IsActionOpt returns true if the given string is an ActionOpt, otherwise false.

IsSourceFile returns true if the given file is a source file recognized by GCC, otherwise false.

NewArgParser creates a new ArgsInfo struct from the provided args Args should NOT include the command (argv[0]).

NewArgsInfoFromOS creates a new ArgsInfo struct from os.Args.

ReplaceExtension replaces the file extension of the given path.

ShouldRunLocal returns true if the given file should be compiled locally as a special case.

ArgParser represents GCC arguments.