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From: "neoxic at icloud dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/106939] Linker-defined symbols are stained due to 'array
 subscript is partly outside array bounds' warning
Date: Wed, 14 Sep 2022 18:41:38 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D106939

--- Comment #6 from Arseny Vakhrushev <neoxic at icloud dot com> ---
Lots of thanks again, Andrew!

----------------------------------------------
#include <string.h>
#include <stdint.h>

extern char _dst[], _src[], _end[];

int main(void) {

        memcpy(_dst, _src, _end - _src);

        uint32_t *dst =3D (uint32_t *)_dst;
        uint32_t *src =3D (uint32_t *)_src;
        uint32_t *end =3D (uint32_t *)_end;
        while (src < end) *dst++ =3D *src++;

        return 0;
}
-----------------------------------------------

Well, I hope I'm not doing anything terribly wrong, but the above works very
nice for me, looks clean, involves pointer arithmetics and doesn't produce =
any
warnings. I also can't really understand how it is possible for pointer
comparison to be undefined. If you could point me to the corresponding C
standard section, I would really appreciate that! Thanks a lot again!=