--- build/moz.configure/init.configure.orig 2019-05-07 22:00:08.566365184 +0100 +++ build/moz.configure/init.configure 2019-05-07 22:03:54.337564868 +0100 @@ -733,7 +733,7 @@ def split_triplet(triplet, allow_msvc=Fa # The CPU granularity is probably not enough. Moving more things from # old-configure will tell us if we need more - if cpu.endswith("86") or (cpu.startswith("i") and "86" in cpu): + if cpu.endswith("586") or (cpu.startswith("i") and "586" in cpu): canonical_cpu = "x86" endianness = "little" elif cpu in ("x86_64", "ia64"):