src/third_party/mozjs-45/build/pymake/tests/env-var-append.mk - cobalt - Git at Google

 #T environment: {'FOO': 'TEST'}

 FOO += $(BAR)
 BAR := PASS

 all:
 	@echo $(subst $(NULL) ,-,$(FOO))
	#T environment: {'FOO': 'TEST'}

	FOO += $(BAR)
	BAR := PASS

	all:
	@echo $(subst $(NULL) ,-,$(FOO))