From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by sourceware.org (Postfix) with ESMTPS id CC7783858281 for ; Tue, 19 Jul 2022 14:14:22 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org CC7783858281 Received: from mail-ej1-f71.google.com (mail-ej1-f71.google.com [209.85.218.71]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-382-uyd2ujGzPOKk8bOgkA-y3w-1; Tue, 19 Jul 2022 10:14:21 -0400 X-MC-Unique: uyd2ujGzPOKk8bOgkA-y3w-1 Received: by mail-ej1-f71.google.com with SMTP id sg42-20020a170907a42a00b0072e3fc6cdd1so3072189ejc.13 for ; Tue, 19 Jul 2022 07:14:20 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=z9d3uSP41BqZDE4081LIms7+irAcnRG6GxBP/0RMPs4=; b=13EwZbGs+3g52TOeoN9XSrm6N8Ec2REn1462aV8C5+TF5uLAa7QlRghDVyaOEfpRBV wBTiQy+Xn8VTD8RCopJ9ME8daW0vqSOCzHDHlNE3U1/XeViQe9yKJu0PZzo4OjwTsWu/ bK9VZghPGlEV9/argYcUtosELPdiveYEXwth5VS76ESwYNVHjQ9gJWavoZwEKcel04U7 keZYpapRxatswNovO6LXEVfAOtNi6zlfPfoXguVRwJtcING+IOfUvoIPAN96P+8IWLY3 2uHy/Y68oUTA2obyfKeOd5M5J1+33f+v18OshaXB2lYTN3KKzvkkzbHWxfi3QK0IzGDT 7fYw== X-Gm-Message-State: AJIora+tf9o0g3RKsDuVDMwyYjj/iX5bT4IfxVgYAQzSBZk3UMokcyeK AnEZIxIhn9fn2jDvZXZbmWPkV6Qxl6O9/keqIz0iqI7mjoxYJmGvsPE+oJFP/XbGLx8z0H5JwjU kj7VfAQvzGfcs65aX54Drn7eFfFFHEqU= X-Received: by 2002:a17:907:2d12:b0:72b:67fb:89a5 with SMTP id gs18-20020a1709072d1200b0072b67fb89a5mr29642856ejc.507.1658240059965; Tue, 19 Jul 2022 07:14:19 -0700 (PDT) X-Google-Smtp-Source: AGRyM1sYG3p2NW9Po+czZBQRs8QhWLduXYYnw+h3FmMGTPo3jP5aezSZhV0Hh4KdJ343/06OjwbQy1JHZSMoG1nab4M= X-Received: by 2002:a17:907:2d12:b0:72b:67fb:89a5 with SMTP id gs18-20020a1709072d1200b0072b67fb89a5mr29642844ejc.507.1658240059712; Tue, 19 Jul 2022 07:14:19 -0700 (PDT) MIME-Version: 1.0 References: <20220708174133.2462418-1-polacek@redhat.com> <7955e63f-c20e-482c-cea3-db0942ed0149@redhat.com> <16983f2a-f56a-1462-c2db-3e4bc6fa6ad7@redhat.com> <93e09683-22c9-9e13-9ae1-13c4b447f38f@redhat.com> In-Reply-To: From: Jonathan Wakely Date: Tue, 19 Jul 2022 15:14:07 +0100 Message-ID: Subject: Re: [PATCH] c++: Add __reference_con{struc, ver}ts_from_temporary [PR104477] To: Stephan Bergmann Cc: Marek Polacek , "libstdc++" , GCC Patches X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset="UTF-8" X-Spam-Status: No, score=-6.8 required=5.0 tests=BAYES_00, DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, RCVD_IN_DNSWL_NONE, SPF_HELO_NONE, SPF_NONE, TXREP autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org X-BeenThere: libstdc++@gcc.gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Libstdc++ mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 19 Jul 2022 14:14:24 -0000 On Tue, 19 Jul 2022 at 12:10, Jonathan Wakely wrote: > > On Tue, 19 Jul 2022 at 11:08, Jonathan Wakely wrote: > > > > On Sun, 17 Jul 2022 at 22:13, Stephan Bergmann via Libstdc++ > > wrote: > > > > > > On 7/15/22 22:25, Marek Polacek via Gcc-patches wrote: > > > > Yeah, I guess so. But I've already pushed the patch. > > > > > > This commit obviously breaks using libstdc++ with Clang (in -std=c++2b > > > mode), which doesn't implement those new builtins. Something like the > > > below would fix that, > > > > Thanks, Stephan, I'll fix this. > > This patch doesn't work, because __has_builtin doesn't detect the new > built-ins. I have a patch that solves that, so we can make the change > to the library headers. Should be fixed now, thanks for reporting it.