__attribute__ ((cleanup)), or how I came to love C again

If your project is written in C, and you don’t mind having a hard dependency on GCC (i.e. you don’t care about building with MSVC++), this GNU C extension does amazing things for your code.

There are other GNU C extensions that are simultaneously useless and crazy, but __attribute__ ((cleanup)) makes up for everything else. For reference, here’s a discussion about using it in GNOME.