You can pass options to the assembler.
Pass option as an option to the assembler. If option contains commas, it is split into multiple options at the commas.
Pass option as an option to the assembler. You can use this to supply system-specific assembler options that GCC does not recognize.
If you want to pass an option that takes an argument, you must use -Xassembler twice, once for the option and once for the argument.