From patchwork Wed Jan 13 16:33:16 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: 12017337 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=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham 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 A267DC433E0 for ; Wed, 13 Jan 2021 16:35:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7119923600 for ; Wed, 13 Jan 2021 16:35:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727327AbhAMQfe (ORCPT ); Wed, 13 Jan 2021 11:35:34 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36414 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727370AbhAMQfd (ORCPT ); Wed, 13 Jan 2021 11:35:33 -0500 Received: from mail-ej1-x62e.google.com (mail-ej1-x62e.google.com [IPv6:2a00:1450:4864:20::62e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7275EC061794 for ; Wed, 13 Jan 2021 08:34:53 -0800 (PST) Received: by mail-ej1-x62e.google.com with SMTP id q22so3985319eja.2 for ; Wed, 13 Jan 2021 08:34:53 -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=WzeKjk6W2CxYi95uCJrjtjO+Mh+ZYv+OVOJ0F2MC/Ds=; b=V1PkJPpfoUhuI2v7Or3K6Aasit7NEsidV/b+AhjMSV6csJcSObKx1qxwjxyWbZhYTV U1rqPVsA1/Ztz6COPZYjx0gg+fU3+E/+w191oU3rAZTG9x8koHZwx5YGzByKWcYV5X6r UGo5q9tp5tLy2ABaanCMNzyb1q7O19ldm/03VB+tG/EHz3Q1D7ilBrW1VV/4CpLh+fYR HegIe7o2CsyJJMtLNU4p97ATsjL2uN/jronxkOIDh5X0rXbV8At4PwYsyN9bc8HGSm8z Pd4J4o2h1pbbD2TZRvUUbENpy+EQm+U78uOo/K3p2H8KGvn61dnXsyent9BlokqGp1H4 4+/A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=WzeKjk6W2CxYi95uCJrjtjO+Mh+ZYv+OVOJ0F2MC/Ds=; b=n/gE5PoUtp26PXRP/UH05NBLliaDqigbpELUZp27D1cm+sfDbtqQ0zccuC8Aa3cWDH TqHRTZJLzXZ1YxQHe7EGryJtfGf5Sofp8qiM6dWRQMj2heZAekhwhPEaaxVeEa62sysO W4sG7AMBi6NC/jopSvtUsTmHoIp4ntPtQuXNzhus91wdQGwFYThxwAo6MtfxEjf2xGGY cIxX5yoEv1kdjbk+bZNpkNygxw9yyJHfjvl29ZE8JSLqLgiBZ+e0bg/qNYFUyTE5jbAA GSnf7jsJyLH9gwYWaxYYsZ+0zJ623UTCvexLd+iSBsYEsQau02ICAovwJVYpVqhRxlu8 tccw== X-Gm-Message-State: AOAM530fljMbz/lm3Rw2GWTynY/BTyvKBOB2ryR2R0cQo1QfVJ2d/UQ8 vZTc7rg9mCNdtvCVbzztYmOEqQ== X-Google-Smtp-Source: ABdhPJzg8H3ADXCit0AoriOFHJL0dtctl3lFhEkY2tu1GfeckpfeF4w1Mina2VQpHVoKQUn5ylbVmw== X-Received: by 2002:a17:907:546:: with SMTP id wk6mr2117779ejb.238.1610555692085; Wed, 13 Jan 2021 08:34:52 -0800 (PST) Received: from localhost.localdomain ([2001:1715:4e26:a7e0:116c:c27a:3e7f:5eaf]) by smtp.gmail.com with ESMTPSA id g25sm923943ejf.15.2021.01.13.08.34.50 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 13 Jan 2021 08:34:51 -0800 (PST) From: Jean-Philippe Brucker To: bpf@vger.kernel.org Cc: shuah@kernel.org, ast@kernel.org, daniel@iogearbox.net, andrii@kernel.org, kafai@fb.com, songliubraving@fb.com, yhs@fb.com, john.fastabend@gmail.com, kpsingh@kernel.org, linux-kselftest@vger.kernel.org, Jean-Philippe Brucker Subject: [PATCH bpf-next v2 1/5] selftests/bpf: Enable cross-building Date: Wed, 13 Jan 2021 17:33:16 +0100 Message-Id: <20210113163319.1516382-2-jean-philippe@linaro.org> X-Mailer: git-send-email 2.30.0 In-Reply-To: <20210113163319.1516382-1-jean-philippe@linaro.org> References: <20210113163319.1516382-1-jean-philippe@linaro.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org Build bpftool and resolve_btfids using the host toolchain when cross-compiling, since they are executed during build to generate the selftests. Add a host build directory in order to build both host and target version of libbpf. Build host tools using $(HOSTCC) defined in Makefile.include. Acked-by: Andrii Nakryiko Signed-off-by: Jean-Philippe Brucker --- tools/testing/selftests/bpf/Makefile | 46 +++++++++++++++++++++------- 1 file changed, 35 insertions(+), 11 deletions(-) diff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftests/bpf/Makefile index c51df6b91bef..95ce81513648 100644 --- a/tools/testing/selftests/bpf/Makefile +++ b/tools/testing/selftests/bpf/Makefile @@ -1,6 +1,7 @@ # SPDX-License-Identifier: GPL-2.0 include ../../../../scripts/Kbuild.include include ../../../scripts/Makefile.arch +include ../../../scripts/Makefile.include CXX ?= $(CROSS_COMPILE)g++ @@ -113,7 +114,15 @@ SCRATCH_DIR := $(OUTPUT)/tools BUILD_DIR := $(SCRATCH_DIR)/build INCLUDE_DIR := $(SCRATCH_DIR)/include BPFOBJ := $(BUILD_DIR)/libbpf/libbpf.a -RESOLVE_BTFIDS := $(BUILD_DIR)/resolve_btfids/resolve_btfids +ifneq ($(CROSS_COMPILE),) +HOST_BUILD_DIR := $(BUILD_DIR)/host +HOST_SCRATCH_DIR := $(OUTPUT)/host-tools +else +HOST_BUILD_DIR := $(BUILD_DIR) +HOST_SCRATCH_DIR := $(SCRATCH_DIR) +endif +HOST_BPFOBJ := $(HOST_BUILD_DIR)/libbpf/libbpf.a +RESOLVE_BTFIDS := $(HOST_BUILD_DIR)/resolve_btfids/resolve_btfids VMLINUX_BTF_PATHS ?= $(if $(O),$(O)/vmlinux) \ $(if $(KBUILD_OUTPUT),$(KBUILD_OUTPUT)/vmlinux) \ @@ -135,6 +144,14 @@ $(notdir $(TEST_GEN_PROGS) \ $(TEST_GEN_PROGS_EXTENDED) \ $(TEST_CUSTOM_PROGS)): %: $(OUTPUT)/% ; +# sort removes libbpf duplicates when not cross-building +MAKE_DIRS := $(sort $(BUILD_DIR)/libbpf $(HOST_BUILD_DIR)/libbpf \ + $(HOST_BUILD_DIR)/bpftool $(HOST_BUILD_DIR)/resolve_btfids \ + $(INCLUDE_DIR)) +$(MAKE_DIRS): + $(call msg,MKDIR,,$@) + $(Q)mkdir -p $@ + $(OUTPUT)/%.o: %.c $(call msg,CC,,$@) $(Q)$(CC) $(CFLAGS) -c $(filter %.c,$^) $(LDLIBS) -o $@ @@ -157,7 +174,7 @@ $(OUTPUT)/test_stub.o: test_stub.c $(BPFOBJ) $(call msg,CC,,$@) $(Q)$(CC) -c $(CFLAGS) -o $@ $< -DEFAULT_BPFTOOL := $(SCRATCH_DIR)/sbin/bpftool +DEFAULT_BPFTOOL := $(HOST_SCRATCH_DIR)/sbin/bpftool $(OUTPUT)/runqslower: $(BPFOBJ) | $(DEFAULT_BPFTOOL) $(Q)$(MAKE) $(submake_extras) -C $(TOOLSDIR)/bpf/runqslower \ @@ -182,10 +199,11 @@ $(OUTPUT)/test_sysctl: cgroup_helpers.c BPFTOOL ?= $(DEFAULT_BPFTOOL) $(DEFAULT_BPFTOOL): $(wildcard $(BPFTOOLDIR)/*.[ch] $(BPFTOOLDIR)/Makefile) \ - $(BPFOBJ) | $(BUILD_DIR)/bpftool + $(HOST_BPFOBJ) | $(HOST_BUILD_DIR)/bpftool $(Q)$(MAKE) $(submake_extras) -C $(BPFTOOLDIR) \ - OUTPUT=$(BUILD_DIR)/bpftool/ \ - prefix= DESTDIR=$(SCRATCH_DIR)/ install + CC=$(HOSTCC) LD=$(HOSTLD) \ + OUTPUT=$(HOST_BUILD_DIR)/bpftool/ \ + prefix= DESTDIR=$(HOST_SCRATCH_DIR)/ install $(Q)mkdir -p $(BUILD_DIR)/bpftool/Documentation $(Q)RST2MAN_OPTS="--exit-status=1" $(MAKE) $(submake_extras) \ -C $(BPFTOOLDIR)/Documentation \ @@ -198,9 +216,14 @@ $(BPFOBJ): $(wildcard $(BPFDIR)/*.[ch] $(BPFDIR)/Makefile) \ $(Q)$(MAKE) $(submake_extras) -C $(BPFDIR) OUTPUT=$(BUILD_DIR)/libbpf/ \ DESTDIR=$(SCRATCH_DIR) prefix= all install_headers -$(BUILD_DIR)/libbpf $(BUILD_DIR)/bpftool $(BUILD_DIR)/resolve_btfids $(INCLUDE_DIR): - $(call msg,MKDIR,,$@) - $(Q)mkdir -p $@ +ifneq ($(BPFOBJ),$(HOST_BPFOBJ)) +$(HOST_BPFOBJ): $(wildcard $(BPFDIR)/*.[ch] $(BPFDIR)/Makefile) \ + ../../../include/uapi/linux/bpf.h \ + | $(INCLUDE_DIR) $(HOST_BUILD_DIR)/libbpf + $(Q)$(MAKE) $(submake_extras) -C $(BPFDIR) \ + OUTPUT=$(HOST_BUILD_DIR)/libbpf/ CC=$(HOSTCC) LD=$(HOSTLD) \ + DESTDIR=$(HOST_SCRATCH_DIR)/ prefix= all install_headers +endif $(INCLUDE_DIR)/vmlinux.h: $(VMLINUX_BTF) | $(BPFTOOL) $(INCLUDE_DIR) ifeq ($(VMLINUX_H),) @@ -211,7 +234,7 @@ else $(Q)cp "$(VMLINUX_H)" $@ endif -$(RESOLVE_BTFIDS): $(BPFOBJ) | $(BUILD_DIR)/resolve_btfids \ +$(RESOLVE_BTFIDS): $(HOST_BPFOBJ) | $(HOST_BUILD_DIR)/resolve_btfids \ $(TOOLSDIR)/bpf/resolve_btfids/main.c \ $(TOOLSDIR)/lib/rbtree.c \ $(TOOLSDIR)/lib/zalloc.c \ @@ -219,7 +242,8 @@ $(RESOLVE_BTFIDS): $(BPFOBJ) | $(BUILD_DIR)/resolve_btfids \ $(TOOLSDIR)/lib/ctype.c \ $(TOOLSDIR)/lib/str_error_r.c $(Q)$(MAKE) $(submake_extras) -C $(TOOLSDIR)/bpf/resolve_btfids \ - OUTPUT=$(BUILD_DIR)/resolve_btfids/ BPFOBJ=$(BPFOBJ) + CC=$(HOSTCC) LD=$(HOSTLD) AR=$(HOSTAR) \ + OUTPUT=$(HOST_BUILD_DIR)/resolve_btfids/ BPFOBJ=$(HOST_BPFOBJ) # Get Clang's default includes on this system, as opposed to those seen by # '-target bpf'. This fixes "missing" files on some architectures/distros, @@ -450,7 +474,7 @@ $(OUTPUT)/bench: $(OUTPUT)/bench.o $(OUTPUT)/testing_helpers.o \ $(call msg,BINARY,,$@) $(Q)$(CC) $(LDFLAGS) -o $@ $(filter %.a %.o,$^) $(LDLIBS) -EXTRA_CLEAN := $(TEST_CUSTOM_PROGS) $(SCRATCH_DIR) \ +EXTRA_CLEAN := $(TEST_CUSTOM_PROGS) $(SCRATCH_DIR) $(HOST_SCRATCH_DIR) \ prog_tests/tests.h map_tests/tests.h verifier/tests.h \ feature \ $(addprefix $(OUTPUT)/,*.o *.skel.h no_alu32 bpf_gcc bpf_testmod.ko)