I believe the issue is that 'info' and 'print_info' are not recognized as valid config options for Inline::CPP. When I remove that specific option, the compilation occurs as it should. This is probably a bug.

Any option not handled directly by Inline::CPP's code is supposed to propagate back to Inline::C. However, it does appear the info option works correctly with Inline::C. I suggest reporting this as an issue in the module's repo and either I or someone else with some time who follows the repo may be able to dig into it at some point.

This is an annoying bug, given the fact that the Inline::CPP module DOES have an info handler that apparently isn't getting called. After some initial investigation I'm all the more interested. I'll try to take a look sometime this week.