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Multi-Platform build system for Elixir

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bundlex lib bundlex toolchain gcc.ex
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lib/bundlex/toolchain/gcc.ex 

defmodule Bundlex.Toolchain.GCC do

  @moduledoc """

  Toolchain definition for GCC.

  """



  use Bundlex.Toolchain



  def compiler_commands(nif, app_name, nif_name) do

    # FIXME escape quotes properly



    includes_part =

      nif.includes |> Enum.map(fn include -> "-I\"#{include}\"" end) |> Enum.join(" ")



    libs_part = nif.libs |> Enum.map(fn lib -> "-l#{lib}" end) |> Enum.join(" ")



    pkg_config_libs_part =

      nif.pkg_configs

      |> Enum.map(fn pkg_config ->

        %Porcelain.Result{status: 0, out: out} =

          Porcelain.exec("pkg-config", ["--libs", pkg_config])



        out |> String.trim()

      end)

      |> Enum.join(" ")



    pkg_config_cflags_part =

      nif.pkg_configs

      |> Enum.map(fn pkg_config ->

        %Porcelain.Result{status: 0, out: out} =

          Porcelain.exec("pkg-config", ["--cflags", pkg_config])



        out |> String.trim()

      end)

      |> Enum.join(" ")



    objects = nif.sources |> Enum.map(fn source -> object_path(source) end) |> Enum.join(" ")



    commands_sources =

      nif.sources

      |> Enum.map(fn source ->

        "gcc -fPIC -std=c11 -Wall -Wextra -O2 -g #{includes_part} #{libs_part} #{

          pkg_config_cflags_part

        } \"#{source_path(source)}\" -c -o \"#{object_path(source)}\""

      end)



    commands_linker = [

      "gcc -rdynamic -undefined -shared #{objects} #{libs_part} #{pkg_config_libs_part} -o #{

        Toolchain.output_path(app_name, nif_name)

      }.so"

    ]



    ["mkdir -p #{Toolchain.output_path(app_name)}"] ++ commands_sources ++ commands_linker

  end



  defp source_path(source), do: source



  defp object_path(source), do: "#{source}.o" |> String.replace(~r(\.c\.o$), ".o")

end