From mboxrd@z Thu Jan 1 00:00:00 1970 From: Randy Dunlap Subject: Re: [PATCH v4 4/4] samples/bpf: Add documentation on cross compilation Date: Wed, 20 Sep 2017 09:50:07 -0700 Message-ID: References: <20170920161159.25747-1-joelaf@google.com> <20170920161159.25747-4-joelaf@google.com> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit 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 To: Joel Fernandes , linux-kernel@vger.kernel.org Return-path: In-Reply-To: <20170920161159.25747-4-joelaf@google.com> Content-Language: en-US Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org On 09/20/17 09:11, Joel Fernandes wrote: > 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 In order to > +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 > -- ~Randy