openbgpd: 6.8p0 -> 9.0 (+ refactorings) (#509502)

{

  lib,

  stdenv,

  fetchFromGitHub,

  autoconf,

  automake,

  libtool,

  m4,

  bison,

  clangStdenv,

  fetchurl,

  libevent,

}:

# Use clang instead of gcc because that issues way less warnings.

# Besides, OpenBSD devs generally prefer clang over gcc, so it is more likely

# that the entire compilation is more tested using clang from an upstream POV.

clangStdenv.mkDerivation (finalAttrs: {

  pname = "openbgpd";

  version = "9.0";

let

  openbsd_version = "OPENBSD_6_8"; # This has to be equal to ${src}/OPENBSD_BRANCH

  openbsd = fetchFromGitHub {

    name = "portable";

    owner = "openbgpd-portable";

    repo = "openbgpd-openbsd";

    rev = openbsd_version;

    sha256 = "sha256-vCVK5k4g6aW2z2fg7Kv0uvkX7f34aRc8K2myb3jjl6w=";

  src = fetchurl {

    url = "https://cdn.openbsd.org/pub/OpenBSD/OpenBGPD/openbgpd-${finalAttrs.version}.tar.gz";

    hash = "sha256-4JfE81Gibx3lM5IS2eENTPWrxLgQXk8cSI7wZakD9hU=";

  };

in

stdenv.mkDerivation rec {

  pname = "opengpd";

  version = "6.8p0";

  src = fetchFromGitHub {

    owner = "openbgpd-portable";

    repo = "openbgpd-portable";

    rev = version;

    sha256 = "sha256-TKs6tt/SCWes6kYAGIrSShZgOLf7xKh26xG3Zk7wCCw=";

  };

  nativeBuildInputs = [

    autoconf

    automake

    libtool

    m4

    bison

  buildInputs = [

    libevent

  ];

  preConfigure = ''

    mkdir ./openbsd

    cp -r ${openbsd}/* ./openbsd/

    chmod -R +w ./openbsd

    openbsd_version=$(cat ./OPENBSD_BRANCH)

    if [ "$openbsd_version" != "${openbsd_version}" ]; then

      echo "OPENBSD VERSION does not match"

      exit 1

    fi

    ./autogen.sh

  '';

  # Workaround build failure on -fno-common toolchains like upstream

  # gcc-10. Otherwise build fails as:

  #   ld: bgpd-rde_peer.o:/build/source/src/bgpd/bgpd.h:133: multiple definition of `bgpd_process';

  #     bgpd-bgpd.o:/build/source/src/bgpd/bgpd.h:133: first defined here

  env.NIX_CFLAGS_COMPILE = "-fcommon";

  meta = {

    description = "Free implementation of the Border Gateway Protocol, Version 4. It allows ordinary machines to be used as routers exchanging routes with other systems speaking the BGP protocol";

    license = lib.licenses.isc;

    maintainers = with lib.maintainers; [ cvengler ];

    platforms = lib.platforms.linux;

  };

}

})