[Bug target/104189] enable 64-bit compare-and-swap on SPARC/Linux with V9

[glaubitz at physik dot fu-berlin.de via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104189

--- Comment #8 from John Paul Adrian Glaubitz <glaubitz at physik dot 
fu-berlin.de> ---
Any updates on this?