This is “Copy-Pasta Driven Development” [0] and it’s not even related to makefiles. It’s related to the entire industry copying code from here to there without even knowing what they are copying.
TBH I think copilot has made this even worse, as we are blindly accepting chucks of code into our code bases.
[0] https://andrew.grahamyooll.com/blog/copy-pasta-driven-develo...
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