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-rw-r--r--makefile.unix4
1 files changed, 4 insertions, 0 deletions
diff --git a/makefile.unix b/makefile.unix
index 87b6b653..f98e7662 100644
--- a/makefile.unix
+++ b/makefile.unix
@@ -118,6 +118,10 @@ GROFF = /usr/bin/groff
COL = /usr/bin/col
LDFLAGS = $(EXTRA_LIBS) $(EXTRA_FLAGS) -lm
+ifdef BITTRACE
+CFLAGS += -DBITTRACE=$(BITTRACE)
+endif
+
ANIM_UTIL_OBJS = \
examples/anim_util.o \