https://github.com/mcandre/tonixxx
tonixxx sits atop Vagrant, providing a standard base for cross-platform builds. The included demos are preconfigured to build an example C application against 13 different target kernels, including several flavors of Linux, BSD’s, Windows, Illumos, MINIX, and Haiku nightly.
I had this silly dream of one build bot to churn out dozens of software ports at once, so here’s tonixxx~ Build bot provisioning sold separately, hehe.