[samsquire]

One thing you can do is implement a JIT compiler.

Here's Martin Jacob's code to execute arbitrary memory. If you malloc a byte array and insert opcodes directly at indexes, you can construct machine code and execute it.

https://gist.github.com/martinjacobd/3ee56f3c7b7ce621034ec3e...

Since your C program is already in memory, you have access to the C standard library and don't have to worry about linking or object formats but you'll have to worry about parameter passing and FFI.

My toy JIT compiler based on this idea is here https://github.com/samsquire/compiler but it is incomplete.