It is more efficient to use := to when the value of the assignment is

$(shell ...).
2001-06-02 03:03:58 +00:00 · 2001-06-02 03:03:58 +00:00 · 12c47a150a
--- a/security/nss/lib/freebl/Makefile
+++ b/security/nss/lib/freebl/Makefile
@ -286,7 +286,7 @@ FILES2LN = \

 LINKEDFILES = $(addprefix $(PURE32DIR)/, $(FILES2LN))

-CDDIR=$(shell pwd)
+CDDIR := $(shell pwd)

 $(PURE32DIR):
 	-mkdir $(PURE32DIR)