Revision history [back]

It seem like Andrew Zelenak broke his own package with commit 2cc82dd .

I don't actually use the pid package, but looked through the code and thought it was strange that boost::any was not included as a header. I seems he (unintentionally) removed it. I suggest that you file an issue in his bitbucket. Temporarily, you can also git checkout the latest tag, that is probably more stable (currently 0.0.27)