I recently ran into a nasty problem, arguably a bug, in GCC. I decided to write a little tool to help me detect when I'm triggering this bug. This post is about how I did that, using some simple but handy helper scripts I've been growing for a while. The bug is to do with “constructor” functions in GNU C (not to be confused with C++ constructors!). I'll quote from my bug report, slightly edited. I was surprised to find that my __attribute__((constructor(101))) on a function was not giving...
