Re: [Qemu-devel] [PULL 25/26] block: Remove deprecated -drive option serial

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Markus Armbruster <armbru@xxxxxxxxxx> writes:

> Kevin Wolf <kwolf@xxxxxxxxxx> writes:
>
>> Am 10.07.2018 um 16:22 hat Cornelia Huck geschrieben:
>>> On Tue, 10 Jul 2018 07:59:15 +0200
>>> Markus Armbruster <armbru@xxxxxxxxxx> wrote:
>>> 
>>> > In addition to actively pulling libvirt developers into review of
>>> > deprecation patches, we should pursue the idea to optionally let QEMU
>>> > fail on use of deprecated features, then have libvirt run its test suite
>>> > that way.
>>> 
>>> What about the following:
>>> 
>>> qemu_deprecated_option("old_option", "modern_option");
>>> 
>>> Which would then print (in normal operation)
>>> 
>>> "WARNING: 'old_option' is deprecated and will be removed; use 'modern_option' instead"
>>> 
>>> to the monitor (or to stderr? to both?).
>>> 
>>> If you start QEMU with a -no-deprecated-options switch, it would print
>>> 
>>> "ERROR: 'old_option' is deprecated and will be removed; use 'modern_option' instead"
>>> 
>>> and do an exit(1).
>>> 
>>> Would that be workable?
>>
>> I think the function should just take a message:
>>
>>     /* Works like error_report(), except for the WARNING/ERROR prefix
>>      * and exit(1) if -no-deprecated-options is set */
>>     void deprecation_report(const char *fmt, ...);
>
> I like it.  The contract could use a bit of polish, but that's detail.

Suggest --deprecated={silent,warn,error}, default silent.

[...]

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