How to generate a random number from whole range of int in C?

unsigned const number = minimum + (rand() % (maximum - minimum + 1))

I know how to (easily) generate a random number within a range such as from 0 to 100. But what about a random number from the full range of int (assume sizeof(int) == 4), that is from INT_MIN to INT_MAX, both inclusive?

I don't need this for cryptography or the like, but a approximately uniform distribution would be nice, and I need a lot of those numbers.

The approach I'm currently using is to generate 4 random numbers in the range from 0 to 255 (inclusive) and do some messy casting and bit manipulations. I wonder whether there's a better way.