Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751992AbdITQMe (ORCPT ); Wed, 20 Sep 2017 12:12:34 -0400 Received: from mail-pf0-f174.google.com ([209.85.192.174]:43994 "EHLO mail-pf0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751938AbdITQMR (ORCPT ); Wed, 20 Sep 2017 12:12:17 -0400 X-Google-Smtp-Source: AOwi7QCLIXh6iGZmzMX/MafyErK7LRb+BgrlfxAKyJjG5C30V3Mno5mhJ1yZ33PJSnwK+XlkM/xBcA== From: Joel Fernandes To: linux-kernel@vger.kernel.org Cc: netdev@vger.kernel.org, alison@she-devel.com, juri.lelli@arm.com, fengc@google.com, daniel@iogearbox.net, davem@davemloft.net, ast@kernel.org, kernel-team@android.com, Joel Fernandes Subject: [PATCH v4 4/4] samples/bpf: Add documentation on cross compilation Date: Wed, 20 Sep 2017 09:11:59 -0700 Message-Id: <20170920161159.25747-4-joelaf@google.com> X-Mailer: git-send-email 2.14.1.821.g8fa685d3b7-goog In-Reply-To: <20170920161159.25747-1-joelaf@google.com> References: <20170920161159.25747-1-joelaf@google.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 989 Lines: 26 Acked-by: Alexei Starovoitov Signed-off-by: Joel Fernandes --- samples/bpf/README.rst | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/samples/bpf/README.rst b/samples/bpf/README.rst index 79f9a58f1872..2b906127ef54 100644 --- a/samples/bpf/README.rst +++ b/samples/bpf/README.rst @@ -64,3 +64,13 @@ It is also possible to point make to the newly compiled 'llc' or 'clang' command via redefining LLC or CLANG on the make command line:: make samples/bpf/ LLC=~/git/llvm/build/bin/llc CLANG=~/git/llvm/build/bin/clang + +Cross compiling samples +----------------------- +Inorder to cross-compile, say for arm64 targets, export CROSS_COMPILE and ARCH +environment variables before calling make. This will direct make to build +samples for the cross target. + +export ARCH=arm64 +export CROSS_COMPILE="aarch64-linux-gnu-" +make samples/bpf/ LLC=~/git/llvm/build/bin/llc CLANG=~/git/llvm/build/bin/clang -- 2.14.1.821.g8fa685d3b7-goog