This is for jdk 8u and it was a 32 bit build.

I started with a fresh clone, built it OK, and then imported a patch via hg import which updated some native and some java code. The native code rebuilt OK.

## Starting jdk
Compiling 2 files for BUILD_ACCESSBRIDGE_32
Compiling 2 files for BUILD_ACCESSBRIDGE_LEGACY
AccessBridgeJavaEntryPoints.cpp
AccessBridgeJavaEntryPoints.cpp
   Creating library
c:/Users/Pete/JDK8u/JDK-8050280/jdk8/build/windows-x86-normal-server-release/jdk/objs/libjavaaccessbridge-32/JavaAccessBridge-32.lib
and object
c:/Users/Pete/JDK8u/JDK-8050280/jdk8/build/windows-x86-normal-server-release/jdk/objs/libjavaaccessbridge-32/JavaAccessBridge-32.exp

   Creating library
c:/Users/Pete/JDK8u/JDK-8050280/jdk8/build/windows-x86-normal-server-release/jdk/objs/libjavaaccessbridge/JavaAccessBridge.lib
and object
c:/Users/Pete/JDK8u/JDK-8050280/jdk8/build/windows-x86-normal-server-release/jdk/objs/libjavaaccessbridge/JavaAccessBridge.exp

## Finished jdk (build time 00:00:27)

but the Java code didn't rebuild, i.e. a jar file wasn't rebuilt. The source file in question is
jdk/src/closed/windows/classes/com/sun/java/accessibility/AccessBridge.java.
The file that should have been rebuilt in lib\ext is access-bridge-32.jar.

I later did make clean-jdk and rebuilt and images/j2re-image/lib/ext/access-bridge-32.jar still didn't rebuild.