sundials: Add version 2.7.0 as sundials_2

pkgs/development/libraries/sundials/2.x.nix

@@ -0,0 +1,61 @@
+{ stdenv
+, cmake
+, fetchurl
+, python
+# GNU Octave needs KLU for ODE solvers
+, suitesparse
+, liblapack
+, gfortran
+, lapackSupport ? true }:
+
+let liblapackShared = liblapack.override {
+  shared = true;
+};
+
+in stdenv.mkDerivation rec {
+  pname = "sundials";
+  version = "2.7.0";
+
+  buildInputs = [ python ] ++ stdenv.lib.optionals (lapackSupport) [
+    gfortran
+    suitesparse
+  ];
+  nativeBuildInputs = [ cmake ];
+
+  src = fetchurl {
+    url = "https://computation.llnl.gov/projects/${pname}/download/${pname}-${version}.tar.gz";
+    sha256 = "01513g0j7nr3rh7hqjld6mw0mcx5j9z9y87bwjc16w2x2z3wm7yk";
+  };
+
+  patches = [
+    (fetchurl {
+      # https://github.com/LLNL/sundials/pull/19
+      url = "https://github.com/LLNL/sundials/commit/1350421eab6c5ab479de5eccf6af2dcad1eddf30.patch";
+      sha256 = "0g67lixp9m85fqpb9rzz1hl1z8ibdg0ldwq5z6flj5zl8a7cw52l";
+    })
+  ];
+
+  cmakeFlags = [
+    "-DEXAMPLES_INSTALL_PATH=${placeholder "out"}/share/examples"
+  ] ++ stdenv.lib.optionals (lapackSupport) [
+    "-DSUNDIALS_INDEX_TYPE=int32_t"
+    # GNU Octave needs KLU for ODE solvers
+    "-DKLU_ENABLE=ON"
+    "-DKLU_INCLUDE_DIR=${suitesparse}/include"
+    "-DKLU_LIBRARY_DIR=${suitesparse}/lib"
+    "-DLAPACK_ENABLE=ON"
+    "-DLAPACK_LIBRARIES=${liblapackShared}/lib/liblapack${stdenv.hostPlatform.extensions.sharedLibrary};${liblapackShared}/lib/libblas${stdenv.hostPlatform.extensions.sharedLibrary}"
+  ];
+
+  # flaky tests, and patch in https://github.com/LLNL/sundials/pull/21 doesn't apply cleanly for sundials_3
+  doCheck = false;
+  checkPhase = "make test";
+
+  meta = with stdenv.lib; {
+    description = "Suite of nonlinear differential/algebraic equation solvers";
+    homepage    = https://computation.llnl.gov/projects/sundials;
+    platforms   = platforms.all;
+    maintainers = with maintainers; [ flokli idontgetoutmuch ];
+    license     = licenses.bsd3;
+  };
+}

pkgs/top-level/all-packages.nix

@@ -14400,6 +14400,10 @@ in
 
   sundials = callPackage ../development/libraries/sundials { };
 
+  sundials_2 = callPackage ../development/libraries/sundials/2.x.nix {
+    python = python3;
+  };
+
   sutils = callPackage ../tools/misc/sutils { };
 
   svrcore = callPackage ../development/libraries/svrcore { };