New comment by q66 on void-packages repository

https://github.com/void-linux/void-packages/pull/26895#issuecomment-762225589

Comment:
hm, what i would do is instead of declaring like a variable `NO_ALTIVEC` or whatever, I would do like:

```
local extra_cflags="-fno-stack-protector"
case "$XBPS_TARGET_MACHINE" in
	ppc*) extra_cflags+=" -mno-altivec";;
esac
....
export CFLAGS+=" ${extra_cflags}"
... configure main platform here ....
...
for supplementary platforms:
    CFLAGS="${extra_cflags}" configure ...
```

which is the same logic as now but imo cleaner