Update readme

llvm-svn: 7859

runtime/README.txt

@@ -1,25 +1,4 @@
-Date: Wed, 6 Nov 2002 14:05:32 -0600 (CST)
-From: Chris Lattner <sabre@nondot.org>
-To: LLVMdev List <llvmdev@cs.uiuc.edu>
-Subject: What is test/Libraries?
-
-Hey everyone,
-
-There has recently been some confusion over what test/Libraries is and
-what it is used for.  The short answer is: it's used when building GCC,
-not for tests, so you all shouldn't need to use it.
-
-test/Libraries contains the LLVM "system libraries", which are linked to
-programs when the linker is run with the appropriate -l switch (for
-example -lm links in the "math" library).  In general, these libraries are
-just stubbed out libraries, because noone has had the time to do a full
-glibc port to LLVM.
-
-Problems arise because the makefiles have a number of hardcoded paths in
-it that are used to copy files around and install the libraries, which
-cause problems if anyone (except for me) uses them.  I'm sorry a better
-system isn't in place yet for these libraries, but if you just ignore
-them, they won't cause you any harm.  :)
-
--Chris
-
+This directory contains the various runtime libraries used by components of 
+the LLVM compiler.  For example, the automatic pool allocation transformation
+inserts calls to an external pool allocator library.  This runtime library is
+an example of the type of library that lives in these directories.