#T environment: {'ENVVAR': 'envval'} VAR1 = val1 VAR2 = val2 VAR3 = val3 unexport VAR3 export VAR1 VAR2 VAR3 unexport VAR2 ENVVAR unexport all: test "$(ENVVAR)" = "envval" # unexport.mk $(MAKE) -f $(TESTPATH)/unexport.submk @echo TEST-PASS