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+System Utilities Interface
+==========================
+
+The design of this library has several key constraints aimed at shielding LLVM
+from the vagaries of operating system differences. The goal here is to provide
+interfaces to operating system concepts (files, memory maps, sockets, signals,
+locking, etc) efficiently and in such a way that the remainder of LLVM is
+completely operating system agnostic. 
+
+PLEASE READ AND COMPREHEND FULLY THE DOCUMENTATION in 
+
+llvm/docs/SystemLibrary.html 
+
+before making changes to this library.