From patchwork Thu Dec 16 16:38:38 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jean-Philippe Brucker X-Patchwork-Id: 524807 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4C44EC43217 for ; Thu, 16 Dec 2021 16:50:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235158AbhLPQuu (ORCPT ); Thu, 16 Dec 2021 11:50:50 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50358 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235280AbhLPQut (ORCPT ); Thu, 16 Dec 2021 11:50:49 -0500 Received: from mail-wr1-x42f.google.com (mail-wr1-x42f.google.com [IPv6:2a00:1450:4864:20::42f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B0ED1C06173F for ; Thu, 16 Dec 2021 08:50:48 -0800 (PST) Received: by mail-wr1-x42f.google.com with SMTP id c4so45299789wrd.9 for ; Thu, 16 Dec 2021 08:50:48 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=PSj7odpkITXsYB6KPKrMVfI/4wK2fmXegdumHZrochE=; b=dFx0Hwhzmk2igT16BZ1rlhq6dmsS0U34aPp3se+PKa/ZzjcDBS4H2B6kjCKxkKkUnm o6bbpnrimMR8LF6ECf0WtkhDh2EwsMnPD6NRoVWZ3Tp4DtDLktxL0iVIpTPJq2V9Qwv6 EDxc97Zgs3TzNCmdnVAg6l87mbVeDbDElCjbimhMjpYcC+UqtEaWuZuyaDlBvmrhV5H0 LRsmVCx6Se20pdD0St80++FeXjiaE5H5VQbQWFA1Q/Letg6FRFrHEiDgCnA3MCGh4ySD 9Lz7jsukzN4m0l8WSFRE3c+xHkqiPX22/GW9xWqMudL/aDViMXN4MXRY7GYpluZ56GZy ZNWA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=PSj7odpkITXsYB6KPKrMVfI/4wK2fmXegdumHZrochE=; b=Rd5tGPxt1+KtuTPdelez2DTB5E8eyvEziHxr/0q6rW/tICOlemY/jPD/q9iQn0K8T4 4NA0w5pZoagaoFPjIwIp5U7POSEqbLLh7iY6grYzelVAUxS+d2xltxJUtZkQpoiSkO+h Q5m7moewNxr/HH+lXEQ2c343dyWSHxDQOxN6eYFKqzYnBSgp/KfXNRadzivoCs3JaLbM ZtriRAHzji82nujDJ4c4YU6qZDLbTDUHgk1O73olW5KohJx1Ws05ZEmy1trA4+4ENMU+ w2HIFXv4181QFBTGBINJVHV/oXpNTkAVKe8dxJV/uK5c+e2mHUh+RJOfhpcdgdFr2ZKg v9rQ== X-Gm-Message-State: AOAM53126KLZxFS3ZMF9VM0MPXw+LRr0Qs3oZMSu6XFQR4nNwsyBF2aY weJpy+Maro9RPwO0BYU0+Tvk0Q== X-Google-Smtp-Source: ABdhPJx+P9oqyIfuP9A1UsCS0C6AIk2H9RaJ+5KI1+5kFgW3KWUsbTT45+vSVithjhZ/h43RdNIdIQ== X-Received: by 2002:a5d:4b0a:: with SMTP id v10mr2043375wrq.294.1639673447321; Thu, 16 Dec 2021 08:50:47 -0800 (PST) Received: from localhost.localdomain (cpc92880-cmbg19-2-0-cust679.5-4.cable.virginm.net. [82.27.106.168]) by smtp.gmail.com with ESMTPSA id y15sm7438906wry.72.2021.12.16.08.50.46 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 16 Dec 2021 08:50:47 -0800 (PST) From: Jean-Philippe Brucker To: ast@kernel.org, daniel@iogearbox.net, andrii@kernel.org, shuah@kernel.org, nathan@kernel.org, ndesaulniers@google.com Cc: kafai@fb.com, songliubraving@fb.com, yhs@fb.com, john.fastabend@gmail.com, kpsingh@kernel.org, quentin@isovalent.com, bpf@vger.kernel.org, linux-kselftest@vger.kernel.org, llvm@lists.linux.dev, Jean-Philippe Brucker Subject: [PATCH bpf-next v2 1/6] tools: Help cross-building with clang Date: Thu, 16 Dec 2021 16:38:38 +0000 Message-Id: <20211216163842.829836-2-jean-philippe@linaro.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20211216163842.829836-1-jean-philippe@linaro.org> References: <20211216163842.829836-1-jean-philippe@linaro.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org Cross-compilation with clang uses the -target parameter rather than a toolchain prefix. Just like the kernel Makefile, add that parameter to CFLAGS when CROSS_COMPILE is set. Unlike the kernel Makefile, we use the --sysroot and --gcc-toolchain options because unlike the kernel, tools require standard libraries. Commit c91d4e47e10e ("Makefile: Remove '--gcc-toolchain' flag") provides some background about --gcc-toolchain. Normally clang finds on its own the additional utilities and libraries that it needs (for example GNU ld or glibc). On some systems however, this autodetection doesn't work. There, our only recourse is asking GCC directly, and pass the result to --sysroot and --gcc-toolchain. Of course that only works when a cross GCC is available. Autodetection worked fine on Debian, but to use the aarch64-linux-gnu toolchain from Archlinux I needed both --sysroot (for crt1.o) and --gcc-toolchain (for crtbegin.o, -lgcc). The --prefix parameter wasn't needed there, but it might be useful on other distributions. Use the CLANG_CROSS_FLAGS variable instead of CLANG_FLAGS because it allows tools such as bpftool, that need to build both host and target binaries, to easily filter out the cross-build flags from CFLAGS. Acked-by: Quentin Monnet Signed-off-by: Jean-Philippe Brucker --- Most tools I looked at needed additional changes to support cross-build with clang. I've only done the work for bpf tools. --- tools/scripts/Makefile.include | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-) diff --git a/tools/scripts/Makefile.include b/tools/scripts/Makefile.include index 071312f5eb92..b0be5f40a3f1 100644 --- a/tools/scripts/Makefile.include +++ b/tools/scripts/Makefile.include @@ -87,7 +87,18 @@ LLVM_STRIP ?= llvm-strip ifeq ($(CC_NO_CLANG), 1) EXTRA_WARNINGS += -Wstrict-aliasing=3 -endif + +else ifneq ($(CROSS_COMPILE),) +CLANG_CROSS_FLAGS := --target=$(notdir $(CROSS_COMPILE:%-=%)) +GCC_TOOLCHAIN_DIR := $(dir $(shell which $(CROSS_COMPILE)gcc)) +ifneq ($(GCC_TOOLCHAIN_DIR),) +CLANG_CROSS_FLAGS += --prefix=$(GCC_TOOLCHAIN_DIR)$(notdir $(CROSS_COMPILE)) +CLANG_CROSS_FLAGS += --sysroot=$(shell $(CROSS_COMPILE)gcc -print-sysroot) +CLANG_CROSS_FLAGS += --gcc-toolchain=$(realpath $(GCC_TOOLCHAIN_DIR)/..) +endif # GCC_TOOLCHAIN_DIR +CFLAGS += $(CLANG_CROSS_FLAGS) +AFLAGS += $(CLANG_CROSS_FLAGS) +endif # CROSS_COMPILE # Hack to avoid type-punned warnings on old systems such as RHEL5: # We should be changing CFLAGS and checking gcc version, but this From patchwork Thu Dec 16 16:38:39 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jean-Philippe Brucker X-Patchwork-Id: 525354 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 85C38C43219 for ; Thu, 16 Dec 2021 16:50:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235280AbhLPQuv (ORCPT ); Thu, 16 Dec 2021 11:50:51 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50362 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239688AbhLPQuu (ORCPT ); Thu, 16 Dec 2021 11:50:50 -0500 Received: from mail-wr1-x430.google.com (mail-wr1-x430.google.com [IPv6:2a00:1450:4864:20::430]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B0A2CC061746 for ; Thu, 16 Dec 2021 08:50:49 -0800 (PST) Received: by mail-wr1-x430.google.com with SMTP id c4so45299870wrd.9 for ; Thu, 16 Dec 2021 08:50:49 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=pJRqVurWv/xPXVPfg9RJJPd9MELUol7kDVQDIoB29M4=; b=j11Nk8Sqnke5x2cKuVDNGRjjHdUv65mw61hzMSDPnxhKxKjz9QpmvRbTOAP7PT0Qj4 lRXxMRjip+9dtbSJwULLTlpd8uQFObXQRsWQK8/SkwknGd8VnKGckm/sWIgoysHaC/Z8 HdC4fr9IHtl+IEBfF+F9+H/3xJPYuVVbF95I7BezfRE6DXptsOftO9AhzQ6zL24dejmq jSJY9DN376cNEDYkyJoBYBC9NY7VYUdMQyBdZH/81RjvIU84Yl1ebNqL7SVO3KFoofjN 8moq9RwIwng4+LkWkIyMunWctj6e/4mQi717khuAB1ziYwlG6OJGS4YONFdZQtSx0VUB j5OA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=pJRqVurWv/xPXVPfg9RJJPd9MELUol7kDVQDIoB29M4=; b=r1TwzHqN7XAjtSZfXlHx3pJBBNaSW7LzDmKIqqmUudVGJujy4cKQ4O9i5G604bK/Py Ay/5hCD5yWIlSYFoadiFICAzErY85qqZ/3yikbEu7Uy5bf8XiovPsiI6sHRA0geK0CWs MFaOug2CuuC1907Y+DsHFYo+5ckwAR1tHWi6L1rMgD09pmroOTqX4i2oXyjhaXqa0bMU jX9ha7iR3stjilOYouQEkB/t9VfJdC6z4HrhjaS4CpO0BTgYC+AZgfVyBA0rzR1Wp/r+ 0VTFSUV4Ug2PHim4MPLDBMY04DbL96rCuj+oMXKEKWb444VPXJDJycR27DKTn/B7oQ0w bKMQ== X-Gm-Message-State: AOAM531pcay7r9HVODa9J65QyBK3n0ciRXDoTygAqlWwFG5Lz0e3CCo+ 47714I3RLG7tSCWid6epGCsB7w== X-Google-Smtp-Source: ABdhPJxzwdAAnWi1SsHBCOcf33UW6I563gS8lB7I43K9co91J+vPwBcD4O7ZqVJpBGGrEwajiLNvbw== X-Received: by 2002:adf:f708:: with SMTP id r8mr10213612wrp.198.1639673448266; Thu, 16 Dec 2021 08:50:48 -0800 (PST) Received: from localhost.localdomain (cpc92880-cmbg19-2-0-cust679.5-4.cable.virginm.net. [82.27.106.168]) by smtp.gmail.com with ESMTPSA id y15sm7438906wry.72.2021.12.16.08.50.47 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 16 Dec 2021 08:50:47 -0800 (PST) From: Jean-Philippe Brucker To: ast@kernel.org, daniel@iogearbox.net, andrii@kernel.org, shuah@kernel.org, nathan@kernel.org, ndesaulniers@google.com Cc: kafai@fb.com, songliubraving@fb.com, yhs@fb.com, john.fastabend@gmail.com, kpsingh@kernel.org, quentin@isovalent.com, bpf@vger.kernel.org, linux-kselftest@vger.kernel.org, llvm@lists.linux.dev, Jean-Philippe Brucker Subject: [PATCH bpf-next v2 2/6] tools/resolve_btfids: Support cross-building the kernel with clang Date: Thu, 16 Dec 2021 16:38:39 +0000 Message-Id: <20211216163842.829836-3-jean-philippe@linaro.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20211216163842.829836-1-jean-philippe@linaro.org> References: <20211216163842.829836-1-jean-philippe@linaro.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org The CROSS_COMPILE variable may be present during resolve_btfids build if the kernel is being cross-built. Since resolve_btfids is always executed on the host, we set CC to HOSTCC in order to use the host toolchain when cross-building with GCC. But instead of a toolchain prefix, cross-build with clang uses a "-target" parameter, which Makefile.include deduces from the CROSS_COMPILE variable. In order to avoid cross-building libbpf, clear CROSS_COMPILE before building resolve_btfids. Acked-by: Quentin Monnet Signed-off-by: Jean-Philippe Brucker --- tools/bpf/resolve_btfids/Makefile | 1 + 1 file changed, 1 insertion(+) diff --git a/tools/bpf/resolve_btfids/Makefile b/tools/bpf/resolve_btfids/Makefile index 751643f860b2..9ddeca947635 100644 --- a/tools/bpf/resolve_btfids/Makefile +++ b/tools/bpf/resolve_btfids/Makefile @@ -19,6 +19,7 @@ CC = $(HOSTCC) LD = $(HOSTLD) ARCH = $(HOSTARCH) RM ?= rm +CROSS_COMPILE = OUTPUT ?= $(srctree)/tools/bpf/resolve_btfids/ From patchwork Thu Dec 16 16:38:40 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jean-Philippe Brucker X-Patchwork-Id: 524806 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id CAC36C433EF for ; Thu, 16 Dec 2021 16:50:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239756AbhLPQux (ORCPT ); Thu, 16 Dec 2021 11:50:53 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50372 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239753AbhLPQuv (ORCPT ); Thu, 16 Dec 2021 11:50:51 -0500 Received: from mail-wm1-x331.google.com (mail-wm1-x331.google.com [IPv6:2a00:1450:4864:20::331]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B2C8EC061574 for ; Thu, 16 Dec 2021 08:50:50 -0800 (PST) Received: by mail-wm1-x331.google.com with SMTP id y196so19297900wmc.3 for ; Thu, 16 Dec 2021 08:50:50 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=tJ57tzLvzYQgO/9a3Xp1difD235xOW6tp16fePO+Nvw=; b=FssgxFJeWNvA52S2sKL8qB9q1T0ylP/fCugzW2B7O25Ifxn5IiNuY3dG8Bzo6PA9Rk kwV+nNqZ9QZ/SRGM0ntcjAk3PpHDXtW8jGqDo9qv26D9ZXRjsiTPE1u3kX4VdjZi3mw9 T4yiRmy2ZNZOorhXbNxf3mtNLHNMKUPY7Q0GDycbsLZmO0Z1q38k9xLg2fOyYl5ZUcXM jYeDM2xivey529HnCxoeEYc+ilywrnRXW+QAzGS7iLw6UFoAcZ38r/SOBJoR6ATWvl0M F6zNnMzjkhW847CpHIaTyz3JMrC1f64//fNhIl1GGt/tZ2WKShrkm1VhRmkJ9PQpZc08 0Xdw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=tJ57tzLvzYQgO/9a3Xp1difD235xOW6tp16fePO+Nvw=; b=sXl00/aARiZgFQIvb5Ud9lWaMOIp9/N87I8FtjKSDxCexSdvl6L/+ao64nK2ZmOA5/ juH+slftp+48SsR/hlebHV6zbjntR75NUgLAe3ytMqBiNrxzQECY8PSf6zJYheatPwFC rqpAO0yze7NwobQhNheX23/qk6g3h4nIUsgv0SUZy+3G2OwqabHSlnvVujhG9CIXlq96 oaaoqT/hA2Nd8yvhm8dNNLF7NbXPQn87yCcIEG6MSiWlNl8v5wzgddowOAOGgN2e0zux GRfuymiP+SnmzmZR+paLTe/XojWmi/58+uohdm0i1D3Jh9AK57SkRR+VHRKEfux8/8hY mqKQ== X-Gm-Message-State: AOAM5329qLiMypVpXYkSzlv0u/sYgYEEnMzsy/ANdtZlBOeZ0M/OWfr2 KnThiY45FlV7nSahQDAt1OaTxw== X-Google-Smtp-Source: ABdhPJzkUQ91OzbhQT8Zh1Yv5cFer+EkjDQhAjtPzPWe+NBWXRNdGWaP8Jrjn9dbEUm9AuAgAFar0A== X-Received: by 2002:a1c:1f88:: with SMTP id f130mr5863988wmf.91.1639673449319; Thu, 16 Dec 2021 08:50:49 -0800 (PST) Received: from localhost.localdomain (cpc92880-cmbg19-2-0-cust679.5-4.cable.virginm.net. [82.27.106.168]) by smtp.gmail.com with ESMTPSA id y15sm7438906wry.72.2021.12.16.08.50.48 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 16 Dec 2021 08:50:49 -0800 (PST) From: Jean-Philippe Brucker To: ast@kernel.org, daniel@iogearbox.net, andrii@kernel.org, shuah@kernel.org, nathan@kernel.org, ndesaulniers@google.com Cc: kafai@fb.com, songliubraving@fb.com, yhs@fb.com, john.fastabend@gmail.com, kpsingh@kernel.org, quentin@isovalent.com, bpf@vger.kernel.org, linux-kselftest@vger.kernel.org, llvm@lists.linux.dev, Jean-Philippe Brucker Subject: [PATCH bpf-next v2 3/6] tools/libbpf: Enable cross-building with clang Date: Thu, 16 Dec 2021 16:38:40 +0000 Message-Id: <20211216163842.829836-4-jean-philippe@linaro.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20211216163842.829836-1-jean-philippe@linaro.org> References: <20211216163842.829836-1-jean-philippe@linaro.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org Cross-building using clang requires passing the "-target" flag rather than using the CROSS_COMPILE prefix. Makefile.include transforms CROSS_COMPILE into CLANG_CROSS_FLAGS. Add them to the CFLAGS. Acked-by: Quentin Monnet Signed-off-by: Jean-Philippe Brucker --- tools/lib/bpf/Makefile | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/tools/lib/bpf/Makefile b/tools/lib/bpf/Makefile index 5f7086fae31c..f947b61b2107 100644 --- a/tools/lib/bpf/Makefile +++ b/tools/lib/bpf/Makefile @@ -90,6 +90,7 @@ override CFLAGS += -Werror -Wall override CFLAGS += $(INCLUDES) override CFLAGS += -fvisibility=hidden override CFLAGS += -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 +override CFLAGS += $(CLANG_CROSS_FLAGS) # flags specific for shared library SHLIB_FLAGS := -DSHARED -fPIC @@ -162,7 +163,7 @@ $(BPF_HELPER_DEFS): $(srctree)/tools/include/uapi/linux/bpf.h $(OUTPUT)libbpf.so: $(OUTPUT)libbpf.so.$(LIBBPF_VERSION) $(OUTPUT)libbpf.so.$(LIBBPF_VERSION): $(BPF_IN_SHARED) $(VERSION_SCRIPT) - $(QUIET_LINK)$(CC) $(LDFLAGS) \ + $(QUIET_LINK)$(CC) $(CFLAGS) $(LDFLAGS) \ --shared -Wl,-soname,libbpf.so.$(LIBBPF_MAJOR_VERSION) \ -Wl,--version-script=$(VERSION_SCRIPT) $< -lelf -lz -o $@ @ln -sf $(@F) $(OUTPUT)libbpf.so From patchwork Thu Dec 16 16:38:41 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jean-Philippe Brucker X-Patchwork-Id: 525353 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id AF526C4167B for ; Thu, 16 Dec 2021 16:50:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235286AbhLPQux (ORCPT ); Thu, 16 Dec 2021 11:50:53 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50376 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239754AbhLPQuw (ORCPT ); Thu, 16 Dec 2021 11:50:52 -0500 Received: from mail-wr1-x42a.google.com (mail-wr1-x42a.google.com [IPv6:2a00:1450:4864:20::42a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id AA876C06173F for ; Thu, 16 Dec 2021 08:50:51 -0800 (PST) Received: by mail-wr1-x42a.google.com with SMTP id t26so8984331wrb.4 for ; Thu, 16 Dec 2021 08:50:51 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=XpxpkXYQscEfsWsFoTOiPTSmY6NepL3QKAAqEPptpwY=; b=uEb42ddIqlf5GTi3ZfvCLziEA2Eilam4mdrPDskEFILbqlZDTt866z35BAaU3OXZHX KeNHt5fs1ZtAzz7alex5nB2Q/jUC47m90SdVHPHB9cCqRsXQJRdDKQupAPYPNwOjBAZd +7JQ9b/5pv7PgWy8PUTjaj1lzzfOh6qR3Ky59lP6hPZ72rQe5JZjiZfN65ktvwmCiQii GAajOxxX0z3DRjzwwkO21PJE4xsaG1gTKIEBw/eaDF1EmrFziAbdPKi8lN2E4rsPmjQk 14/g2kUw1Gm7e8QICYTBHM3xBRi1fd2rPZckm8k/lXuq3QAp+a5sY5gLWLpGTL7vR1+p Wqug== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=XpxpkXYQscEfsWsFoTOiPTSmY6NepL3QKAAqEPptpwY=; b=AvjOsMNF/fqHBxeurTmp8dPh/6/sNxag9kGiHevB86gV5D+mUPj7QLU8jX/cJIvgqa EUf4A42pDZu8Z79hy9fXMfOEgl0uSV4+dhF40NkVWe+1WTbOeYr/8gfuzGlQyMMmBqnA 72gXi+tmqszd2tawxcEMoQE1px0EUMWeJDVfLF681XHPyhT4etO2gIDLS3UlvLtF2Awu y7OIhxUo1lnmqmwYI2xa3lAex80sWHpf2SzTAy6Ba4W+Osjk09JM/IdBhsOf8QL07rNV 0l5af00HPI8PxbnrVpd3qb4STKYijS1tCjjEpFFBuiQvcKDyN1JHapbAoiKlCrm1RfLt qnFA== X-Gm-Message-State: AOAM532YOZnZ6OsDYBchBklkcqW0rUSP3oQlTSyArDw32fyaQRnlVZl+ glVPQSNTEZ0IHdwV8kTKo85W/Q== X-Google-Smtp-Source: ABdhPJyh5IEh8DFsqYWeu4iMwCkRIQ4DYRdYJrE9x2CeUc8WZt+jk1IHdBFqcFelUpBlrrnjehm+nQ== X-Received: by 2002:a05:6000:188d:: with SMTP id a13mr9601163wri.461.1639673450279; Thu, 16 Dec 2021 08:50:50 -0800 (PST) Received: from localhost.localdomain (cpc92880-cmbg19-2-0-cust679.5-4.cable.virginm.net. [82.27.106.168]) by smtp.gmail.com with ESMTPSA id y15sm7438906wry.72.2021.12.16.08.50.49 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 16 Dec 2021 08:50:49 -0800 (PST) From: Jean-Philippe Brucker To: ast@kernel.org, daniel@iogearbox.net, andrii@kernel.org, shuah@kernel.org, nathan@kernel.org, ndesaulniers@google.com Cc: kafai@fb.com, songliubraving@fb.com, yhs@fb.com, john.fastabend@gmail.com, kpsingh@kernel.org, quentin@isovalent.com, bpf@vger.kernel.org, linux-kselftest@vger.kernel.org, llvm@lists.linux.dev, Jean-Philippe Brucker Subject: [PATCH bpf-next v2 4/6] bpftool: Enable cross-building with clang Date: Thu, 16 Dec 2021 16:38:41 +0000 Message-Id: <20211216163842.829836-5-jean-philippe@linaro.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20211216163842.829836-1-jean-philippe@linaro.org> References: <20211216163842.829836-1-jean-philippe@linaro.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org Cross-building using clang requires passing the "-target" flag rather than using the CROSS_COMPILE prefix. Makefile.include transforms CROSS_COMPILE into CLANG_CROSS_FLAGS, and adds that to CFLAGS. Remove the cross flags for the bootstrap bpftool, and erase the CROSS_COMPILE flag for the bootstrap libbpf. Acked-by: Quentin Monnet Signed-off-by: Jean-Philippe Brucker --- tools/bpf/bpftool/Makefile | 13 +++++++------ 1 file changed, 7 insertions(+), 6 deletions(-) diff --git a/tools/bpf/bpftool/Makefile b/tools/bpf/bpftool/Makefile index 42eb8eee3d89..83369f55df61 100644 --- a/tools/bpf/bpftool/Makefile +++ b/tools/bpf/bpftool/Makefile @@ -57,7 +57,7 @@ $(LIBBPF_INTERNAL_HDRS): $(LIBBPF_HDRS_DIR)/%.h: $(BPF_DIR)/%.h | $(LIBBPF_HDRS_ $(LIBBPF_BOOTSTRAP): $(wildcard $(BPF_DIR)/*.[ch] $(BPF_DIR)/Makefile) | $(LIBBPF_BOOTSTRAP_OUTPUT) $(Q)$(MAKE) -C $(BPF_DIR) OUTPUT=$(LIBBPF_BOOTSTRAP_OUTPUT) \ DESTDIR=$(LIBBPF_BOOTSTRAP_DESTDIR) prefix= \ - ARCH= CC=$(HOSTCC) LD=$(HOSTLD) $@ install_headers + ARCH= CROSS_COMPILE= CC=$(HOSTCC) LD=$(HOSTLD) $@ install_headers $(LIBBPF_BOOTSTRAP_INTERNAL_HDRS): $(LIBBPF_BOOTSTRAP_HDRS_DIR)/%.h: $(BPF_DIR)/%.h | $(LIBBPF_BOOTSTRAP_HDRS_DIR) $(call QUIET_INSTALL, $@) @@ -152,6 +152,9 @@ CFLAGS += -DHAVE_LIBBFD_SUPPORT SRCS += $(BFD_SRCS) endif +HOST_CFLAGS = $(subst -I$(LIBBPF_INCLUDE),-I$(LIBBPF_BOOTSTRAP_INCLUDE),\ + $(subst $(CLANG_CROSS_FLAGS),,$(CFLAGS))) + BPFTOOL_BOOTSTRAP := $(BOOTSTRAP_OUTPUT)bpftool BOOTSTRAP_OBJS = $(addprefix $(BOOTSTRAP_OUTPUT),main.o common.o json_writer.o gen.o btf.o xlated_dumper.o btf_dumper.o disasm.o) @@ -202,7 +205,7 @@ endif CFLAGS += $(if $(BUILD_BPF_SKELS),,-DBPFTOOL_WITHOUT_SKELETONS) $(BOOTSTRAP_OUTPUT)disasm.o: $(srctree)/kernel/bpf/disasm.c - $(QUIET_CC)$(HOSTCC) $(CFLAGS) -c -MMD $< -o $@ + $(QUIET_CC)$(HOSTCC) $(HOST_CFLAGS) -c -MMD $< -o $@ $(OUTPUT)disasm.o: $(srctree)/kernel/bpf/disasm.c $(QUIET_CC)$(CC) $(CFLAGS) -c -MMD $< -o $@ @@ -213,15 +216,13 @@ ifneq ($(feature-zlib), 1) endif $(BPFTOOL_BOOTSTRAP): $(BOOTSTRAP_OBJS) $(LIBBPF_BOOTSTRAP) - $(QUIET_LINK)$(HOSTCC) $(CFLAGS) $(LDFLAGS) $(BOOTSTRAP_OBJS) $(LIBS_BOOTSTRAP) -o $@ + $(QUIET_LINK)$(HOSTCC) $(HOST_CFLAGS) $(LDFLAGS) $(BOOTSTRAP_OBJS) $(LIBS_BOOTSTRAP) -o $@ $(OUTPUT)bpftool: $(OBJS) $(LIBBPF) $(QUIET_LINK)$(CC) $(CFLAGS) $(LDFLAGS) $(OBJS) $(LIBS) -o $@ $(BOOTSTRAP_OUTPUT)%.o: %.c $(LIBBPF_BOOTSTRAP_INTERNAL_HDRS) | $(BOOTSTRAP_OUTPUT) - $(QUIET_CC)$(HOSTCC) \ - $(subst -I$(LIBBPF_INCLUDE),-I$(LIBBPF_BOOTSTRAP_INCLUDE),$(CFLAGS)) \ - -c -MMD $< -o $@ + $(QUIET_CC)$(HOSTCC) $(HOST_CFLAGS) -c -MMD $< -o $@ $(OUTPUT)%.o: %.c $(QUIET_CC)$(CC) $(CFLAGS) -c -MMD $< -o $@ From patchwork Thu Dec 16 16:38:42 2021 Content-Type: text/plain; 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[82.27.106.168]) by smtp.gmail.com with ESMTPSA id y15sm7438906wry.72.2021.12.16.08.50.50 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 16 Dec 2021 08:50:50 -0800 (PST) From: Jean-Philippe Brucker To: ast@kernel.org, daniel@iogearbox.net, andrii@kernel.org, shuah@kernel.org, nathan@kernel.org, ndesaulniers@google.com Cc: kafai@fb.com, songliubraving@fb.com, yhs@fb.com, john.fastabend@gmail.com, kpsingh@kernel.org, quentin@isovalent.com, bpf@vger.kernel.org, linux-kselftest@vger.kernel.org, llvm@lists.linux.dev, Jean-Philippe Brucker Subject: [PATCH bpf-next v2 5/6] tools/runqslower: Enable cross-building with clang Date: Thu, 16 Dec 2021 16:38:42 +0000 Message-Id: <20211216163842.829836-6-jean-philippe@linaro.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20211216163842.829836-1-jean-philippe@linaro.org> References: <20211216163842.829836-1-jean-philippe@linaro.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org Cross-building using clang requires passing the "-target" flag rather than using the CROSS_COMPILE prefix. Makefile.include transforms CROSS_COMPILE into CLANG_CROSS_FLAGS. Add them to CFLAGS, and erase CROSS_COMPILE for the bpftool build, since it needs to be executed on the host. Acked-by: Quentin Monnet Signed-off-by: Jean-Philippe Brucker --- tools/bpf/runqslower/Makefile | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/tools/bpf/runqslower/Makefile b/tools/bpf/runqslower/Makefile index 8791d0e2762b..da6de16a3dfb 100644 --- a/tools/bpf/runqslower/Makefile +++ b/tools/bpf/runqslower/Makefile @@ -12,7 +12,7 @@ BPFOBJ := $(BPFOBJ_OUTPUT)libbpf.a BPF_DESTDIR := $(BPFOBJ_OUTPUT) BPF_INCLUDE := $(BPF_DESTDIR)/include INCLUDES := -I$(OUTPUT) -I$(BPF_INCLUDE) -I$(abspath ../../include/uapi) -CFLAGS := -g -Wall +CFLAGS := -g -Wall $(CLANG_CROSS_FLAGS) # Try to detect best kernel BTF source KERNEL_REL := $(shell uname -r) @@ -88,4 +88,4 @@ $(BPFOBJ): $(wildcard $(LIBBPF_SRC)/*.[ch] $(LIBBPF_SRC)/Makefile) | $(BPFOBJ_OU $(DEFAULT_BPFTOOL): $(BPFOBJ) | $(BPFTOOL_OUTPUT) $(Q)$(MAKE) $(submake_extras) -C ../bpftool OUTPUT=$(BPFTOOL_OUTPUT) \ - CC=$(HOSTCC) LD=$(HOSTLD) + ARCH= CROSS_COMPILE= CC=$(HOSTCC) LD=$(HOSTLD) From patchwork Thu Dec 16 16:38:43 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jean-Philippe Brucker X-Patchwork-Id: 525352 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5B385C4332F for ; Thu, 16 Dec 2021 16:50:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239727AbhLPQuz (ORCPT ); Thu, 16 Dec 2021 11:50:55 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50394 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239754AbhLPQuy (ORCPT ); Thu, 16 Dec 2021 11:50:54 -0500 Received: from mail-wm1-x335.google.com (mail-wm1-x335.google.com [IPv6:2a00:1450:4864:20::335]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9CC4AC06173E for ; Thu, 16 Dec 2021 08:50:53 -0800 (PST) Received: by mail-wm1-x335.google.com with SMTP id d198-20020a1c1dcf000000b0034569cdd2a2so3579010wmd.5 for ; Thu, 16 Dec 2021 08:50:53 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=sT7c6xsY79+p4VjCJ0GuWfCfN2sZ5xBnIoxrf7S6ddA=; b=zXJ8r9ZL0HMuqNYJiTcdyKwaAcd2Hm/hnU26Go6jzk3Hiqo6X0i9NLN9p6AspDCY0V DnjMCTaUmWGj8gTU4jp+mH45CQeZtiarFsCe+yc/f0nDOdAnPxjQC70VaJKYtLnLRShG PfSJ2EX7Nbd5fP3chAm3iaKeLZkRETpU0Ch5pbTy9u16mVSub4HJUIj7TwAybF5baBVB aXLVkPwjApwqDmEmqo9gMgPyBsB+4+3BjQeNQZ7QmKQ6kHmoEpzrgXUATJf+2OTny8zg HYP2jb9qpyT3+5zqx7mRL6VNvRtyMVnbb4ZHIkWgaGVJckVXv43kTDFrMfYDkPpU0rUj fK+A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=sT7c6xsY79+p4VjCJ0GuWfCfN2sZ5xBnIoxrf7S6ddA=; b=gap5LUPlfV5pQJF00eZ1MSt+5pLBPdPgv8KmOkruoDtRhJLGc7OLcdJaQ1I1Sy0ox9 G5zQTKCdTCVQdaGVicLFC6FdpTLY7EkREDukpZz31Uk8syR+wv4vDM9kiDuytKxrAzo3 8ta6qVoui3S2AN8YyoYhxWjzCvtUDd+AH6JEOdJuaLItXBr5CKnNDWfKHUY9AdqDLRMJ GF/YXO3KpBmq3MSjWwvAVE7PmAwwUASTEp+nqUtCMU+8WjWE4b/kZEi+T3j9FoEKf36a my4w+56ChHA8CXMRGP3Ww6sMCzj1gbouVpxRgbhfr8yZqUBUCPWHTZpCfm1paWpoV1eo TKWQ== X-Gm-Message-State: AOAM530o8BMmduYnVmAsNBI+fqppn1SnKHHn8dOk0liOJ3Ikp3Ls8ijA n5fxt08hkF4f163QOWEDKhFvbw== X-Google-Smtp-Source: ABdhPJyYw/JR5XWgtcqwAnuLqgpwIaezx+JHl1pGQ/V7SoktSGt0KL2b9TPIMm6Wy/etnCFJyiPINw== X-Received: by 2002:a05:600c:6d2:: with SMTP id b18mr5873052wmn.98.1639673452137; Thu, 16 Dec 2021 08:50:52 -0800 (PST) Received: from localhost.localdomain (cpc92880-cmbg19-2-0-cust679.5-4.cable.virginm.net. [82.27.106.168]) by smtp.gmail.com with ESMTPSA id y15sm7438906wry.72.2021.12.16.08.50.51 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 16 Dec 2021 08:50:51 -0800 (PST) From: Jean-Philippe Brucker To: ast@kernel.org, daniel@iogearbox.net, andrii@kernel.org, shuah@kernel.org, nathan@kernel.org, ndesaulniers@google.com Cc: kafai@fb.com, songliubraving@fb.com, yhs@fb.com, john.fastabend@gmail.com, kpsingh@kernel.org, quentin@isovalent.com, bpf@vger.kernel.org, linux-kselftest@vger.kernel.org, llvm@lists.linux.dev, Jean-Philippe Brucker Subject: [PATCH bpf-next v2 6/6] selftests/bpf: Enable cross-building with clang Date: Thu, 16 Dec 2021 16:38:43 +0000 Message-Id: <20211216163842.829836-7-jean-philippe@linaro.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20211216163842.829836-1-jean-philippe@linaro.org> References: <20211216163842.829836-1-jean-philippe@linaro.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org Cross building using clang requires passing the "-target" flag rather than using the CROSS_COMPILE prefix. Makefile.include transforms CROSS_COMPILE into CLANG_CROSS_FLAGS. Clear CROSS_COMPILE for bpftool and the host libbpf, and use the clang flags for urandom_read and bench. Acked-by: Quentin Monnet Signed-off-by: Jean-Philippe Brucker --- tools/testing/selftests/bpf/Makefile | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftests/bpf/Makefile index 43f6f3159431..42ffc24e9e71 100644 --- a/tools/testing/selftests/bpf/Makefile +++ b/tools/testing/selftests/bpf/Makefile @@ -170,7 +170,7 @@ $(OUTPUT)/%:%.c $(OUTPUT)/urandom_read: urandom_read.c $(call msg,BINARY,,$@) - $(Q)$(CC) $(LDFLAGS) $< $(LDLIBS) -Wl,--build-id=sha1 -o $@ + $(Q)$(CC) $(CFLAGS) $(LDFLAGS) $< $(LDLIBS) -Wl,--build-id=sha1 -o $@ $(OUTPUT)/bpf_testmod.ko: $(VMLINUX_BTF) $(wildcard bpf_testmod/Makefile bpf_testmod/*.[ch]) $(call msg,MOD,,$@) @@ -217,7 +217,7 @@ BPFTOOL ?= $(DEFAULT_BPFTOOL) $(DEFAULT_BPFTOOL): $(wildcard $(BPFTOOLDIR)/*.[ch] $(BPFTOOLDIR)/Makefile) \ $(HOST_BPFOBJ) | $(HOST_BUILD_DIR)/bpftool $(Q)$(MAKE) $(submake_extras) -C $(BPFTOOLDIR) \ - CC=$(HOSTCC) LD=$(HOSTLD) \ + ARCH= CROSS_COMPILE= CC=$(HOSTCC) LD=$(HOSTLD) \ EXTRA_CFLAGS='-g -O0' \ OUTPUT=$(HOST_BUILD_DIR)/bpftool/ \ LIBBPF_OUTPUT=$(HOST_BUILD_DIR)/libbpf/ \ @@ -248,7 +248,7 @@ $(HOST_BPFOBJ): $(wildcard $(BPFDIR)/*.[ch] $(BPFDIR)/Makefile) \ $(APIDIR)/linux/bpf.h \ | $(HOST_BUILD_DIR)/libbpf $(Q)$(MAKE) $(submake_extras) -C $(BPFDIR) \ - EXTRA_CFLAGS='-g -O0' \ + EXTRA_CFLAGS='-g -O0' ARCH= CROSS_COMPILE= \ OUTPUT=$(HOST_BUILD_DIR)/libbpf/ CC=$(HOSTCC) LD=$(HOSTLD) \ DESTDIR=$(HOST_SCRATCH_DIR)/ prefix= all install_headers endif @@ -551,7 +551,7 @@ $(OUTPUT)/bench: $(OUTPUT)/bench.o \ $(OUTPUT)/bench_bpf_loop.o \ $(OUTPUT)/bench_strncmp.o $(call msg,BINARY,,$@) - $(Q)$(CC) $(LDFLAGS) $(filter %.a %.o,$^) $(LDLIBS) -o $@ + $(Q)$(CC) $(CFLAGS) $(LDFLAGS) $(filter %.a %.o,$^) $(LDLIBS) -o $@ EXTRA_CLEAN := $(TEST_CUSTOM_PROGS) $(SCRATCH_DIR) $(HOST_SCRATCH_DIR) \ prog_tests/tests.h map_tests/tests.h verifier/tests.h \