From owner-freebsd-toolchain@FreeBSD.ORG Thu Dec 30 18:44:45 2010 Return-Path: Delivered-To: freebsd-toolchain@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 382941065679; Thu, 30 Dec 2010 18:44:45 +0000 (UTC) (envelope-from rdivacky@vlk.vlakno.cz) Received: from vlakno.cz (lev.vlakno.cz [77.93.215.190]) by mx1.freebsd.org (Postfix) with ESMTP id E81F38FC17; Thu, 30 Dec 2010 18:44:44 +0000 (UTC) Received: from lev.vlakno.cz (localhost [127.0.0.1]) by vlakno.cz (Postfix) with ESMTP id D632F9CB0FB; Thu, 30 Dec 2010 19:44:42 +0100 (CET) X-Virus-Scanned: amavisd-new at vlakno.cz Received: from vlakno.cz ([127.0.0.1]) by lev.vlakno.cz (lev.vlakno.cz [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id CNpA-z0Szhyk; Thu, 30 Dec 2010 19:44:42 +0100 (CET) Received: from vlk.vlakno.cz (localhost [127.0.0.1]) by vlakno.cz (Postfix) with ESMTP id 427849CB167; Thu, 30 Dec 2010 19:44:42 +0100 (CET) Received: (from rdivacky@localhost) by vlk.vlakno.cz (8.14.4/8.14.4/Submit) id oBUIigYv079933; Thu, 30 Dec 2010 19:44:42 +0100 (CET) (envelope-from rdivacky) Date: Thu, 30 Dec 2010 19:44:42 +0100 From: Roman Divacky To: Alexander Best Message-ID: <20101230184442.GA79735@freebsd.org> References: <20101227213559.GA53178@freebsd.org> <20101228142203.GA69674@freebsd.org> <20101230002033.GA23583@freebsd.org> <20101230081445.GA99446@freebsd.org> <20101230184048.GA34628@freebsd.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20101230184048.GA34628@freebsd.org> User-Agent: Mutt/1.4.2.3i Cc: freebsd-toolchain@freebsd.org Subject: Re: issue with clang and CPUTYPE native X-BeenThere: freebsd-toolchain@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Maintenance of FreeBSD's integrated toolchain List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 30 Dec 2010 18:44:45 -0000 On Thu, Dec 30, 2010 at 06:40:48PM +0000, Alexander Best wrote: > On Thu Dec 30 10, Roman Divacky wrote: > > On Thu, Dec 30, 2010 at 12:20:33AM +0000, Alexander Best wrote: > > > On Tue Dec 28 10, Roman Divacky wrote: > > > > -march=native in clang works by detecting CPU name > > > > and passing it (if found) to llvm. if the CPU is not > > > > detected nothing is passed. > > > > > > > > nocona is supported > > > > > > > > ie. leaving the CPUNAME empty or specifying it to "nocona" should > > > > be equivalent to setting it to "native". > > > > > > > > > > > > can you apply this patch: > > > > > > > > Index: Driver/Tools.cpp > > > > =================================================================== > > > > --- Driver/Tools.cpp (revision 122591) > > > > +++ Driver/Tools.cpp (working copy) > > > > @@ -684,6 +684,7 @@ > > > > // FIXME: We should also incorporate the detected target features for use > > > > // with -native. > > > > std::string CPU = llvm::sys::getHostCPUName(); > > > > + llvm::outs() << "detected CPU = " << CPU << "\n"; > > > > if (!CPU.empty()) > > > > CPUName = Args.MakeArgString(CPU); > > > > } else > > > > > > thanks a lot for the patch. i've applied it, but am not sure how to only > > > compile clang. 'make' in usr.bin/clang fails. do i have to run target > > > buildworld or is there a way to only build clang? > > > > I would guess that cd lib/clang && make && cd ../../usr.bin/clang && make > > should work, if not - full buildworld is necessary I guess > > thanks. that worked. this is what clang detects as my cpu: > > -march=native hm? are you sure it wrote -march=native? it should have written "detected CPU = something"