# Create a TAGS database for emacs
#------------------------------------------------------------------------
-ifdef ETAGS
+ifneq ($(ETAGS),false)
ifeq ($(LEVEL), .)
SRCDIRS := $(wildcard $(SourceDir)/include $(SourceDir)/lib $(SourceDir)/tools)
@$(DATE) > $@
# To create postscript files from dot files...
-ifdef DOT
+ifneq ($(DOT),false)
%.ps: %.dot
${DOT} -Tps < $< > $@
else