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Tue, 6 Aug 2024 14:38:41 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id lsxzOnE1smbwXQAAD6G6ig (envelope-from ); Tue, 06 Aug 2024 14:38:41 +0000 Date: Tue, 6 Aug 2024 16:38:41 +0200 From: Filip Kastl To: gcc-patches@gcc.gnu.org Cc: jwakely@redhat.com, gerald@pfeifer.com Subject: [wwwdocs] gcc-15: Mention c++ header dependency changes () in porting_to.html Message-ID: MIME-Version: 1.0 Content-Disposition: inline X-Spam-Level: X-Rspamd-Action: no action X-Spam-Score: -2.21 X-Rspamd-Queue-Id: 020D321C41 X-Spamd-Result: default: False [-2.21 / 50.00]; BAYES_HAM(-3.00)[100.00%]; MIME_HTML_ONLY(1.20)[]; EXT_CSS(1.00)[]; NEURAL_HAM_LONG(-1.00)[-0.995]; R_DKIM_ALLOW(-0.20)[suse.cz:s=susede2_rsa,suse.cz:s=susede2_ed25519]; NEURAL_HAM_SHORT(-0.20)[-1.000]; MX_GOOD(-0.01)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; FROM_HAS_DN(0.00)[]; DKIM_SIGNED(0.00)[suse.cz:s=susede2_rsa,suse.cz:s=susede2_ed25519]; RBL_SPAMHAUS_BLOCKED_OPENRESOLVER(0.00)[2a07:de40:b281:104:10:150:64:97:from]; FUZZY_BLOCKED(0.00)[rspamd.com]; MIME_TRACE(0.00)[0:~]; ARC_NA(0.00)[]; RCVD_TLS_ALL(0.00)[]; RCPT_COUNT_THREE(0.00)[3]; SPAMHAUS_XBL(0.00)[2a07:de40:b281:104:10:150:64:97:from]; TO_DN_NONE(0.00)[]; RCVD_COUNT_TWO(0.00)[2]; FROM_EQ_ENVFROM(0.00)[]; DKIM_TRACE(0.00)[suse.cz:+]; MID_RHS_MATCH_FROMTLD(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; RECEIVED_SPAMHAUS_BLOCKED_OPENRESOLVER(0.00)[2a07:de40:b281:106:10:150:64:167:received]; MISSING_XM_UA(0.00)[]; DBL_BLOCKED_OPENRESOLVER(0.00)[suse.cz:dkim] X-Rspamd-Server: rspamd1.dmz-prg2.suse.org X-Spam-Status: No, score=-11.4 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, GIT_PATCH_0, KAM_SHORT, SPF_HELO_NONE, SPF_PASS, 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 Hi, I recently had to add '#include ' to a program to compile it with the latest trunk GCC due to https://gcc.gnu.org/pipermail/gcc-patches/2024-August/659176.html So I thought I might create the GCC 15 porting_to.html page and add an entry about this (I just copied the entry from GCC 14 porting_to.html). Ha! As I'm writing this I noticed that actually Jonathan predicted this and suggested a corresponding porting_to.html entry. Well, here it is :). Validated with the W3 Validator. Is this ok to be pushed? Cheers, Filip Kastl -- 8< -- --- htdocs/gcc-15/changes.html | 3 +- htdocs/gcc-15/porting_to.html | 53 +++++++++++++++++++++++++++++++++++ 2 files changed, 54 insertions(+), 2 deletions(-) create mode 100644 htdocs/gcc-15/porting_to.html diff --git a/htdocs/gcc-15/changes.html b/htdocs/gcc-15/changes.html index bfd98496..0d2c0aaf 100644 --- a/htdocs/gcc-15/changes.html +++ b/htdocs/gcc-15/changes.html @@ -17,9 +17,8 @@

This page is a "brief" summary of some of the huge number of improvements in GCC 15. -

diff --git a/htdocs/gcc-15/porting_to.html b/htdocs/gcc-15/porting_to.html new file mode 100644 index 00000000..43c3b302 --- /dev/null +++ b/htdocs/gcc-15/porting_to.html @@ -0,0 +1,53 @@ + + + + + +Porting to GCC 15 + + + + +

Porting to GCC 15

+ +

+The GCC 15 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 15. This document is an effort to identify common issues +and provide solutions. Let us know if you have suggestions for improvements! +

+ +

Note: GCC 15 has not been released yet, so this document is +a work-in-progress.

+ + + +

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 15: +

+
    +
  • <cstdint> + (for std::int8_t, std::int32_t etc.) +
    • +
+ + + + +