Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752069AbdHGNDd (ORCPT ); Mon, 7 Aug 2017 09:03:33 -0400 Received: from mail-pg0-f49.google.com ([74.125.83.49]:35232 "EHLO mail-pg0-f49.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752035AbdHGNDb (ORCPT ); Mon, 7 Aug 2017 09:03:31 -0400 From: Joel Fernandes To: linux-kernel@vger.kernel.org Cc: Chenbo Feng , Alison Chaiken , Juri Lelli , Joel Fernandes , Alexei Starovoitov , Daniel Borkmann , netdev@vger.kernel.org (open list:BPF (Safe dynamic programs and tools)) Subject: [PATCH RFC 5/5] samples/bpf: Add documentation on cross compilation Date: Mon, 7 Aug 2017 06:03:06 -0700 Message-Id: <20170807130306.31530-6-joelaf@google.com> X-Mailer: git-send-email 2.14.0.rc1.383.gd1ce394fe2-goog In-Reply-To: <20170807130306.31530-1-joelaf@google.com> References: <20170807130306.31530-1-joelaf@google.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 947 Lines: 25 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 -- 2.14.0.rc1.383.gd1ce394fe2-goog