build error jdk14

[mgates]

Linking vm...
interpreterRT_i486.o: file not recognized: File truncated
gmake[3]: *** [libjvm_g.so] Error 1
gmake[3]: Leaving directory `/usr/ports/java/jdk14/work/control/build/bsd-i586/hotspot-i586/tmp/bsd_i486_compiler2/jvmg'
gmake[2]: *** [the_vm] Error 2
gmake[2]: Leaving directory `/usr/ports/java/jdk14/work/control/build/bsd-i586/hotspot-i586/tmp/bsd_i486_compiler2/jvmg'
gmake[1]: *** [jvmg] Error 2
gmake[1]: Leaving directory `/usr/ports/java/jdk14/work/control/build/bsd-i586/hotspot-i586/tmp'
gmake: *** [jvmg] Error 2
*** Error code 2

Stop in /usr/ports/java/jdk14.

After building for a few days my computer rebooted and I tried to restart the build and it seemed to work upto the linking stage.
Obviously something went amiss at the point interpreterRT_i486. Is there a way I can recompile the part I need without having to
make clean; make install all over again? How would this be done or must I recompile everything?

thanks
marco