Hello, On Sun, Dec 18 2022, Mohamed Atef wrote: > Hello, > I am interested in working in this project during my free time, is > understanding this https://gcc.gnu.org/wiki/LinkTimeOptimization > A good starting point
That section of the Wiki is very old. You may find bits there that are still valid and relevant, but I would be actually a bit careful with that content. If you're looking for high-level overview of LTO, unfortunately I can only recommend videos: - Honza's "Building openSUSE with GCC's link time optimization" https://events.opensuse.org/conferences/oSC18/program/proposals/1846#2 - my "Interprodecural optimizations in GCC" https://www.youtube.com/watch?v=oQ71ZbOuSW4 (the first 12 minutes or so, the rest is then about optimizations) For the task specifically, the patch from 2014 https://gcc.gnu.org/legacy-ml/gcc/2014-09/msg00340.html is still a good starting point, even if not a very clear one. The crux of the matter is to enhance libiberty/simple-object*.[ch] to be able to create elf from scratch (as opposed to modifying an existing one). So look there too. If you have any questions, feel free to ask. Good luck, Martin