Summary of useful GCC and Clang compiler options

The following is a list of the compiler switches already encountered with the addition of other useful switches and why you might want to use them:

Switch	Description
-Wall	Turns on warnings for a wide variety of possible errors.
-Werror	Turns all warnings into errors.
-std=c11 -std=c18	Controls which C standard to use for compilation.
-D <symbol>	Defines the <symbol> macro.
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