5. Compilation
Before continuing, let’s review how computer programs get made. If you’re coming to Xcode from long experience with GNU Make or another development environment, this discussion will be very familiar to you. Bear with me: I’m going back to basics so every reader will be on a par for what they know about the build process.
Programmers use source code to specify what a program does; source code files contain a notation that, although technical and sometimes cryptic, is recognizably the product of a human, intended in part for humans to read. Even the most precise human communication leaves to allusion and implication things that a computer has to have spelled out. If a passer-rating tool were to refer to the local variable yardageComp ...
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