Julia language: update to a fresh version

Update julia and some of its dependencies

Split PCRE because a lot of packages depend on it and I am not sure we
want to test them in a hurry (and Julia specifies exact version).

pkgs/development/libraries/science/math/liblapack/default.nix

@@ -4,10 +4,10 @@ let
   usedLibExtension = if shared then ".so" else ".a";
 in
 stdenv.mkDerivation {
-  name = "liblapack-3.4.0";
+  name = "liblapack-3.4.1";
   src = fetchurl {
-    url = "http://www.netlib.org/lapack/lapack-3.4.0.tgz";
-    sha256 = "1sf30v1ps5icg67dvw5sbx5yhypx13am470gqg2f7l04f3wrw4x7";
+    url = "http://www.netlib.org/lapack/lapack-3.4.1.tgz";
+    sha256 = "93b910f94f6091a2e71b59809c4db4a14655db527cfc5821ade2e8c8ab75380f";
   };
 
   propagatedBuildInputs = [ atlasMaybeShared ];

pkgs/development/libraries/science/math/openblas/default.nix

@@ -0,0 +1,36 @@
+{ stdenv, fetchurl, gfortran, perl }:
+
+stdenv.mkDerivation rec {
+  version = "0.2.2";
+  lapack_version = "3.4.1";
+  lapack_src = fetchurl {
+    url = "http://www.netlib.org/lapack/lapack-${lapack_version}.tgz";
+    sha256 = "93b910f94f6091a2e71b59809c4db4a14655db527cfc5821ade2e8c8ab75380f";
+  };
+
+  name = "openblas-${version}";
+  src = fetchurl {
+    url = "https://github.com/xianyi/OpenBLAS/tarball/v${version}";
+    sha256 = "13kdx3knff5ajnmgn419g0dnh83plin07p7akwamr3v7z5qfrzqr";
+    name = "openblas-${version}.tar.gz";
+  };
+
+  preBuild = "cp ${lapack_src} lapack-${lapack_version}.tgz";
+
+  buildInputs = [gfortran perl];
+
+  cpu = builtins.head (stdenv.lib.splitString "-" stdenv.system);
+
+  target = if cpu == "i686" then "P6" else 
+    if cpu == "x86_64" then "CORE2" else
+     # allow autodetect
+      "";
+
+  makeFlags = "${if target != "" then "TARGET=" else ""}${target} FC=gfortran CC=cc PREFIX=\"\$(out)\"";
+
+  meta = {
+    description = "Basic Linear Algebra Subprograms";
+    license = stdenv.lib.licenses.bsd3;
+    homepage = "https://github.com/xianyi/OpenBLAS";
+  };
+}