From mboxrd@z Thu Jan 1 00:00:00 1970 From: Joel Fernandes Subject: [PATCH RFC v3 4/4] samples/bpf: Add documentation on cross compilation Date: Sun, 3 Sep 2017 11:25:49 -0700 Message-ID: <20170903182549.30866-4-joelaf@google.com> References: <20170903182549.30866-1-joelaf@google.com> Cc: kernel-team@android.com, Juri Lelli , Alison Chaiken , Chenbo Feng , Joel Fernandes , Alexei Starovoitov , Daniel Borkmann , David Miller To: linux-kernel@vger.kernel.org, netdev@vger.kernel.org Return-path: In-Reply-To: <20170903182549.30866-1-joelaf@google.com> Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org CC: Alexei Starovoitov CC: Daniel Borkmann CC: David Miller 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 -- 2.14.1.581.gf28d330327-goog