From owner-freebsd-ppc@freebsd.org Tue Dec 5 20:48:31 2017 Return-Path: Delivered-To: freebsd-ppc@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 EF35EE80F51; Tue, 5 Dec 2017 20:48:31 +0000 (UTC) (envelope-from rdivacky@vlakno.cz) Received: from vlakno.cz (mail.vlakno.cz [91.217.96.224]) by mx1.freebsd.org (Postfix) with ESMTP id 73AF36EA26; Tue, 5 Dec 2017 20:48:30 +0000 (UTC) (envelope-from rdivacky@vlakno.cz) Received: by vlakno.cz (Postfix, from userid 1002) id 63A2546D20F; Tue, 5 Dec 2017 21:39:32 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=vlakno.cz; s=mail; t=1512506372; bh=/wBElwnwyoB0baxRBjwecbDB5fVvTJBjEkNj+UHz40A=; h=Date:From:To:Cc:Subject:References:In-Reply-To; b=FgnMbabsdwfdUhLYuRI3HG4f9H7Iv2AzuHrfiDYTS8Gnvp7NDUA9wgh7MTl4Zg0AC qTAVm0C59cKcGE5lhaJMZZOeOYAwsqHgAKNMtTkuAXBYpBy7qhFoM4o/u1iAe0j75j ag6Nrrh9fUvL1eR7Z7gmYCbo4wPjccFA1Talgsdk= Date: Tue, 5 Dec 2017 21:39:32 +0100 From: Roman Divacky To: Mark Millard Cc: FreeBSD Toolchain , FreeBSD PowerPC ML , FreeBSD Ports Subject: Re: 32-bit powerpc system-clang based builds of devel/llvm40 and devel/llvm50: fails via "Host compiler appears to require libatomic, but cannot find it" Message-ID: <20171205203932.GA53800@vlakno.cz> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.9.1 (2017-09-22) X-BeenThere: freebsd-ppc@freebsd.org X-Mailman-Version: 2.1.25 Precedence: list List-Id: Porting FreeBSD to the PowerPC List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 05 Dec 2017 20:48:32 -0000 The cmake test just tries to compile: #include std::atomic x; int main() { return x; } What happens if you try to compile this small code with your host compiler? Roman On Tue, Dec 05, 2017 at 10:42:49AM -0800, Mark Millard wrote: > [I experiment with system-clang based > buildworld and/or buildkernel based > TARGET_ARCH=powerpc64 and > TARGET_ARCH=powerpc environments.] > > For TARGET_ARCH=powerpc devel/llvm40 and > devel/llvm50 get failure reports like: > > -- Looking for __atomic_load_8 in atomic - not found > CMake Error at cmake/modules/CheckAtomic.cmake:74 (message): > Host compiler appears to require libatomic, but cannot find it. > Call Stack (most recent call first): > cmake/config-ix.cmake:307 (include) > CMakeLists.txt:582 (include) > > > I had tried to avoid any need for 8-Byte atomics > (among other things) by avoiding LIT, LLD, and LLDB: > > # more /usr/local/etc/poudriere.d/options/devel_llvm50/options > # This file is auto-generated by 'make config'. > # Options for llvm50-5.0.0_1 > _OPTIONS_READ=llvm50-5.0.0_1 > _FILE_COMPLETE_OPTIONS_LIST=CLANG DOCS EXTRAS LIT LLD LLDB > OPTIONS_FILE_SET+=CLANG > OPTIONS_FILE_SET+=DOCS > OPTIONS_FILE_SET+=EXTRAS > OPTIONS_FILE_UNSET+=LIT > OPTIONS_FILE_UNSET+=LLD > OPTIONS_FILE_UNSET+=LLDB > > # more /usr/local/etc/poudriere.d/options/devel_llvm40/options > # This file is auto-generated by 'make config'. > # Options for llvm40-4.0.1_1 > _OPTIONS_READ=llvm40-4.0.1_1 > _FILE_COMPLETE_OPTIONS_LIST=CLANG DOCS EXTRAS LIT LLD LLDB > OPTIONS_FILE_SET+=CLANG > OPTIONS_FILE_SET+=DOCS > OPTIONS_FILE_SET+=EXTRAS > OPTIONS_FILE_UNSET+=LIT > OPTIONS_FILE_UNSET+=LLD > OPTIONS_FILE_UNSET+=LLDB > > For clang-based buildworld avoiding such things > prevents running into the 8-Byte atomics based > build failures: > > WITH_LIBCPLUSPLUS= > WITH_BINUTILS_BOOTSTRAP= > WITH_ELFTOOLCHAIN_BOOTSTRAP= > #WITH_CLANG_BOOTSTRAP= > WITH_CLANG= > WITH_CLANG_IS_CC= > WITH_CLANG_FULL= > WITH_CLANG_EXTRAS= > WITH_LLD= > # lldb requires missing atomic 8-byte operations for powerpc (non-64) > WITHOUT_LLDB= > # > WITH_BOOT= > > (Note: buildkernel currently fails.) > > # clang++ --version > FreeBSD clang version 5.0.0 (tags/RELEASE_500/final 312559) (based on LLVM 5.0.0svn) > Target: powerpc-unknown-freebsd12.0 > Thread model: posix > InstalledDir: /usr/bin > > # uname -apKU > FreeBSD FBSDG4S 12.0-CURRENT FreeBSD 12.0-CURRENT r326192M powerpc powerpc 1200054 1200054 > > # svnlite info /usr/ports/ | grep "Re[plv]" > Relative URL: ^/head > Repository Root: https://svn.freebsd.org/ports > Repository UUID: 35697150-7ecd-e111-bb59-0022644237b5 > Revision: 455204 > Last Changed Rev: 455204 > > > === > Mark Millard > markmi at dsl-only.net > > _______________________________________________ > freebsd-toolchain@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-toolchain > To unsubscribe, send any mail to "freebsd-toolchain-unsubscribe@freebsd.org"