From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id AA29B3861038; Tue, 25 May 2021 17:18:29 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org AA29B3861038 From: "redi at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug c++/100731] [11/12 Regression] GCC 11 fails to build using GCC 4.8 because of missing includes Date: Tue, 25 May 2021 17:18:29 +0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: c++ X-Bugzilla-Version: 11.1.0 X-Bugzilla-Keywords: build X-Bugzilla-Severity: normal X-Bugzilla-Who: redi at gcc dot gnu.org X-Bugzilla-Status: UNCONFIRMED X-Bugzilla-Resolution: X-Bugzilla-Priority: P2 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: 11.2 X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: gcc-bugs@gcc.gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gcc-bugs mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 25 May 2021 17:18:29 -0000 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D100731 --- Comment #9 from Jonathan Wakely --- r230324 changed the dependency for std::to_string from _GLIBCXX_USE_C99 to _GLIBCXX_USE_C99_STDIO, which means it's enabled for more targets (you don't need the full C99 math library, for example!) That change is present in GCC= 6. And r272186 removed the _GLIBCXX_C99_STDIO dependency for std::to_string, so it's always defined now. That's in GCC 10.=