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DIR:OUT; SFP:1101; X-OriginatorOrg: arm.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 20 Aug 2020 15:26:15.3657 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 44f6d33a-b56c-46d0-8e0a-08d8451d60e8 X-MS-Exchange-CrossTenant-Id: f34e5979-57d9-4aaa-ad4d-b122a662184d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=f34e5979-57d9-4aaa-ad4d-b122a662184d; Ip=[63.35.35.123]; Helo=[64aa7808-outbound-1.mta.getcheckrecipient.com] X-MS-Exchange-CrossTenant-AuthSource: VE1EUR03FT033.eop-EUR03.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: AM5PR0801MB2084 X-Spam-Status: No, score=-9.7 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, MSGID_FROM_MTA_HEADER, RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H2, SPF_HELO_PASS, SPF_PASS, TXREP, UNPARSEABLE_RELAY autolearn=ham autolearn_force=no version=3.4.2 X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on server2.sourceware.org X-BeenThere: gcc-patches@gcc.gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gcc-patches mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 20 Aug 2020 15:26:20 -0000 The 08/20/2020 13:59, Vasee Vinayagamoorthy wrote: > +# Also require C++11 for building code generation tools. > +# Do nothing if "${build}" = "${host}", because in this case > +# CXX_FOR_BUILD="\$(CXX)", and $CXX is already set to the correct value above. > +if test "${build}" != "${host}"; then > + saved_CXX=$CXX > + saved_CXXCPP=$CXXCPP > + CXX=$CXX_FOR_BUILD > + CXXCPP= > + AX_CXX_COMPILE_STDCXX(11) > + CXX="$CXX -std=c++11" > + CXX_FOR_BUILD=$CXX > + CXX=$saved_CXX > + CXXCPP=$saved_CXXCPP > +fi i think AX_CXX_COMPILE_STDCXX(11) should set CXX correctly (it seems it would set it to "g++ -std=gnu++11" instead of "g++ -std=c++11" but either should work) please look at the top level config.log i think you should look for "checking whether g++ supports C++11 features with -std=gnu++11" and that check should be successful.