On 2/20/24 1:24 AM, Mike Gilbert wrote: > I'm afraid I get different results. Build log attached. Happy to help > figure this out tomorrow. > > To test, I applied this patch and ran this: > > ABI_X86="32 x32 64" CFLAGS="-O2 -pipe -march=amdfam10 -flto=2" ebuild > zstd-1.5.5-r1.ebuild clean configure Yikes. I wonder if this is also a problem for ffmpeg: multilib_src_configure() { [...] # LTO support, bug #566282, bug #754654, bug #772854 if [[ ${ABI} != x86 ]] && tc-is-lto; then # Respect -flto value, e.g -flto=thin local v="$(get-flag flto)" [[ -n ${v} ]] && myconf+=( "--enable-lto=${v}" ) || myconf+=( "--enable-lto" ) fi filter-lto -- Eli Schwartz