Testing experiments with nbody

bsc/garlic/nbody/default.nix

@@ -0,0 +1,44 @@
+{
+  stdenv
+, cc
+, cflags ? null
+, gitBranch
+, blocksize ? "2048"
+, particles ? "16384"
+, timesteps ? "10"
+}:
+
+stdenv.mkDerivation {
+  name = "nbody";
+
+  src = builtins.fetchGit {
+    url = "ssh://git@bscpm02.bsc.es/rarias/nbody.git";
+    ref = gitBranch;
+  };
+
+  buildInputs = [
+    cc
+  ];
+
+  preBuild = (if cflags != null then ''
+    makeFlagsArray+=(CFLAGS=${cflags})
+  '' else "");
+
+  makeFlags = [
+    "CC=${cc.cc.CC}"
+    "BS=${blocksize}"
+  ];
+
+  installPhase = ''
+    mkdir -p $out/bin
+    cp nbody $out/bin/
+
+    cat > $out/bin/run <<EOF
+    #!/bin/bash
+    exec $out/bin/nbody -p ${particles} -t ${timesteps}
+    EOF
+
+    chmod +x $out/bin/run
+  '';
+
+}