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-rw-r--r--Makefile.rules4
1 files changed, 2 insertions, 2 deletions
diff --git a/Makefile.rules b/Makefile.rules
index 0787891f7a..9152f8edc6 100644
--- a/Makefile.rules
+++ b/Makefile.rules
@@ -550,7 +550,7 @@ endif
# Create a TAGS database for emacs
#------------------------------------------------------------------------
-ifdef ETAGS
+ifneq ($(ETAGS),false)
ifeq ($(LEVEL), .)
SRCDIRS := $(wildcard $(SourceDir)/include $(SourceDir)/lib $(SourceDir)/tools)
@@ -729,7 +729,7 @@ YACC_OUTPUT = $(addprefix $(YACC_FILES:%.y=%), .h .cpp .output)
@$(DATE) > $@
# To create postscript files from dot files...
-ifdef DOT
+ifneq ($(DOT),false)
%.ps: %.dot
${DOT} -Tps < $< > $@
else