From: Ferruh Yigit <ferruh.yigit@amd.com>
To: Bruce Richardson <bruce.richardson@intel.com>
Cc: dev@dpdk.org, techboard@dpdk.org
Subject: Re: [PATCH] build: announce requirement for C11
Date: Wed, 3 May 2023 17:51:18 +0100 [thread overview]
Message-ID: <9d81667d-df78-0b6f-cb0a-62e9854195a3@amd.com> (raw)
In-Reply-To: <ZFKEdMP188QoJWYh@bricha3-MOBL.ger.corp.intel.com>
On 5/3/2023 4:57 PM, Bruce Richardson wrote:
> On Wed, May 03, 2023 at 04:39:14PM +0100, Ferruh Yigit wrote:
>> On 5/3/2023 4:14 PM, Bruce Richardson wrote:
>>> Add a deprecation notice informing users that we will require a C11
>>> compiler from 23.11 release onwards. This requirement was agreed by
>>> technical board to enable use of newer C language features, e.g.
>>> standard atomics. [1]
>>>
>>> [1] http://inbox.dpdk.org/dev/DBAPR08MB58148CEC3E1454E8848A938998AB9@DBAPR08MB5814.eurprd08.prod.outlook.com/
>>>
>>> Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
>>> ---
>>> doc/guides/rel_notes/deprecation.rst | 6 ++++++
>>> 1 file changed, 6 insertions(+)
>>>
>>> diff --git a/doc/guides/rel_notes/deprecation.rst b/doc/guides/rel_notes/deprecation.rst
>>> index dcc1ca1696..9a391d2c49 100644
>>> --- a/doc/guides/rel_notes/deprecation.rst
>>> +++ b/doc/guides/rel_notes/deprecation.rst
>>> @@ -11,6 +11,12 @@ here.
>>> Deprecation Notices
>>> -------------------
>>>
>>> +* C Compiler: From DPDK 23.11 onwards,
>>> + building DPDK will require a C compiler which supports the C11 standard, or later.
>>> + Please note:
>>> + - C11 is supported from GCC version 5 onwards, and is the default language version in that release
>>> + - C11 is the default compilation mode in Clang from version 3.6
>>> +
>>> * kvargs: The function ``rte_kvargs_process`` will get a new parameter
>>> for returning key match count. It will ease handling of no-match case.
>>>
>>
>> This only applies to DPDK internals, right?
>> Application linked with DPDK library won't have this requirement,
>> meaning DPDK public headers won't rely on C99 and C11 features.
>>
> No, AFAIK, that is not correct. Originally I had thought that that would be
> the case - hence the special-case tests for the headers in my previous C99
> patch - but the consensus at the DPDK techboard was that we won't require
> all headers to remain C89 compatible.
>
Ah, thanks for clarification. The previous patch made me think we are
keeping headers C89 compatible, I missed the final decision.
> Originally, I was unsure about this, but now I agree with this position, on
> the basis that since GCC 5, unless you have been explicitly requesting an
> older standard, the compiler is using C11 rules. Therefore, everyone using
> these later GCC versions is already using C11+.
>
Not just compiler version, application enforcing an old standard also
may cause trouble.
But I can see this is simpler from DPDK perspective.
next prev parent reply other threads:[~2023-05-03 16:51 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-05-03 15:14 Bruce Richardson
2023-05-03 15:35 ` Tyler Retzlaff
2023-05-03 15:37 ` Bruce Richardson
2023-05-03 15:39 ` Ferruh Yigit
2023-05-03 15:45 ` Tyler Retzlaff
2023-05-03 15:57 ` Bruce Richardson
2023-05-03 16:07 ` Tyler Retzlaff
2023-05-03 16:51 ` Ferruh Yigit [this message]
2023-05-03 17:30 ` [PATCH v2] " Bruce Richardson
2023-05-04 7:50 ` Mattias Rönnblom
2023-05-04 8:48 ` Bruce Richardson
2023-05-04 15:24 ` Tyler Retzlaff
2023-05-03 21:34 ` [PATCH] " Morten Brørup
2023-05-17 17:34 ` [PATCH v3] " Bruce Richardson
2023-05-19 12:19 ` Aaron Conole
2023-05-19 20:01 ` Tyler Retzlaff
2023-07-20 8:22 ` Bruce Richardson
2023-07-20 10:56 ` Jerin Jacob
2023-07-28 9:34 ` Thomas Monjalon
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