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 7 nested repositories:
    "jdk", "hotspot", "langtools", "nashorn", "corba", "jaxws"  and "jaxp".

  The root repository can be obtained with something like:
    hg clone openjdk9
  You can run the script located in the root repository to get
  the other needed repositories:
    cd openjdk9 && sh ./

  People unfamiliar with Mercurial should read the first few chapters of
  the Mercurial book:

  See for more information about OpenJDK.

Simple Build Instructions:
  0. Get the necessary system software/packages installed on your system, see

  1. If you don't have a jdk8 or newer jdk, download and install it from
     Add the /bin directory of this installation to your PATH environment

  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: