As I see, this turned out to be a combination of a local patch applied to atexit.c. The patch introduces cleanup of additionally allocated fl chunks allocated by calloc calls in __cxa_atexit. I think I can upstream the patch upon a brief adaptation to match the styleguide. What do you think? NB: I am not a subscriber of this list and would like to be cc'd with any replies. Thanks in advance. Yuriy. On Wed, 20 Jan 2021 at 16:54, Yuriy Chernyshov wrote: > Hello everyone, > 34952fe5de44a833370cbe87b63fb8eec61466d7 introduced safeguard for using of > undefined memory (de)allocation functions: > https://git.musl-libc.org/cgit/musl/commit/?id=34952fe5de44a833370cbe87b63fb8eec61466d7 > > However, in src/exit/atexit.c either this commit or the code is buggy, as > it has: > > #define free undef > > ... free(something) > > This results in linkage error of every program being linked to musl. > Could you, please, advice me on how to fix this? > > Regards, > Yuriy. >