ntl: 9.11.0 -> 11.2.1

ntl hasn't been updated in a while. So I'm doing that and adding myself
as the maintainer. I'm also adding some options and pinning the sage
dependency, since it is unfortunately not compatible with the latest ntl
yet.

I've also enabled the tests, since they don't take terribly long and are
worth the time in my opinion.

pkgs/development/libraries/ntl/default.nix

@@ -1,27 +1,60 @@
-{ stdenv, fetchurl, perl, gmp, libtool
+{ stdenv
+, lib
+, fetchurl
+, perl
+, gmp
+, gf2x ? null
+# I asked the ntl maintainer weather or not to include gf2x by default:
+# > If I remember correctly, gf2x is now thread safe, so there's no reason not to use it.
+, withGf2x ? true
+, tune ? false # tune for current system; non reproducible and time consuming
 }:
 
+assert withGf2x -> gf2x != null;
+
 stdenv.mkDerivation rec {
   name = "ntl-${version}";
-  version = "9.11.0";
+  version = "11.2.1";
   src = fetchurl {
     url = "http://www.shoup.net/ntl/ntl-${version}.tar.gz";
-    sha256 = "1wcwxpcby1c50llncz131334qq26lzh3dz21rahymgvakrq0369p";
+    sha256 = "04avzmqflx2a33n7v9jj32g83p7m6z712fg1mw308jk5ca2qp489";
   };
 
-  buildInputs = [ perl gmp libtool ];
+  buildInputs = [
+    gmp
+  ];
+
+  nativeBuildInputs = [
+    perl # needed for ./configure
+  ];
 
   sourceRoot = "${name}/src";
 
   enableParallelBuilding = true;
 
-  dontAddPrefix = true;
+  dontAddPrefix = true; # DEF_PREFIX instead
 
-  configureFlags = [ "DEF_PREFIX=$(out)" "WIZARD=off" "SHARED=on" "NATIVE=off" "CXX=c++" ];
+  # reference: http://shoup.net/ntl/doc/tour-unix.html
+  configureFlags = [
+    "DEF_PREFIX=$(out)"
+    "SHARED=on" # genereate a shared library (as well as static)
+    "NATIVE=off" # don't target code to current hardware (reproducibility, portability)
+    "TUNE=${
+      if tune then
+        "auto"
+      else if stdenv.targetPlatform.isx86 then
+        "x86" # "chooses options that should be well suited for most x86 platforms"
+      else
+        "generic" # "chooses options that should be OK for most platforms"
+    }"
+  ] ++ lib.optionals withGf2x [
+    "NTL_GF2X_LIB=on"
+    "GF2X_PREFIX=${gf2x}"
+  ];
 
-  # doCheck = true; # takes some time
+  doCheck = true; # takes some time
 
-  meta = {
+  meta = with lib; {
     description = "A Library for doing Number Theory";
     longDescription = ''
       NTL is a high-performance, portable C++ library providing data
@@ -30,7 +63,8 @@ stdenv.mkDerivation rec {
       the integers and over finite fields.
     '';
     homepage = http://www.shoup.net/ntl/;
-    license = stdenv.lib.licenses.gpl2Plus;
-    platforms = stdenv.lib.platforms.all;
+    maintainers = with maintainers; [ timokau ];
+    license = licenses.gpl2Plus;
+    platforms = platforms.all;
   };
 }