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So I use C++ heavily in the kernel. But couldn't you just set your own allocator and a couple other things and achieve the same effect and use the actual C++ ST
by maldev 7mo ago
So I use C++ heavily in the kernel. But couldn't you just set your own allocator and a couple other things and achieve the same effect and use the actual C++ STL? In kernel land, at the risk of simplifying, you just implement allocators and deallocators and it "just works", even on c++ 26.
- nly 7mo agoDo you typically just compile with -fno-rtti -fno-exceptions -nostdlib ? Last time I did embedded work this was basically all that was required.
- nulltrace 7mo agoThose three flags cover most of it. One gotcha: -fno-exceptions makes `new` return nullptr instead of throwing, so if any library code expects exceptions you get silent corruption. We added -fcheck-new to catch that. Also -nostdlib means no global constructors run, so static objects with nontrivial ctors need you to call __libc_init_array yourself.