From: Ray Kinsella <mdr@ashroe.eu>
To: Thomas Monjalon <thomas@monjalon.net>
Cc: Tyler Retzlaff <roretzla@linux.microsoft.com>,
dev@dpdk.org, david.marchand@redhat.com, techboard@dpdk.org,
David Christensen <drc@linux.vnet.ibm.com>
Subject: Re: [PATCH] eal/ppc: undefine AltiVec keyword vector
Date: Thu, 26 May 2022 12:02:51 +0100 [thread overview]
Message-ID: <87leuoblpg.fsf@mdr78.vserver.site> (raw)
In-Reply-To: <3966769.zXnORWrf4K@thomas>
Thomas Monjalon <thomas@monjalon.net> writes:
> 25/05/2022 20:34, Tyler Retzlaff:
>> On Wed, May 25, 2022 at 07:02:52PM +0100, Ray Kinsella wrote:
>> > Thomas Monjalon <thomas@monjalon.net> writes:
>> > > 25/05/2022 13:48, Ray Kinsella:
>> > >> Thomas Monjalon <thomas@monjalon.net> writes:
>> > >>
>> > >> > The AltiVec header file is defining "vector", except in C++ build.
>> > >> > The keyword "vector" may conflict easily.
>> > >> > As a rule, it is better to use the alternative keyword "__vector".
>> > >> >
>> > >> > The DPDK header file rte_altivec.h takes care of undefining "vector",
>> > >> > so the applications and dependencies are free to define the name "vector".
>> > >> >
>> > >> > This is a compatibility breakage for applications which were using
>> > >> > the keyword "vector" for its AltiVec meaning.
>> > >> >
>> > >> > Signed-off-by: Thomas Monjalon <thomas@monjalon.net>
>> > >> > ---
>> > >> > doc/guides/rel_notes/release_22_07.rst | 5 +++++
>> > >> > lib/eal/ppc/include/rte_altivec.h | 7 +++++++
>> > >> > 2 files changed, 12 insertions(+)
>> > >> >
>> > >>
>> > >> Acked-by: Ray Kinsella <mdr@ashroe.eu>
>> > >
>> > > Just to make sure, we are all OK to break compatibility of rte_altivec.h?
>> > > It means the keyword vector is not available anymore with this #include.
>> > > Please confirm it is OK to merge in DPDK 22.07.
>> >
>> > I did think about it yes ;-).
>> > I can't see how it would break the ABI in the short term.
>> > And it makes sense to preclude this keyword in the long term.
>> >
>> > So I ack'ed - did I miss something?
>>
>> Acked-by: Tyler Retzlaff <roretzla@linux.microsoft.com>
>>
>> double ack, impact of break is understood as follows.
>>
>> * this is not an issue with abi it is an issue with api.
>> * the break will cause a compile failure, the action to resolve is to
>> replace vector with __vector.
>
> Exactly
>
> I'll wait few days or acks from the techboard, and will apply.
+1
--
Regards, Ray K
next prev parent reply other threads:[~2022-05-26 11:03 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-25 9:53 Thomas Monjalon
2022-05-25 10:01 ` Tyler Retzlaff
2022-05-25 11:08 ` Ali Alnubani
2022-05-25 11:10 ` Ali Alnubani
2022-05-25 11:48 ` Ray Kinsella
2022-05-25 15:40 ` Thomas Monjalon
2022-05-25 18:02 ` Ray Kinsella
2022-05-25 18:34 ` Tyler Retzlaff
2022-05-26 10:18 ` Thomas Monjalon
2022-05-26 11:02 ` Ray Kinsella [this message]
2022-06-01 15:04 ` Thomas Monjalon
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