Re: [PATCH v3 11/12] meson: Deprecate 32-bit host support

["Philippe Mathieu-Daudé" <philmd@linaro.org>]

On 5/2/25 19:12, Richard Henderson wrote:
> On 2/5/25 10:05, Philippe Mathieu-Daudé wrote:
>> On 4/2/25 22:53, Richard Henderson wrote:
>>> We deprecated i686 system mode support for qemu 8.0.  However, to
>>> make real cleanups to TCG we need to deprecate all 32-bit hosts.
>>>
>>> Reviewed-by: Thomas Huth <thuth@redhat.com>
>>> Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
>>> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
>>> ---
>>>   docs/about/deprecated.rst | 7 +++++++
>>>   meson.build               | 8 +++-----
>>>   2 files changed, 10 insertions(+), 5 deletions(-)


>>> diff --git a/meson.build b/meson.build
>>> index aa1ca8355d..3347b0a553 100644
>>> --- a/meson.build
>>> +++ b/meson.build
>>> @@ -4843,14 +4843,12 @@ if host_arch == 'unknown'
>>>       message('configure has succeeded and you can continue to build, 
>>> but')
>>>       message('QEMU will use a slow interpreter to emulate the target 
>>> CPU.')
>>>     endif
>>> -elif host_arch == 'mips'
>>> +elif host_long_bits < 64
>>>     message()
>>>     warning('DEPRECATED HOST CPU')
>>>     message()
>>> -  message('Support for CPU host architecture ' + cpu + ' is going to 
>>> be')
>>> -  message('dropped as soon as the QEMU project stops supporting 
>>> Debian 12')
>>> -  message('("Bookworm"). Going forward, the QEMU project will not 
>>> guarantee')
>>> -  message('that QEMU will compile or work on this host CPU.')
>>> +  message('Support for 32-bit CPU host architecture ' + cpu + ' is 
>>> going')
>>> +  message('to be dropped in a future QEMU release.')
>>
>> This change still allows us to remove 32-bit mips host support before
>> the other architectures, right?
> No, bookworm goes into LTS in June 2026, which would match QEMU 11.1 
> release.
> If we add this now, we could (selectively) remove 32-bit support earlier 
> than that.

Great.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>