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Wed, 7 Jul 2021 16:35:58 -0400 (EDT) From: Thomas Monjalon <thomas@monjalon.net> To: Tyler Retzlaff <roretzla@linux.microsoft.com> Cc: dev@dpdk.org, ferruh.yigit@intel.com, dmitry.kozliuk@gmail.com, david.marchand@redhat.com Date: Wed, 07 Jul 2021 22:35:56 +0200 Message-ID: <5114228.tcCnuoUIAK@thomas> In-Reply-To: <20210707202334.GA1370@linuxonhyperv3.guj3yctzbm1etfxqx2vob5hsef.xx.internal.cloudapp.net> References: <20210623182657.GA24634@linuxonhyperv3.guj3yctzbm1etfxqx2vob5hsef.xx.internal.cloudapp.net> <2661083.m9YJQ7Gqa3@thomas> <20210707202334.GA1370@linuxonhyperv3.guj3yctzbm1etfxqx2vob5hsef.xx.internal.cloudapp.net> MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="us-ascii" Subject: Re: [dpdk-dev] [RFC] toolchain specific macro expansion X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions <dev.dpdk.org> List-Unsubscribe: <https://mails.dpdk.org/options/dev>, <mailto:dev-request@dpdk.org?subject=unsubscribe> List-Archive: <http://mails.dpdk.org/archives/dev/> List-Post: <mailto:dev@dpdk.org> List-Help: <mailto:dev-request@dpdk.org?subject=help> List-Subscribe: <https://mails.dpdk.org/listinfo/dev>, <mailto:dev-request@dpdk.org?subject=subscribe> Errors-To: dev-bounces@dpdk.org Sender: "dev" <dev-bounces@dpdk.org> 07/07/2021 22:23, Tyler Retzlaff: > On Thu, Jun 24, 2021 at 06:29:20PM +0200, Thomas Monjalon wrote: > > 24/06/2021 18:02, Tyler Retzlaff: > > > On Thu, Jun 24, 2021 at 08:54:49AM +0200, Thomas Monjalon wrote: > > > > 23/06/2021 20:26, Tyler Retzlaff: > > > > > // lib/eal/gcc/rte_toolchain_common.h > > > > > #define __rte_noreturn __attribute__((noreturn)) > > > > > > > > We should keep a macro in rte_common.h which triggers an explicit error > > > > > > i think that's relatively trivial to do. rte_common.h could after > > > toolchain specific include do a simple test. > > > > > > #ifndef __rte_no_return > > > #error no __rte_no_return defined for toolchain > > > #endif > > > > No I was thinking of: > > > > /** Doxygen comment for the attribute below */ > > #define __rte_no_return RTE_ATTR_NOT_SUPPORTED > > when you suggested this i thought it was something already established. > i see now that's not the case. would you mind elaborating a little with > a complete example of the toolchain specific override and the generic > include? i'd just like to understand completely what you were > proposing so i can try it out. Sorry I don't have time currently to elaborate, and not sure how to implement it. I may look at it next week if that's the way we want to go. > > This way we have a documentation in a single place for the macro, > > and compilation fails if it is not implemented for the toolchain.