Slightly related tangent:

I'm looking for standards / set of libraries / best practices for "modern" C development, but I've yet to find a comprehensive resource.

Stuff like typedefing a manual fixed sized int type to be cross-platform compatible, that books don't really tell you to do but are important and come up often.

I'd be okay with a small, well written example library too. Does anyone happen to know something like this?

edit: Ah, sorry if I misled you, that was just an example of the kind of tips and pointers I was looking for. Or weird bits like the linux kernel list_head. http://kernelnewbies.org/FAQ/LinkedLists Or common libraries like bstring that make life easy. Or even a single, comprehensive implementation of good data structures, since everyone seems to have their own vector.h and/or hash.h that fails to cover much other than their own use case.

The fixed-size int finally got a permanent solution: #include

If you are targeting autoconf/automake as your build system, that has a lot of built-in solutions to portability issues, like defining macros. It's not easy to learn, and I don't pretend to know it well, but when I'm compiling someone else's project, I'm always happy to see a configure script.

The gtk project's libglib is a pretty comprehensive library of C data structures. The Apache Portable Runtime serves a similar purpose: http://en.wikipedia.org/wiki/Apache_Portable_Runtime

What I find annoying about libraries like glib is that they tend to impose their own style on your project by using their own typedef'ed types and such.

If you don't mind it, you can cobble together your own data structures from various open-source projects. Judy arrays are pretty fast, and you can use them in a variety of ways. Searching google for "c hash table" came up with a lot of excellent results, so try googling whatever data structure or algorithm you need, and chances are, you'll find something.