Gnumake says:
gnumake[3]: Entering directory `/net/mmm/export/home/jjh/ws/tiger-control/j2se/make/java/java'
Makefile:313: warning: overriding commands for target `../../../build/solaris-sparc/gensrc/java/lang'
Makefile:214: warning: ignoring old commands for target `../../../build/solaris-sparc/gensrc/java/lang'

The target appears twice in the make file. EG:
$(GENSRCDIR)/java/lang:
$(MKDIR) -p $(GENSRCDIR)/java/lang
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