Re:An opinionated approach to GNU Make
by bauerd on Tuesday December 17, 2019 @03:10PM
(#21818182)
Not sure who you're responding to. I don't blame anything here, just illustrate what might cause confusion of tabs and spaces in Makefiles, namely unexpected filename suffixes. Holds true for other editors besides Emacs obviously.
It is your responsibility to let editors know that, be adding that magical first line to your make.