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Date: Sun, 3 Sep 2017 11:25:49 -0700 From: Joel Fernandes <joelaf@...gle.com> To: linux-kernel@...r.kernel.org, netdev@...r.kernel.org Cc: kernel-team@...roid.com, Juri Lelli <juri.lelli@....com>, Alison Chaiken <alison@...-devel.com>, Chenbo Feng <fengc@...gle.com>, Joel Fernandes <joelaf@...gle.com>, Alexei Starovoitov <ast@...nel.org>, Daniel Borkmann <daniel@...earbox.net>, David Miller <davem@...emloft.net> Subject: [PATCH RFC v3 4/4] samples/bpf: Add documentation on cross compilation CC: Alexei Starovoitov <ast@...nel.org> CC: Daniel Borkmann <daniel@...earbox.net> CC: David Miller <davem@...emloft.net> Signed-off-by: Joel Fernandes <joelaf@...gle.com> --- 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
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