whois: 5.5.19 -> 5.5.20

--- a/utils.h

+++ b/utils.h

@@ -15,7 +15,7 @@

 #endif

 /* Portability macros */

-#ifdef __GNUC__

+#if defined __GNUC__ && ! defined __clang__

 # define NORETURN __attribute__((noreturn))

 # define MALLOC_FREE __attribute__((malloc(free)))

 # define NONNULL __attribute__((returns_nonnull))

{ lib, stdenv, fetchFromGitHub, perl, gettext, pkg-config, libidn2, libiconv }:

stdenv.mkDerivation rec {

  version = "5.5.19";

  version = "5.5.20";

  pname = "whois";

  src = fetchFromGitHub {

    owner = "rfc1036";

    repo = "whois";

    rev = "v${version}";

    hash = "sha256-4mFn5cY7ipAU4vOiHC2s69fxYJwShQEQ1eA8t5JvOP0=";

    hash = "sha256-0vQ6GBBtNA6Phlqhl3NZvEJqoyZ1um7VdkpsIRKhsm4=";

  };

  patches = [

    ./clang.patch

  ];

  nativeBuildInputs = [ perl gettext pkg-config ];

  buildInputs = [ libidn2 libiconv ];