From owner-freebsd-bugs@freebsd.org Fri Jan 8 23:15:32 2016 Return-Path: Delivered-To: freebsd-bugs@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 3237FA6715D for ; Fri, 8 Jan 2016 23:15:32 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2001:1900:2254:206a::16:76]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 234951D65 for ; Fri, 8 Jan 2016 23:15:32 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from bugs.freebsd.org ([127.0.1.118]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id u08NFWVL024498 for ; Fri, 8 Jan 2016 23:15:32 GMT (envelope-from bugzilla-noreply@freebsd.org) From: bugzilla-noreply@freebsd.org To: freebsd-bugs@FreeBSD.org Subject: [Bug 205787] Can't compile freebsd srcs (/usr/src) with clang/llvm 3.8 and option -march=haswell Date: Fri, 08 Jan 2016 23:15:32 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: bin X-Bugzilla-Version: 10.2-RELEASE X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Only Me X-Bugzilla-Who: dim@FreeBSD.org X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: freebsd-bugs@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 08 Jan 2016 23:15:32 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D205787 --- Comment #4 from Dimitry Andric --- Without any further information, I'm guessing that your bsd.compiler.mk does not detect the compiler version properly, and that incorrect flags are being used to compile boot2. (The whole sys/boot area is very sensitive to the e= xact optimization flags, it will almost always grow too large if they aren't correct.) Can you provide a log of the commands being used to compile everything under /usr/src/sys/boot? For example, by running "make clean" in there, and then running make as usual, but redirected to a log file. I'm also interested in the COMPILER_TYPE and COMPILER_VERSION detected by y= our version of the build system. E.g. in /usr/src, run: make -V COMPILER_TYPE -V COMPILER_VERSION and paste the output here. Having said all that, I think you will run into multiple problems that will= be pretty tricky to solve, if you continue this way. 10.2-RELEASE is complete= ly frozen, and misses a lot of important fixes and updates which are in 10-STA= BLE, making the task even more difficult. Therefore, I think it is wisest to abandon this attempt. You will most lik= ely not gain any significant performance advantage by compiling with -march=3Dhaswell, as opposed to e.g. -march=3Dcorei7. --=20 You are receiving this mail because: You are the assignee for the bug.=