[pmiller2]

I don't know anything about this cache you're referring to, but, is it so pervasive within the library that you can't easily do a patch to remove it? Would such a patch be accepted by upstream? If you're opposed to using the environment variable, those would be my next thoughts if you wanted to get back the ability to use valgrind et al.

[ibotty]

You only need an environment variable. It is already implemented. They just did not try it.