default.nix

{
stdenv
, pkgs
, linuxHeaders ? null
}:
let
  self = stdenv.mkDerivation rec {
    pname = "musl-unpatched";
    version = "1.2.5";

    src = fetchGit {
      url = "git://git.musl-libc.org/musl";
      rev = "0784374d561435f7c787a555aeab8ede699ed298";
    };

    enableParallelBuilding = true;

    configurePhase = ''
      echo "Configuring with musl's configure script"
      echo "Target platform is ${stdenv.targetPlatform.config}"
      ./configure --prefix=$out --with-malloc=oldmalloc --disable-shared --enable-debug CROSS_COMPILE=${stdenv.targetPlatform.config}-
    '';

    # Copy linux headers - taken from upstream nixpkgs musl, needed for libcxx to build
    postInstall = ''
      (cd $out/include && ln -s $(ls -d ${linuxHeaders}/include/* | grep -v "scsi$") .)
    '';

    CFLAGS = "-Wno-error=int-conversion -nostdinc";

    passthru.linuxHeaders = linuxHeaders;

    meta = {
      description = "musl - Linux based libc (unpatched)";
      homepage = "https://www.musl-libc.org/";
      license = pkgs.lib.licenses.mit;
    };
  };

  dev = pkgs.lib.getDev self;
  lib = pkgs.lib.getLib self;
in
  self.overrideAttrs (oldAttrs: {
  })