New comment by q66 on void-packages repository

https://github.com/void-linux/void-packages/pull/11521#issuecomment-489455286
Comment:
Looks like a problem in gcc specific to ppc64; additionally, this looks like it has been fixed upstream, see https://github.com/gcc-mirror/gcc/commit/cdfc600453447b283157b8bfdb2e9283fde2cead#diff-058e14c90a93b8e94ea4857186800d63 , the `rs6000/sysv4.h` changes.