Ada

Ada / Gnat Support

The GNAT Ada toolchain is fully packaged in NixOS and can be used to build software. It has a bit less convenience than typical C/C++ toolchains due to its small user base. A simple Ada program using GPR can be built as follows:

{ stdenv, gnat, gprbuild, glibc }:

stdenv.mkDerivation {
  pname = "an-ada-program";
  version = "1.2.3";

  src = ...;

  nativeBuildInputs = [
    gprbuild
    gnat
  ];

  dontConfigure = true;

  buildPhase = ''
    runHook preBuild

    gprbuild

    runHook postBuild
  '';

  installPhase = ''
    runHook preInstall

    mkdir -p $out/bin

    # Only install what we need to run the binary.
    gprinstall --prefix=$out hello.gpr \
      --no-project \
      --no-manifest \
      --mode=usage

    runHook postInstall
  '';
}

Building Static Binaries

If you try to build static binaries, you need to add the static version of libc manually. For this add

glibc

to the derivation parameters (at the top) and add the following to the derivation itself.

  buildInputs = [
    glibc.static
  ];

There is an example on Github.