Add OmpSs-2 test with tasks

overlay.nix

@@ -327,6 +327,9 @@ let
       compilers.clangOmpss2.lto = compilers.lto.override {
         stdenv = bsc.stdenvClangOmpss2;
       };
+      compilers.clangOmpss2.task = callPackage ./test/compilers/ompss2.nix {
+        stdenv = bsc.stdenvClangOmpss2;
+      };
     };
 
     testAll = with bsc.test; [
@@ -336,6 +339,7 @@ let
       compilers.intel2023.icc.cpp
       compilers.intel2023.ifort
       compilers.clangOmpss2.lto
+      compilers.clangOmpss2.task
     ];
 
     ci = import ./test/ci.nix {

test/compilers/ompss2.nix

@@ -0,0 +1,43 @@
+{ stdenv, writeText, which, strace }:
+
+let
+  task_c = writeText "task.c" ''
+    #include <stdio.h>
+
+    int main()
+    {
+        for (int i = 0; i < 10; i++) {
+            #pragma oss task
+            printf("Hello world!\n");
+        }
+
+        return 0;
+    }
+  '';
+in
+
+stdenv.mkDerivation rec {
+  version = "0.0.1";
+  name = "task_c";
+  src = task_c;
+  dontUnpack = true;
+  dontConfigure = true;
+  hardeningDisable = [ "all" ];
+  NIX_DEBUG = 1;
+  buildPhase = ''
+    set -x
+    echo CC=$CC
+    $CC -v
+
+    cp ${task_c} task.c
+    cat task.c
+    $CC -v -fompss-2 task.c -o task
+    ./task
+
+    set +x
+  '';
+
+  installPhase = ''
+    touch $out
+  '';
+}