Makefile Optimization: $(shell) and := go Together
and $(shell) in your Makefile is to run the command:
grep -n \$\(shell Makefile | grep -v :=
It'll print out the line number and details of every line in Makefile that contains a $(shell) and doesn't contain a :=. Take a look at what it finds to see if your Makefile can be optimized.
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