From the Ancient Greek root Ï€Ïá¾¶Î³Î¼Î± (pragma, “a thing done, a fact"). May be a back-formation from pragmatic.
pragma - Computer Definition
A message written into the source code that tells the compiler to compile the program in some fashion that differs from the default method. For example, pragmas may alter the kinds of error messages that are generated or optimize the machine code in some way.