On Wed, Apr 22, 2020 at 05:48:27PM +0100, Steve McIntyre wrote: > I think the -moutline-atomics is probably good to enable by default > once we've got it (gcc 10). that's the suggestion I've heard from gcc > folks in Arm. JFTR, it's been backported to gcc 9 and is available in Debian's gcc-9 as of 9.3.0-9. See https://salsa.debian.org/toolchain-team/gcc/-/blob/gcc-9-debian/debian/patches/git-updates.diff noah