diff -r 000000000000 -r 75a576e87639 README
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+++ b/README	Wed Apr 27 01:39:08 2016 +0800
@@ -0,0 +1,40 @@
+README:
+  This file should be located at the top of the OpenJDK Mercurial root
+  repository. A full OpenJDK repository set (forest) should also include
+  the following 6 nested repositories:
+    "jdk", "hotspot", "langtools", "corba", "jaxws"  and "jaxp".
+
+  The root repository can be obtained with something like:
+    hg clone http://hg.openjdk.java.net/jdk8/jdk8 openjdk8
+  
+  You can run the get_source.sh script located in the root repository to get
+  the other needed repositories:
+    cd openjdk8 && sh ./get_source.sh
+
+  People unfamiliar with Mercurial should read the first few chapters of
+  the Mercurial book: http://hgbook.red-bean.com/read/
+
+  See http://openjdk.java.net/ for more information about OpenJDK.
+
+Simple Build Instructions:
+  
+  0. Get the necessary system software/packages installed on your system, see
+     http://hg.openjdk.java.net/jdk8/jdk8/raw-file/tip/README-builds.html
+
+  1. If you don't have a jdk7u7 or newer jdk, download and install it from
+     http://java.sun.com/javase/downloads/index.jsp
+     Add the /bin directory of this installation to your PATH environment
+     variable.
+
+  2. Configure the build:
+       bash ./configure
+  
+  3. Build the OpenJDK:
+       make all
+     The resulting JDK image should be found in build/*/images/j2sdk-image
+
+where make is GNU make 3.81 or newer, /usr/bin/make on Linux usually
+is 3.81 or newer. Note that on Solaris, GNU make is called "gmake".
+
+Complete details are available in the file:
+     http://hg.openjdk.java.net/jdk8/jdk8/raw-file/tip/README-builds.html