= gcc `-save-temps`
Saves preprocessor output and generated assembly to separate files.
* preprocessor:
* https://stackoverflow.com/questions/3742822/preprocessor-output/76127046\#76127046
* https://stackoverflow.com/questions/985403/seeing-expanded-c-macros/60816758\#60816758
* https://stackoverflow.com/questions/4900870/can-gcc-output-c-code-after-preprocessing/55477371\#55477371
* assembly:
* https://stackoverflow.com/questions/137038/how-do-you-get-assembler-output-from-c-c-source-in-gcc/56801917\#56801917