Obfuscating C-based binaries to avoid decompilation

Question

Is there some way to obfuscate C-based executables or libraries to prevent decompilation?

Answer 1

To make it harder? Sure. Please don't do that.

To prevent it? No. Any system that's going to run your binary will need the software to decrypt whatever scheme you come up with. And they'll be able to decompile that and then see how your obscured binaries get interpreted.