For a hack week project at Chartbeat, I hooked my Philip’s Hue light bulbs into PagerDuty so whenever I get paged my lights will start flashing. Read about the hack over on the PagerDuty blog

Tonight I took the plunge to get back into some more C coding. In getting my environment setup I came across a useful debugging macro. This macro will output the filename and line number every time it’s expanded. I wanted to make sure I understood how the macro was working before just copying and pasting it into my source code so I’ve broken it down below for myself and others to understand.