Re: [PATCH] qtests: avoid printing comments before g_test_init()

[Juan Quintela <quintela@redhat.com>]

Thomas Huth <thuth@redhat.com> wrote:
> On 23/03/2023 19.31, Juan Quintela wrote:
>> Daniel P. Berrangé <berrange@redhat.com> wrote:
>>> The TAP protocol version line must be the first thing printed on
>>> stdout. The migration test failed that requirement in certain
>>> scenarios:
>>>
>>>    # Skipping test: Userfault not available (builtdtime)
>>>    TAP version 13
>>>    # random seed: R02Sc120c807f11053eb90bfea845ba1e368
>>>    1..32
>>>    # Start of x86_64 tests
>>>    # Start of migration tests
>>>    ....
>>>
>>> The TAP version is printed by g_test_init(), so we need to make
>>> sure that any methods which print are run after that.
>>>
>>> Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
>>> ---
>> Reviewed-by: Juan Quintela <quintela@redhat.com>
>> 
>>> -    const bool has_kvm = qtest_has_accel("kvm");
>>> -    const bool has_uffd = ufd_version_check();
>>> -    const char *arch = qtest_get_arch();
>>> +    bool has_kvm;
>>> +    bool has_uffd;
>>> +    const char *arch;
>> Why don't you move also the declarations of the variables?
>> I think that one of the biggest troubles of C is variables that are not
>> initialized.
>> All compilers that we support are C99 or later, so we can do that
>> (and
>> we already do in lot of places.)
>
> I think the coding style has been created before we switched to
> -std=gnu99 for compiling QEMU, so a lot of GCCs were still using C89
> by default?

Yes, that is the actitude.

I got sick when I see new code that still does:

char *foo = (char *)malloc(...);

It is is C89, it has been enough to know that it is not needed.

And yes, that particular one is not used in qemu anymore, but:

void *opaque;

....

Foo *foo = (Foo *)opaque;

Is still introduced in new code, and it is not needed since C89.

>> And yeap, I know that CodingStyle says otherwise, but I think that what
>> is wrong is CodingStyle.
>> https://lists.gnu.org/archive/html/qemu-devel/2023-02/msg03836.html
>
> Please use proper prefixes in the subject when sending patches
> ("docs/devel:" here), otherwise your patches might not get the right
> attention (at least on my side, it was filtered away as a patch that
> was relevant to me) - and also put some recent contributors on CC:

I didn't knew the docs/devel preffix.

About the CC'd, I expected that git-publish be good enough at doing
that, but it appears not.

Anyways, thanks.

Later, Juan.