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 $@