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Mon, 30 Oct 2023 11:10:31 -0400 X-MC-Unique: gy6acgrYNzyDEbjMxx7TZg-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.rdu2.redhat.com [10.11.54.4]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 6CC6C3810D27; Mon, 30 Oct 2023 15:10:31 +0000 (UTC) Received: from localhost (unknown [10.42.28.144]) by smtp.corp.redhat.com (Postfix) with ESMTP id 371792026D4C; Mon, 30 Oct 2023 15:10:31 +0000 (UTC) From: Jonathan Wakely To: gcc-patches@gcc.gnu.org, libstdc++@gcc.gnu.org Subject: [committed][wwwdocs] Add "Porting to GCC 14" Date: Mon, 30 Oct 2023 15:10:13 +0000 Message-ID: <20231030151030.47170-1-jwakely@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.4 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com X-Spam-Status: No, score=-12.3 required=5.0 tests=BAYES_00, DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, GIT_PATCH_0, KAM_SHORT, RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H4, RCVD_IN_MSPIKE_WL, 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: gcc-patches@gcc.gnu.org X-Mailman-Version: 2.1.30 Precedence: list List-Id: Gcc-patches mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: gcc-patches-bounces+incoming=patchwork.ozlabs.org@gcc.gnu.org Pushed to wwwdocs. -- >8 -- --- htdocs/gcc-14/porting_to.html | 50 +++++++++++++++++++++++++++++++++++ 1 file changed, 50 insertions(+) create mode 100644 htdocs/gcc-14/porting_to.html diff --git a/htdocs/gcc-14/porting_to.html b/htdocs/gcc-14/porting_to.html new file mode 100644 index 00000000..dea9ac80 --- /dev/null +++ b/htdocs/gcc-14/porting_to.html @@ -0,0 +1,50 @@ + + + + + +Porting to GCC 14 + + + + +

Porting to GCC 14

+ +

+The GCC 14 release series differs from previous GCC releases in +a number of ways. Some of these are a result +of bug fixing, and some old behaviors have been intentionally changed +to support new standards, or relaxed in standards-conforming ways to +facilitate compilation or run-time performance. +

+ +

+Some of these changes are user visible and can cause grief when +porting to GCC 14. This document is an effort to identify common issues +and provide solutions. Let us know if you have suggestions for improvements! +

+ +

C++ language issues

+ +

Header dependency changes

+

Some C++ Standard Library headers have been changed to no longer include +other headers that were being used internally by the library. +As such, C++ programs that used standard library components without +including the right headers will no longer compile. +

+

+The following headers are used less widely in libstdc++ and may need to +be included explicitly when compiling with GCC 14: +

+
    +
  • <algorithm> + (for std::copy_n, std::lower_bound, + std::remove, std::reverse, + std::sort etc.) +
    • +
+ + + + +