See

Inline NIF support for C

Simply use See in your module

defmodule Math do
  use See

  ~C"""
  int add(int a, int b) {
      return a + b;
  }

  double scale(double x, double factor) {
      return x * factor;
  }
  """
end

iex> Math.add(1, 2)
3
iex> Math.scale(3.0, 2.5)
7.5

Motivation

I wanted to have something like Rustler or Zigler but for C.

Disclaimer

This is NOT production-ready, it's simply a fun side-project.