I know the standard recommendation of K&R for people who want to learn C. But what would people's recommendations be to learn *just enough* C to be comfortable using C libraries from within Julia? For example, the manual states:
"The code to be called must be available as a shared library. Most C and Fortran libraries ship compiled as shared libraries already... " Having done almost nothing in C, this statement doesn't help me a whole lot, since I don't know what a shared library is. For instance, I've come across a few .h files as open-source projects, but I think the above statement is referring to .so files? So any recommendations how can I get enough knowledge about C to use ccall if I desire, without taking a ton of time away from Julia? I also know Python and R as a frame of reference.
