Use clang instead of the stdenv and add test

isabel/slurm/flake.nix

@@ -25,10 +25,12 @@
     devShells.x86_64-linux.default = pkgs.mkShell {
       pname = "devshell";
       buildInputs = with pkgs; [
-        stdenvClangOmpss2
+        slurm.out slurm.dev gcc
+        clangOmpss2
+        nanos6
       ];
       inputsFrom = with pkgs; [
-        slurm nanos6
+        nanos6
       ];
     };
   };

isabel/slurm/llvmTest.c

@@ -0,0 +1,12 @@
+#include <stdio.h>
+
+int main()
+{
+	#pragma oss task node(0)
+    {
+        printf("Tasking\n");
+    }
+    #pragma oss taskwait
+    printf("Past the task\n");
+    return 0;
+}