From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id 2E6DE39960EA; Wed, 3 Feb 2021 14:30:43 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 2E6DE39960EA From: "nathan at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug driver/98943] [11 Regression] gcc driver does not fail on unknown files: tricks configure scripts to recognize /W4 and -diag-disable 1,2,3,4 options Date: Wed, 03 Feb 2021 14:30:42 +0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: driver X-Bugzilla-Version: 11.0 X-Bugzilla-Keywords: needs-bisection X-Bugzilla-Severity: normal X-Bugzilla-Who: nathan at gcc dot gnu.org X-Bugzilla-Status: ASSIGNED X-Bugzilla-Resolution: X-Bugzilla-Priority: P1 X-Bugzilla-Assigned-To: nathan at gcc dot gnu.org X-Bugzilla-Target-Milestone: 11.0 X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: attachments.created 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: Wed, 03 Feb 2021 14:30:43 -0000 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D98943 --- Comment #5 from Nathan Sidwell --- Created attachment 50119 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=3D50119&action=3Dedit proposed direction Here's a test patch. As Jakub points out, we pass -d$ANYTHING to the compi= ler, it is the following 123,456 that is considered a file to pass to the linker= .=20 It's fun trying to find a -OPTION that the driver doesn't pass to the linker and doesn't already reject. '-n' is one. a) Reject any filename that is -STUFF (allow plain '-') b) Reject any absolute path that is not accessible c) When ignoring linker files, error if they are inaccessible. If there are funky ways of spelling a member of an archive, why are you trying to pass t= hem when not linking (i.e. you're doing something specialized, do it in the ri= ght place) devvm1702:116>./xg++ -B./ -diag 123,44 -x c -c /dev/null cc1: warning: unrecognized gcc debugging option: i cc1: warning: unrecognized gcc debugging option: g xg++: error: 123,44: unreadable linker input file file unused because linki= ng is not done: No such file or directory devvm1702:120>./xg++ -B./ -nart bob.c=20 xg++: error: unrecognized command-line option '-nart' though I notice: devvm1702:121>./xg++ -B./ -nope bob.c=20 xg++: error: unrecognized command-line option '-nope'; did you mean '-no-pi= e'? perhaps that check should apply to all - options, and not just near misses?=