diff --git a/IDEAS b/IDEAS
index f9b2b02..adf1ca5 100644
--- a/IDEAS
+++ b/IDEAS
@@ -18,3 +18,6 @@ irgendwas mit unions
 sudoku solver
 clang -Wunreachable-code
 http://underhanded.xcott.com/
+
+# gcc 4.9
+https://en.wikipedia.org/wiki/Cilk_Plus