MAKEFILE_LIST += 'Makefile.env2'. MAKECMDGOALS = ''. EXPORTED_VAR = "hello". export(EXPORTED_VAR). "envtest3" <-- [], "echo $$EXPORTED_VAR >$@". EXPORTED_VAR2 = "world". export(EXPORTED_VAR2). "envtest4" <-- [], "echo $$EXPORTED_VAR2 >$@".