There is a new pull request by leahneukirchen against master on the void-packages repository

https://github.com/leahneukirchen/void-packages gcc-multilib-flags
https://github.com/void-linux/void-packages/pull/26504

gcc-multilib: enable PIE and SSP.
Don't diverge from features of main gcc package.

A patch file from https://github.com/void-linux/void-packages/pull/26504.patch is attached