To fix builds with _TIME_BITS=64, we need the following sanitizer changes backported to sys-devel/gcc (and sys-libs/compiler-rt-sanizers too): https://github.com/llvm/llvm-project/commit/26800a2c7e7996dc773b4e990dd5cca41c45e1a9 https://github.com/llvm/llvm-project/commit/a1217020da219386b29c1a5a4a217904ecf07d7d