h.b.furuseth@usit.uio.no wrote:

If we require C99 library features like this, then I think we should add a configure test for them. Strange breakage at runtime is rather worse than a failed build.

(That's not the same as testing for a C99 compiler, since one can have a C99 compiler like gcc with a C90 library.)

The fewer configure tests we need, the better. Happy to replace %zu with %llu and forget about it. It's not worth a fuss.