re: port-sparc/58352: ld: /usr/lib/libubsan.so: undefined reference to `__sync_val_compare_and_swap_8'

[matthew green <mrg%eterna23.net@localhost>]

> Yeah, this is just what I tried. It works at least on i386, but
> diff is *really* large:
>
> https://gist.github.com/rokuyama/24d0ed7e537fffc07e2975c3880817f1

i don't think this is that large.

the only thing i'd really prefer would be to move the define
for SANITIZER_NO_64BIT_ATOMIC_OPS from the Makefile into a common
header such that you can define SANITIZER_STATE_T like you have.

in the common header (not sure which one off hand), inside a
SANITIZER_NETBSD section, check for our __HAVE_64BIT_ATOMIC_OPS
or whatever it is, and define SANITIZER_NO_64BIT_ATOMIC_OPS to
suit...


i think this is do-able.  it's slightly more diffs than the
current ones in gcc/dist/libsanitizer, but most of it is one
bigger chunk, and all of them are fairly simple conversion
(u64 -> SANITIZER_STATE_T), so keeping it in the future would
not be too hard.  (it only adds about 4% to the total in all
of gcc/dist.)

thanks.


.mrg.