Here's an example building jdk9/dev:

:
Updating rt.jar profile_2
Updating rt.jar profile_1
Updating rt.jar profile_3
Analyzing /u/albatem/ws/jdk9-dev/build/linux-x86_64-normal-server-release/images/j2re-compact2-image/lib/resources.jar
Analyzing /u/albatem/ws/jdk9-dev/build/linux-x86_64-normal-server-release/images/j2re-compact2-image/lib/jsse.jar
Analyzing /u/albatem/ws/jdk9-dev/build/linux-x86_64-normal-server-release/images/j2re-compact1-image/lib/resources.jar
Analyzing /u/albatem/ws/jdk9-dev/build/linux-x86_64-normal-server-release/images/j2re-compact1-image/lib/jsse.jar
Analyzing /u/albatem/ws/jdk9-dev/build/linux-x86_64-normal-server-release/images/j2re-compact2-image/lib/jce.jar
Analyzing /u/albatem/ws/jdk9-dev/build/linux-x86_64-normal-server-release/images/j2re-compact1-image/lib/jce.jar
Analyzing /u/albatem/ws/jdk9-dev/build/linux-x86_64-normal-server-release/images/j2re-compact2-image/lib/rt.jar
Analyzing /u/albatem/ws/jdk9-dev/build/linux-x86_64-normal-server-release/images/j2re-compact1-image/lib/rt.jar
Analyzing /u/albatem/ws/jdk9-dev/build/linux-x86_64-normal-server-release/images/j2re-compact3-image/lib/resources.jar
Analyzing /u/albatem/ws/jdk9-dev/build/linux-x86_64-normal-server-release/images/j2re-compact3-image/lib/jsse.jar
Analyzing /u/albatem/ws/jdk9-dev/build/linux-x86_64-normal-server-release/images/j2re-compact3-image/lib/jce.jar
Analyzing /u/albatem/ws/jdk9-dev/build/linux-x86_64-normal-server-release/images/j2re-compact3-image/lib/rt.jar
sun.datatransfer.DesktopDatatransferService -> java.awt.datatransfer.FlavorMap (unknown type)
sun.datatransfer.DataFlavorUtil -> java.awt.datatransfer.FlavorMap (unknown type)
sun.datatransfer.DesktopDatatransferService -> java.awt.datatransfer.DataFlavor (unknown type)
sun.datatransfer.DataFlavorUtil -> java.awt.datatransfer.DataFlavor (unknown type)
One or more unexpected references encountered
Check /u/albatem/ws/jdk9-dev/build/linux-x86_64-normal-server-release/jdk/btclasses/build/tools/deps/refs.allowed is up to date
make[3]: *** [/u/albatem/ws/jdk9-dev/build/linux-x86_64-normal-server-release/images/libprofile_1/_jars_checked] Error 255
make[2]: *** [profile_1-images] Error 2
make[2]: *** Waiting for unfinished jobs....
sun.datatransfer.DesktopDatatransferService -> java.awt.datatransfer.FlavorMap (unknown type)
sun.datatransfer.DataFlavorUtil -> java.awt.datatransfer.FlavorMap (unknown type)
sun.datatransfer.DesktopDatatransferService -> java.awt.datatransfer.DataFlavor (unknown type)
sun.datatransfer.DataFlavorUtil -> java.awt.datatransfer.DataFlavor (unknown type)
One or more unexpected references encountered
Check /u/albatem/ws/jdk9-dev/build/linux-x86_64-normal-server-release/jdk/btclasses/build/tools/deps/refs.allowed is up to date
make[3]: *** [/u/albatem/ws/jdk9-dev/build/linux-x86_64-normal-server-release/images/libprofile_2/_jars_checked] Error 255
make[2]: *** [profile_2-images] Error 2
sun.datatransfer.DesktopDatatransferService -> java.awt.datatransfer.FlavorMap (unknown type)
sun.datatransfer.DataFlavorUtil -> java.awt.datatransfer.FlavorMap (unknown type)
sun.datatransfer.DesktopDatatransferService -> java.awt.datatransfer.DataFlavor (unknown type)
sun.datatransfer.DataFlavorUtil -> java.awt.datatransfer.DataFlavor (unknown type)
One or more unexpected references encountered
Check /u/albatem/ws/jdk9-dev/build/linux-x86_64-normal-server-release/jdk/btclasses/build/tools/deps/refs.allowed is up to date
make[3]: *** [/u/albatem/ws/jdk9-dev/build/linux-x86_64-normal-server-release/images/libprofile_3/_jars_checked] Error 255
make[2]: *** [profile_3-images] Error 2
make[1]: *** [main-wrapper] Error 2
make: *** [profiles] Error 2