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  * [make is picking up executable instead of target, make execute a target from another target]
    * https://stackoverflow.com/questions/3267145/makefile-execute-another-target

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  * In the context of makefiles, what does '@' at the beginning of the line do?
    * When @ is used at the very beginning of a recipe (command) line, just after the tab character, it causes the command not to be printed when it's about to be executed.
      * https://unix.stackexchange.com/questions/192241/file-function-in-makefile-takes-args-prefixed-by-symbol