When you need a configuration step, cmake will actually save you a lot of time, especially if you work cross platform or even cross compile. I love to hate cmake as much as the next guy, and it would be hard to design a worse scripting language, but I'll take it any time over autoconf. Some of the newer tools may well be more convenient - I tried Bazel, and it sure wasn't (for me).

If you're happy to bake one config in a makefile, then cmake will do very little for you.