On Tue, Sep 10, 2024 at 03:29:08AM +0000, Ramana Radhakrishnan wrote:
> >>>>> diff --git a/config/bootstrap-native.mk b/config/bootstrap-native.mk
> >>>>> new file mode 100644
> >>>>> index 000000000000..a4a3d8594089
> >>>>> --- /dev/null
> >>>>> +++ b/config/bootstrap-native.mk
> >>>>> @@ -0,0 +1 @@
> >>>>> +BOOT_CFLAGS := -march=native -mtune=native $(BOOT_CFLAGS)
>
> Does every port have a -march=native + -mtune=native that behaves the same
> way as what is expected here ?
Not all of them do, but it's getting somewhat common with popular ones.
>
> >>>>> diff --git a/gcc/doc/install.texi b/gcc/doc/install.texi
> >>>>> index 4973f195daf9..29827c5106f8 100644
> >>>>> --- a/gcc/doc/install.texi
> >>>>> +++ b/gcc/doc/install.texi
> >>>>> @@ -3052,6 +3052,12 @@ Removes any @option{-O}-started option from
> >>>>> @code{BOOT_CFLAGS}, and adds
> >>>>> @itemx @samp{bootstrap-Og}
> >>>>> Analogous to @code{bootstrap-O1}.
> >>>>>
> >>>>> +@item @samp{bootstrap-native}
> >>>>> +@itemx @samp{bootstrap-native}
> >>>>> +Optimize the compiler code for the build host, if supported by the
> >>>>> +architecture. Note this only affects the compiler, not the targeted
> >>>>> +code. If you want the later use @samp{--with-cpu}.
> >>>>> +
>
> The defaults suitable for a port can be different , for instance on AArch32
> additional options to specify float abi and floating point units might be
> required.
> I would suggest rewriting this to something like . “If you want the later ,
> choose options suitable to the target you are looking for. For e.g.
> @samp{--with-cpu} would be a good starting point.”
Ok.
-Andi
