I tested the deploy build of this jdk-8-ea-src-b255-solwin-20_mar_2012 and ran into some errors below caused by the lack of deploy/src/plugin/win32.

error pattern 1:
----->
make -C ../make/plugin all
make[3]: Entering directory `/cygdrive/e/jdkws/8/jdk-8-ea-src-b255-solwin-20_mar_2012/deploy/make/plugin'
make[3]: *** No rule to make target `../../src/plugin/win32/common/AUVersionInfo.h', needed by `E:/jdkws/8/jdk-8-ea-src-b255-solwin-20_mar_2012/build/windows-amd64/tmp/AUVersionInfo.h'. Stop.
make[3]: Leaving directory `/cygdrive/e/jdkws/8/jdk-8-ea-src-b255-solwin-20_mar_2012/deploy/make/plugin'
make[2]: *** [deploy] Error 2
make[2]: Leaving directory `/cygdrive/e/jdkws/8/jdk-8-ea-src-b255-solwin-20_mar_2012/deploy/make'
make[1]: *** [deploy-build] Error 2
make[1]: Leaving directory `/cygdrive/e/jdkws/8/jdk-8-ea-src-b255-solwin-20_mar_2012'
make: *** [build_product_image] Error 2
<-----

error pattern 2:
----->
make -C java all
make[4]: Entering directory `/cygdrive/e/jdkws/8/jdk-8-ea-src-b255-solwin-20_mar_2012/deploy/make/plugin/java'
ANT_OPTS=-Djava.io.tmpdir='E:/jdkws/8/jdk-8-ea-src-b255-solwin-20_mar_2012/build/windows-amd64/tmp' JAVA_HOME='E:/jdkws/8/jdk-8-ea-src-b255-solwin-20_mar_2012/build/windows-amd64/j2sdk-image' C:/apache-ant-1.8.2/bin/ant -f ../../../make/ant/plugin.build.xml
Buildfile: E:\jdkws\8\jdk-8-ea-src-b255-solwin-20_mar_2012\deploy\make\ant\plugin.build.xml

-init:

compile:
     [echo] Output dir E:\jdkws\8\jdk-8-ea-src-b255-solwin-20_mar_2012\build\windows-amd64\tmp\deploy
    [mkdir] Created dir: E:\jdkws\8\jdk-8-ea-src-b255-solwin-20_mar_2012\build\windows-amd64\tmp\deploy\classes\plugin

BUILD FAILED
E:\jdkws\8\jdk-8-ea-src-b255-solwin-20_mar_2012\deploy\make\ant\plugin.build.xml:90: srcdir "E:\jdkws\8\jdk-8-ea-src-b255-solwin-20_mar_2012\deploy\src\plugin\win32\classes" does not exist!

Total time: 1 second
make[4]: *** [build] Error 1
make[4]: Leaving directory `/cygdrive/e/jdkws/8/jdk-8-ea-src-b255-solwin-20_mar_2012/deploy/make/plugin/java'
make[3]: *** [java] Error 2
make[3]: Leaving directory `/cygdrive/e/jdkws/8/jdk-8-ea-src-b255-solwin-20_mar_2012/deploy/make/plugin'
make[2]: *** [deploy] Error 2
make[2]: Leaving directory `/cygdrive/e/jdkws/8/jdk-8-ea-src-b255-solwin-20_mar_2012/deploy/make'
make[1]: *** [deploy-build] Error 2
make[1]: Leaving directory `/cygdrive/e/jdkws/8/jdk-8-ea-src-b255-solwin-20_mar_2012'
make: *** [build_product_image] Error 2
<-----

The command I used to build(exluding CORBA and INSTALL) is

$ cd jdk-8-ea-src-b255-solwin-20_mar_2012
$ make