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Wed, 29 May 2024 10:40:26 -0700 (PDT) X-Google-Smtp-Source: AGHT+IE0lMU0si2gvatYNfDBOgkM4z0TMU6/HI2mlE+BNxJ7jKEdY831Pucf9I8VNxoc6eulcUfpJZJCZnfJBaTADf4= X-Received: by 2002:a05:6e02:2164:b0:36c:c9f:ccd0 with SMTP id e9e14a558f8ab-3737b28870dmr182229155ab.17.1717004425680; Wed, 29 May 2024 10:40:25 -0700 (PDT) MIME-Version: 1.0 References: <00dc6e30-2e12-4b29-951b-d600097b38d0@gmail.com> <80bf1a5a-63a3-4da4-8721-88c760243add@cs.ucla.edu> <878qzv1r13.fsf@oldenburg.str.redhat.com> <3e852f76-9508-4c2e-bef3-7af8a10b626e@cs.ucla.edu> <25aee7da-bdd5-4a2a-b6ac-fa1a4aa11cc7@cs.ucla.edu> <6c8175d0-a1ba-438f-9f45-57a73790a1d6@cs.ucla.edu> <878qzsset6.fsf@tromey.com> In-Reply-To: <878qzsset6.fsf@tromey.com> From: Jason Merrill Date: Wed, 29 May 2024 13:40:14 -0400 Message-ID: Subject: Re: configure adds -std=gnu++11 to CXX variable To: Tom Tromey Cc: Paul Eggert , Jakub Jelinek , Jonathan Wakely , Florian Weimer , Peter Johansson , Zack Weinberg , Autoconf , "gcc@gcc.gnu.org" X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Spam-Status: No, score=-5.8 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE,RCVD_IN_MSPIKE_H4,RCVD_IN_MSPIKE_WL,SPF_HELO_NONE,SPF_NONE,TXREP,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org List-Id: On Wed, May 29, 2024 at 1:34=E2=80=AFPM Tom Tromey wrote: > >>>>> "Jason" =3D=3D Jason Merrill writes: > > Jason> Thanks, though I don't think all that code needs to go; > Jason> AC_PROG_CXX_STDCXX_EDITION_TRY still looks useful for a project th= at > Jason> relies on features from a particular standard. We just don't want > Jason> AC_PROG_CXX to invoke it. > > I didn't read the macro but there's also config/ax_cxx_compile_stdcxx.m4. > gdb uses this to make sure C++17 is available. Good point, that's what GCC uses as well. Jason