> On 9 Sep 2024, at 10:34 PM, Andi Kleen <a...@linux.intel.com> wrote: > > External email: Use caution opening links or attachments > > > Andi Kleen <a...@linux.intel.com> writes: > > Ping^4 > > Could someone please approve this (nearly trivial) patch? > > Thanks, > -Andi > >> Andi Kleen <a...@linux.intel.com> writes: >> >> Ping^3 >> >>> Andi Kleen <a...@linux.intel.com> writes: >>> >>> PING^2 for the patch. >>> >>> (not sure if there is any maintainer to cc here, this is generic build >>> infrastructure) >>> >>>> Andi Kleen <a...@linux.intel.com> writes: >>>> >>>> I wanted to ping this patch: >>>> >>>> https://gcc.gnu.org/pipermail/gcc-patches/2024-July/658729.html >>>> >>>> >>>>> From: Andi Kleen <a...@gcc.gnu.org> >>>>> >>>>> ... that uses -march=native -mtune=native to build a compiler optimized >>>>> for the host. >>>>> >>>>> config/ChangeLog: >>>>> >>>>> * bootstrap-native.mk: New file. >>>>> >>>>> gcc/ChangeLog: >>>>> >>>>> * doc/install.texi: Document bootstrap-native. >>>>> --- >>>>> config/bootstrap-native.mk | 1 + >>>>> gcc/doc/install.texi | 6 ++++++ >>>>> 2 files changed, 7 insertions(+) >>>>> create mode 100644 config/bootstrap-native.mk >>>>> >>>>> 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 ?
>>>>> 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.”
>>>>> @item @samp{bootstrap-lto}
>>>>> Enables Link-Time Optimization for host tools during bootstrapping.
>>>>> @samp{BUILD_CONFIG=bootstrap-lto} is equivalent to adding
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