Mix Compile C

Create a 'c' code compilation tasks for Elixir. Mostly based on Basho's rebar tool.

Preview Version

This is preview level code and not released to hex yet. To try it check out the library to a path somewhere and use the :path attribute when adding the dep.

There are multiple things wrong with current iteration. What I am foucusing now is if it compiles correctly and if the configuration specs will need change. Please take part in discussing these in the issues.

After that I will remove the noise and add things like skipping compilation when it's not needed and so on.

Usage

First, add the project to your mix.exs dependencies:

def deps do
  [{:mix_compile_c, "~> 0.0.1", path: "/Users/USER/Code/MixCompileC"}]
end

Then add :c to your list of compilers and set up your c_src.

def project do
  [
    app: :my_project,
    version: "0.0.1",
    elixir: "~> 1.0",
    deps: deps,
    compilers: Mix.compilers ++ [:c],
    c_src: c_src
  ]
end

defp c_src do
  [
    specs: [
      {"priv/project_port.so", ["c_src/*.c"]}
    ],
    env: []
  ]
end

c_src.specs

Specs define c projects to compile.

specs: [
  {"priv/project_port.so", ["c_src/*.c"]}
  {~r/win32/, "priv/project_port.so", ["c_src/windows/*.c"]}
],

The file extension will define the compilation steps taken. ".so" or ".dll" will be compiled as linked in drivers. "" or ".exe" will be compiled as ports.

c_src.env

Make changes to compile variables.

env: [
  {~r/darwin/, "CFLAGS", "$CFLAGS -Wall"}
]

A list of current attributes can be found at: https://github.com/JonGretar/MixCompileC/blob/master/lib/mix.compilers.ex#L100