I see these errors when doing a build from scratch:

make[2]: Entering directory `/u/martin/ws/jsr166/make/sun/motif21'
# Running javah:
../../../build/solaris-i586/bin/javah -J-client -J-XX:ThreadStackSize=768 -jni -bootclasspath ../../../build/solaris-i586/classes \
-d ../../../build/solaris-i586/tmp/sun/sun.awt/motif21/CClassHeaders/ \
....
java.io.InputStream java.lang.ThreadGroup sun.io.CharToByteConverter sun.io.ByteToCharConverter
error: cannot access sun.io.CharToByteConverter
file sun/io/CharToByteConverter.class not found
javadoc: error - Class sun.io.CharToByteConverter not found.
javadoc: error - Class sun.io.ByteToCharConverter not found.
3 errors
Begin parallel compiles: /u/martin/ws/jsr166/make/sun/motif21