From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 23425 invoked by alias); 29 Nov 2011 14:57:03 -0000 Received: (qmail 23415 invoked by uid 22791); 29 Nov 2011 14:57:03 -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; Tue, 29 Nov 2011 14:56:46 +0000 From: "dx_zhou at hotmail dot com" To: gcc-bugs@gcc.gnu.org Subject: [Bug preprocessor/51341] make cannot detect head file change by dependency file with gcc 4.6.1 on ubuntu 11.10 Date: Tue, 29 Nov 2011 15:39:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: preprocessor X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: dx_zhou at hotmail dot com X-Bugzilla-Status: RESOLVED X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: --- 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 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: 2011-11/txt/msg02781.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51341 --- Comment #3 from davidz 2011-11-29 14:56:41 UTC --- I am a little confused. -MT will create .d file. Then make command will include .d and re-compile if dependency file changes. The issue is that g++ 4.6.1 doesn't re-compile if I touch .h. Does this mean my test.d format is wrong? If I need another -MT, what syntax it should be? Thanks a lot! (In reply to comment #2) > This was an expected change, see > http://gcc.gnu.org/bugzilla/show_bug.cgi?id=12448 . Which says you need > another -MT option to include the .o target.