Build openjdk?

[Peng Yu]

Hi,

README of openjdk-7-ea-src-b71-03_sep_2009 says the following. I am
wondering why I need step 1. Can I start with step 2 directly?

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


Regards,
Peng