Daniel alludes darkly to, since I'm
> not aware of any others.
Yes. And unfortunately the swig modules are the biggest files in IMP...