https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118136
--- Comment #6 from Andrew Pinski <pinskia at gcc dot gnu.org> --- So in summary the following is the point. If you are defining your custom start function, it becomes a non-hosted env and/or implemented defined area. This means it can't be LTO'ed since it can't constrained by the hosted env part of C since C defines start being main for hosted env. For a free-standing env in C, then the rules for main don't apply and the standard C function rules apply for functions called main and you are just doing undefined behavior like any other function would be. You can't be both free-standing and hosted at the same time. You have chose between the 2.
