From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.3 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 70A95C00307 for ; Fri, 6 Sep 2019 23:52:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4B8212173E for ; Fri, 6 Sep 2019 23:52:14 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="N8apvxEu" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2393258AbfIFXwN (ORCPT ); Fri, 6 Sep 2019 19:52:13 -0400 Received: from mail-lj1-f194.google.com ([209.85.208.194]:36342 "EHLO mail-lj1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732440AbfIFXwN (ORCPT ); Fri, 6 Sep 2019 19:52:13 -0400 Received: by mail-lj1-f194.google.com with SMTP id l20so7523888ljj.3 for ; Fri, 06 Sep 2019 16:52:12 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=date:from:to:cc:subject:message-id:mail-followup-to:references :mime-version:content-disposition:in-reply-to:user-agent; bh=7gt+dprtIaWWWiehpVBpT9gjTU5sJKWHbohiXhkeDVw=; b=N8apvxEuyAMDm7IdWzHrNax6Ft6Lvj8/T5bGsnuBYBtBJ5220TDZcpKa/hGVGfOAHk oloaJcf7HJINFllAa8ld9Vm/vwaHXJCNdjdU3jX3LY2J83sYJMHZLqDnN/LzOpY1Wqf4 gXWFd7YiKBxu+RyqKpqecrgh2H0RVgIVuybb9Jg2GV6XXGaYImkOrd6BhLOiByqE+pYS 3i2TeTS9cvlSA1odIj+9mEqPiVH/fuRdT2gy+pCu4aA1pWyjAwZw+4I3F4wNPeLxZfX2 QqmHBqKAV3MpPRe2IeOcum5xzZmiAxpUX/8nMZfJeNXM2p0zHBpMMa96l7uVfATdoEuo 83bg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id :mail-followup-to:references:mime-version:content-disposition :in-reply-to:user-agent; bh=7gt+dprtIaWWWiehpVBpT9gjTU5sJKWHbohiXhkeDVw=; b=d05UAlGKd8IRPFowR5oiPnK00M2bLbFJ9sOD5gDd6+oHUGhhdl2WRffBopj90LV1D7 bRiUqiif3SG2qUOE8uxs2Mx5UAVJlNr1TpHT/EBoHuiSsX+XUidKTPpjQjUsdhuSnptg 6eQb7nhDNDUB4hQJfkodq7J/1McCXZbFoctS3kgd39oWl8zik+xvTwCpIvPJ1FcgXXXl 3gyD05HV7jPAFvG8jAGVr06+ohdc8Jq19NEnkRfachX/IOvY5s1JbR/XXYXcVAvqIn3t rj8KK6LFUYEFq+6QuKeBGV0buWh9qDx81D5sAoqMswTc8U4jwwoEfk+1d7upM2VAtlvz W4Tg== X-Gm-Message-State: APjAAAXHpmb8/YthnxZlhOXZ3LY0A4FBMJKUHA2HpNN2cKyVnrswd7q2 4V+N133tT6EJl7SSsYm0GWpR4g== X-Google-Smtp-Source: APXvYqzks9jN+Vc+WCVfIT3Izxu7CuU+7cTYAXJzMrP6IaIIHCaeKcyAscaFaspGG5UANI+GaQJ7fg== X-Received: by 2002:a2e:b4db:: with SMTP id r27mr7238028ljm.110.1567813931698; Fri, 06 Sep 2019 16:52:11 -0700 (PDT) Received: from khorivan (168-200-94-178.pool.ukrtel.net. [178.94.200.168]) by smtp.gmail.com with ESMTPSA id t5sm1408113lfl.91.2019.09.06.16.52.10 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Fri, 06 Sep 2019 16:52:11 -0700 (PDT) Date: Sat, 7 Sep 2019 02:52:08 +0300 From: Ivan Khoronzhuk To: Alexei Starovoitov Cc: ast@kernel.org, daniel@iogearbox.net, yhs@fb.com, davem@davemloft.net, jakub.kicinski@netronome.com, hawk@kernel.org, john.fastabend@gmail.com, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, bpf@vger.kernel.org, clang-built-linux@googlegroups.com Subject: Re: [PATCH bpf-next 2/8] samples: bpf: Makefile: remove target for native build Message-ID: <20190906235207.GA3053@khorivan> Mail-Followup-To: Alexei Starovoitov , ast@kernel.org, daniel@iogearbox.net, yhs@fb.com, davem@davemloft.net, jakub.kicinski@netronome.com, hawk@kernel.org, john.fastabend@gmail.com, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, bpf@vger.kernel.org, clang-built-linux@googlegroups.com References: <20190904212212.13052-1-ivan.khoronzhuk@linaro.org> <20190904212212.13052-3-ivan.khoronzhuk@linaro.org> <20190906233138.4d4fqdnlbikemhau@ast-mbp.dhcp.thefacebook.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Disposition: inline In-Reply-To: <20190906233138.4d4fqdnlbikemhau@ast-mbp.dhcp.thefacebook.com> User-Agent: Mutt/1.9.4 (2018-02-28) Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org On Fri, Sep 06, 2019 at 04:31:39PM -0700, Alexei Starovoitov wrote: >On Thu, Sep 05, 2019 at 12:22:06AM +0300, Ivan Khoronzhuk wrote: >> No need to set --target for native build, at least for arm, the >> default target will be used anyway. In case of arm, for at least >> clang 5 - 10 it causes error like: >> >> clang: warning: unknown platform, assuming -mfloat-abi=soft >> LLVM ERROR: Unsupported calling convention >> make[2]: *** [/home/root/snapshot/samples/bpf/Makefile:299: >> /home/root/snapshot/samples/bpf/sockex1_kern.o] Error 1 >> >> Only set to real triple helps: --target=arm-linux-gnueabihf >> or just drop the target key to use default one. Decision to just >> drop it and thus default target will be used (wich is native), >> looks better. >> >> Signed-off-by: Ivan Khoronzhuk >> --- >> samples/bpf/Makefile | 2 -- >> 1 file changed, 2 deletions(-) >> >> diff --git a/samples/bpf/Makefile b/samples/bpf/Makefile >> index 61b7394b811e..a2953357927e 100644 >> --- a/samples/bpf/Makefile >> +++ b/samples/bpf/Makefile >> @@ -197,8 +197,6 @@ BTF_PAHOLE ?= pahole >> ifdef CROSS_COMPILE >> HOSTCC = $(CROSS_COMPILE)gcc >> CLANG_ARCH_ARGS = --target=$(notdir $(CROSS_COMPILE:%-=%)) >> -else >> -CLANG_ARCH_ARGS = -target $(ARCH) >> endif > >I don't follow here. >Didn't you introduce this bug in patch 1 and now fixing it in patch 2? > It looks like but that's not true. Previous patch adds target only for cross compiling, before the patch the target was used for both, cross compiling and w/o cc. This patch removes target only for native build (it's not cross compiling). By fact, it's two separate significant changes. -- Regards, Ivan Khoronzhuk