From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 7197 invoked by alias); 24 Jan 2011 23:38:15 -0000 Received: (qmail 7109 invoked by uid 22791); 24 Jan 2011 23:38:14 -0000 X-SWARE-Spam-Status: No, hits=-2.9 required=5.0 tests=ALL_TRUSTED,AWL,BAYES_00 X-Spam-Check-By: sourceware.org Received: from localhost (HELO gcc.gnu.org) (127.0.0.1) by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Mon, 24 Jan 2011 23:38:10 +0000 From: "joseph at codesourcery dot com" To: gcc-bugs@gcc.gnu.org Subject: [Bug driver/47390] [4.6 Regression] Linking with -export-dynamic broken X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: driver X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: joseph at codesourcery dot com X-Bugzilla-Status: NEW X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: 4.6.0 X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated Content-Type: text/plain; charset="UTF-8" MIME-Version: 1.0 Date: Mon, 24 Jan 2011 23:50:00 -0000 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: 2011-01/txt/msg02553.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47390 --- Comment #2 from joseph at codesourcery dot com 2011-01-24 23:37:39 UTC --- On Fri, 21 Jan 2011, rguenth at gcc dot gnu.org wrote: > Joseph - 4.5 handled -export-dynamic by passing it through to the linker > (not exactly sure why). Can we restore this behavior to avoid regressions? > If not, can we diagnose this invalid option then? It seems to be passed > as -e xport-dynamic to the linker now, resulting in an undefined symbol > for me with a trivial hello-world. -export-dynamic was passed down by an accident of %{e*} in LINK_COMMAND_SPEC. If you want this to continue to work then add export-dynamic Driver to common.opt, and probably put a comment on LINK_COMMAND_SPEC saying that %{e*} deliberately covers -export-dynamic. (Alternatively, I think using %{export-dynamic} %{e}, together with the common.opt change, will make the passed options explicit, and successfully pass to the linker (in separate argument form) -e options passed to the driver in either joined or separate form - but verify this before making that change.)