From patchwork Wed Nov 20 01:36:06 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Joseph Myers X-Patchwork-Id: 1197718 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=gcc.gnu.org (client-ip=209.132.180.131; helo=sourceware.org; envelope-from=gcc-patches-return-514092-incoming=patchwork.ozlabs.org@gcc.gnu.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=codesourcery.com Authentication-Results: ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=gcc.gnu.org header.i=@gcc.gnu.org header.b="DGjBNya2"; dkim-atps=neutral Received: from sourceware.org (server1.sourceware.org [209.132.180.131]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 47Hlf068Yhz9sPW for ; Wed, 20 Nov 2019 12:36:22 +1100 (AEDT) DomainKey-Signature: a=rsa-sha1; c=nofws; d=gcc.gnu.org; h=list-id :list-unsubscribe:list-archive:list-post:list-help:sender:date :from:to:subject:message-id:mime-version:content-type; q=dns; s= default; b=bxpr9cCQRI/CAY/msaCGq9nEvOQJBkyf3S1ylRr1bAhueA+ioClqy F7FvLZAIM2bwjZuY3E0ir19N6WESTntdGYkRX8qPdOizQoo5X2R8tHlcXzQX5ggU Q7zqohJDTvjCKQq0KP0rZRjvxmgAffScuQ+VvGpWR7g11D/eKtaR/E= DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=gcc.gnu.org; h=list-id :list-unsubscribe:list-archive:list-post:list-help:sender:date :from:to:subject:message-id:mime-version:content-type; s= default; bh=sCL6AaC/rTbSXLHdZal/oaBSH5I=; b=DGjBNya2XwZKVa9wgqHz BZeQyetx/BIOUiFUNtEwyGY6boOfB0Qw6K1ImEpUsQWo2O1C4xbnh/hr7i+ZvElj cobJnhwmI44CBf6NVoSW5f7PjhDyxprwbKzChoQM/xp0de+tSYlMITW5Vos5bOg1 6jx8u+4v+2JPBkV1oGafPw8= Received: (qmail 46785 invoked by alias); 20 Nov 2019 01:36:15 -0000 Mailing-List: contact gcc-patches-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Id: List-Unsubscribe: List-Archive: List-Post: List-Help: Sender: gcc-patches-owner@gcc.gnu.org Delivered-To: mailing list gcc-patches@gcc.gnu.org Received: (qmail 46773 invoked by uid 89); 20 Nov 2019 01:36:14 -0000 Authentication-Results: sourceware.org; auth=none X-Spam-SWARE-Status: No, score=-14.9 required=5.0 tests=AWL, BAYES_00, GIT_PATCH_0, GIT_PATCH_1, GIT_PATCH_2, GIT_PATCH_3, KAM_NUMSUBJECT, SPF_PASS autolearn=ham version=3.3.1 spammy= X-HELO: esa4.mentor.iphmx.com Received: from esa4.mentor.iphmx.com (HELO esa4.mentor.iphmx.com) (68.232.137.252) by sourceware.org (qpsmtpd/0.93/v0.84-503-g423c35a) with ESMTP; Wed, 20 Nov 2019 01:36:13 +0000 IronPort-SDR: 7M/Kmbva8jEBAWYlzcmnOY7Z+UwxVRnsF3Nzm0P/CX68xAytn+YB0Uy6BAhkqAI2kQTdkVasqu XElWSqW0XDc0BnaKGSKk5EBwyQw8imL4eOznkHEMUiKjHKWLd+xJPazGgmGL5X18fKHUrh+OKW Z4zM6RqkV0gI1Suu1ICPXL1ve2sLdfojrgLUVIvo/Z2L1eXujZZCLg6GU1nyyRrxzxfu2CvDfg 0CUmRWA9aqkwPqJ8c3taENlX57wiZn7S8IOhy2RX6GIiKjriPafqcuEgb9SlznLNCTaX8GpTWB Y5M= Received: from orw-gwy-01-in.mentorg.com ([192.94.38.165]) by esa4.mentor.iphmx.com with ESMTP; 19 Nov 2019 17:36:11 -0800 IronPort-SDR: h+byCT2xydq+ZAUWm+oviAAhYEGiPUrSQZxr9InVsCl1tVm6J816gNtVplYc07M9kx2P81Akw5 +TfBedZmQU+Hk5gS7uOYoB/b7JYKHhGN7a+EeCbVjU3/bU4+B3Nm/ZiEEs0G4IYJDTTJSsIMrF St0BFew+iSk3pbKTfojdVjXY4TqIW6drT/+CKtveh4a5Wb48wBFtgG9RFcF5rwDVF5y1QIRgRH Wp8KDtQYWmMwqXfYfMM3oAGxdKeGKtEQggSGd6NpoS12o/p+ePkFLhEu0rHq1ScqehAIFl+O4N g2s= Date: Wed, 20 Nov 2019 01:36:06 +0000 From: Joseph Myers To: Subject: Add release notes for new C2X features in GCC 10 Message-ID: User-Agent: Alpine 2.21 (DEB 202 2017-01-01) MIME-Version: 1.0 I've committed this patch to add release notes for new C2X features in GCC 10. diff --git a/htdocs/gcc-10/changes.html b/htdocs/gcc-10/changes.html index 1e9c3f8d..52eb303c 100644 --- a/htdocs/gcc-10/changes.html +++ b/htdocs/gcc-10/changes.html @@ -63,6 +63,44 @@ a work-in-progress.

+

C

+
    +
  • Several new features from the upcoming C2X revision of the ISO C + standard are supported with -std=c2x + and -std=gnu2x. Some of these features are also + supported as extensions when compiling for older language versions. + In addition to the features listed, some features previously + supported as extensions and now added to the C standard are enabled + by default in C2X mode and not diagnosed with -std=c2x + -Wpedantic. +
      +
    • The [[]] attribute syntax is supported, as in + C++. Existing attributes can be used with this syntax in forms + such as [[gnu::const]]. The standard + attributes [[deprecated]], [[fallthrough]] + and [[maybe_unused]] are supported.
      • +
    • UTF-8 character constants using the u8'' syntax + are supported.
      • +
    • <float.h> defines + macros FLT_NORM_MAX, DBL_NORM_MAX + and LDBL_NORM_MAX.
      • +
    • When decimal floating-point arithmetic is + supported, <float.h> defines + macros DEC32_TRUE_MIN, DEC64_TRUE_MIN + and DEC128_TRUE_MIN, in addition to the macros that + were previously only defined if __STDC_WANT_DEC_FP__ + was defined before including <float.h>.
      • +
    • In C2X mode, empty parentheses in a function definition give + that function a type with a prototype for subsequent calls; other + old-style function definitions are diagnosed by default in C2X + mode.
      • +
    • The strftime format checking supports + the %OB and %Ob formats.
      • +
    • In C2X mode, -fno-fp-int-builtin-inexact is + enabled by default.
      • +
    • +
+

C++

  • Several C++20 features have been implemented: