From owner-freebsd-toolchain@freebsd.org Thu Jun 29 17:33:12 2017 Return-Path: Delivered-To: freebsd-toolchain@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 488C8DA1C42 for ; Thu, 29 Jun 2017 17:33:12 +0000 (UTC) (envelope-from markmi@dsl-only.net) Received: from asp.reflexion.net (outbound-mail-210-15.reflexion.net [208.70.210.15]) (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 E3C9267DD0 for ; Thu, 29 Jun 2017 17:33:11 +0000 (UTC) (envelope-from markmi@dsl-only.net) Received: (qmail 2826 invoked from network); 29 Jun 2017 17:34:40 -0000 Received: from unknown (HELO mail-cs-02.app.dca.reflexion.local) (10.81.19.2) by 0 (rfx-qmail) with SMTP; 29 Jun 2017 17:34:40 -0000 Received: by mail-cs-02.app.dca.reflexion.local (Reflexion email security v8.40.1) with SMTP; Thu, 29 Jun 2017 13:33:10 -0400 (EDT) Received: (qmail 3134 invoked from network); 29 Jun 2017 17:33:10 -0000 Received: from unknown (HELO iron2.pdx.net) (69.64.224.71) by 0 (rfx-qmail) with (AES256-SHA encrypted) SMTP; 29 Jun 2017 17:33:10 -0000 Received: from [192.168.1.114] (c-76-115-7-162.hsd1.or.comcast.net [76.115.7.162]) by iron2.pdx.net (Postfix) with ESMTPSA id 6D0D0EC7E56; Thu, 29 Jun 2017 10:33:09 -0700 (PDT) Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 10.3 \(3273\)) Subject: Re: head -r320458 (e.g.) amd64 -> powerpc (32-bit) cross-buildworld fails for time libc++ static_asserts and overflow/underflow of long long (system clang/clang++ 4 based build) From: Mark Millard In-Reply-To: <55A1694D-BC40-49AE-BEF7-CEE502126E96@FreeBSD.org> Date: Thu, 29 Jun 2017 10:33:09 -0700 Cc: Justin Hibbits , FreeBSD Toolchain , FreeBSD PowerPC ML , FreeBSD Current Content-Transfer-Encoding: quoted-printable Message-Id: References: <5B12D9A6-C9A2-4B0D-B32D-D04D7DB1E3BC@dsl-only.net> <55A1694D-BC40-49AE-BEF7-CEE502126E96@FreeBSD.org> To: Dimitry Andric X-Mailer: Apple Mail (2.3273) X-BeenThere: freebsd-toolchain@freebsd.org X-Mailman-Version: 2.1.23 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, 29 Jun 2017 17:33:12 -0000 [Good news from the llvm side of things. . .] On 2017-Jun-29, at 3:47 AM, Dimitry Andric wrote: > On 29 Jun 2017, at 12:04, Mark Millard wrote: >>=20 >> [The libc++ code in question appears to not be ready for >> 32-bit contexts with 64 bit times. Disable >> experimental/filesystem for now? I've submitted >> llvm bugzilla 33638 for the issue and have >> added it to llvm's 25780, the FreeBSD META for >> clang.] >=20 > Yes, this also broke earlier on arm and mips, which is why there is = the > following in lib/Makefile: >=20 > .if ${MACHINE_CPUARCH} !=3D "arm" && ${MACHINE_CPUARCH} !=3D "mips" > _libcplusplus+=3D libc++experimental > .endif >=20 > I haven't yet found the time to address this issue. Upstream should > already be aware of it, though. >=20 > One nasty problem with this is that it is not possible to figure out = at > compile time what the size of time_t is. You always need some sort of > configure-time test, and an external define. I got a notice of a pending patch for the issue: Begin forwarded message: From: bugzilla-daemon at llvm.org Subject: [Bug 33638] FreeBSD head -r320347 moved TARGET_ARCH=3Dpowerpc = to 64-bit time_t but now experimental/filesystem/operations.cpp fails = static_asserts and such Date: June 29, 2017 at 10:23:56 AM PDT . . . Comment # 2 on bug 33638 from Eric Fiselier I have a patch for this waiting in the wings. I should be able to get to = it next week =3D=3D=3D Mark Millard markmi at dsl-only.net