Move test inside pkgs/

pkgs/test/compilers/hello-cpp.nix

@@ -0,0 +1,36 @@
+{ stdenv, writeText, which, strace }:
+
+let
+  hello_cpp = writeText "hello.cpp" ''
+    #include <cstdio>
+
+    int main()
+    {
+            printf("Hello world!\n");
+            return 0;
+    }
+  '';
+in
+
+stdenv.mkDerivation rec {
+  version = "0.0.1";
+  name = "hello-cpp";
+  buildInputs = [ stdenv which strace ];
+  src = hello_cpp;
+  dontUnpack = true;
+  dontConfigure = true;
+  NIX_DEBUG = 0;
+  buildPhase = ''
+    cp $src hello.cpp
+    set -x
+    echo CXX=$CXX
+    which $CXX
+    $CXX hello.cpp -o hello
+    ./hello
+    set +x
+  '';
+
+  installPhase = ''
+    touch $out
+  '';
+}