README: This file should be located at the top of the OpenJDK Mercurial repository forest. This top or enclosing repository will include a "make" directory, and a Makefile at the very top of the repository. It should also include the 6 repositories: "jdk", "hotspot", "langtools", "corba", "jaxws" and "jaxp". See http://openjdk.java.net/ for more information about the OpenJDK. Simple Build Instructions: 1. Download and install a JDK 6 from http://java.sun.com/javase/downloads/index.jsp Set the environment variable ALT_BOOTDIR to the location of this JDK 6. 2. Download and install the Binary Plugs for the most recent JDK7 from http://download.java.net/openjdk/jdk7/ Set the environment variable ALT_BINARY_PLUGS_PATH to the location of these binary plugs. 3. Check the sanity of doing a build with the current machine: gnumake sanity See README-builds.html if you run into problems. 4. Do a complete build of the jdk: gnumake all The resulting JDK image should be found in build/*/j2sdk-image where gnumake is GNU make 3.78.1 or newer, /usr/bin/make on Linux and /usr/sfw/bin/gmake or /opt/sfw/bin/gmake on Solaris.