From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 19153 invoked by alias); 28 Apr 2009 20:57:47 -0000 Received: (qmail 18921 invoked by uid 48); 28 Apr 2009 20:57:36 -0000 Date: Tue, 28 Apr 2009 20:57:00 -0000 Message-ID: <20090428205736.18920.qmail@sourceware.org> X-Bugzilla-Reason: CC References: Subject: [Bug libstdc++/39491] [4.2/4.3 regression] symbol __signbitl@GLIBCXX_3.4 in libstdc++ exported In-Reply-To: Reply-To: gcc-bugzilla@gcc.gnu.org To: gcc-bugs@gcc.gnu.org From: "carlos at codesourcery dot com" Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Id: List-Archive: List-Post: List-Help: Sender: gcc-bugs-owner@gcc.gnu.org X-SW-Source: 2009-04/txt/msg02767.txt.bz2 ------- Comment #28 from carlos at codesourcery dot com 2009-04-28 20:57 ------- Exporting a non-default versioned symbol is useless since new programs won't be able to link against that definition. Did 4.2/4.3 export a global default symbol for __signbitl? If we did export a global default symbol for __signbitl then we must continue to export it. The current glibc math.h signbit macro will evaluate to __signbitl if passed a long dobule type, and therefore correct programs using the signbit macro may have ended up referencing __signbitl from libstdc++. Please comment. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39491