errors.c: clear traceback too.
Makefile.in: remove lib*.a before creating new one.
diff --git a/Python/Makefile.in b/Python/Makefile.in
index f61fea8..ba69a60 100644
--- a/Python/Makefile.in
+++ b/Python/Makefile.in
@@ -20,7 +20,7 @@
# === Other things that are customizable but not by configure ===
INCLDIR= $(srcdir)/../Include
-OPT= -O
+OPT= @OPT@
CFLAGS= $(OPT) -I$(INCLDIR) -I.. $(DEFS)
MKDEP= mkdep
@@ -52,6 +52,7 @@
all: $(LIB)
$(LIB): $(OBJS)
+ -rm -f $(LIB)
$(AR) cr $(LIB) $(OBJS)
$(RANLIB) $(LIB)