On Thu, Apr 30, 2020 at 3:16 AM Carl Eugen Hoyos <ceffm...@gmail.com> wrote:
> Shouldn't --disable-power8 also disable power9 (assuming there is a
> difference)?
>
No it should not. From my understanding, the `--enable-power8` flag is used
to determine if the version `altivec.h` supports the macro `_ARCH_PWR8` or
not:
```code
if enabled power8; then
check_cpp_condition power8 "altivec.h" "defined(_ARCH_PWR8)"
fi
```
Thus --disable-power8 should have no effect on power9 flag because power9
uses a different `_ARCH_PWR9` macro.
The question is do we want to expose the `--disable-power[8|9]` flags?
Should the `--cpu=power[8|9]` flags implicitly perform the cpp condition
check?
Kind regards
>
> Carl Eugen
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