X86_64: CONFIG_GCC_DEFAULT_PIE disable by default?

CONFIG_GCC_DEFAULT_PIE is not enabled by default on the x86_64 tree - Is this intentional? AFAIK, this allows the build-system's gcc to actually be able to use PIE.

I'm working on the x86_64-openwrt-linux-musl rust-lang toolchain and I enabled it (or rather, left it enabled by default) because I can't think of a reason OpenWrt wouldn't be using it.

So, the question is: Do I remove PIE from the rust-lang toolchain for x86_64, or was this just not enabled sometime in the past by accident?