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authorJoel Fernandes <joelaf@google.com>2017-09-20 09:11:59 -0700
committerDavid S. Miller <davem@davemloft.net>2017-09-21 11:59:16 -0700
commit8bf2ac25a96c69985a1a9fbbad7da22ae4343a38 (patch)
tree3a99f3b18a470af3cc600720f021bc6f20444b16 /samples
parentsamples/bpf: Fix pt_regs issues when cross-compiling (diff)
downloadlinux-dev-8bf2ac25a96c69985a1a9fbbad7da22ae4343a38.tar.xz
linux-dev-8bf2ac25a96c69985a1a9fbbad7da22ae4343a38.zip
samples/bpf: Add documentation on cross compilation
Acked-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: Joel Fernandes <joelaf@google.com> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'samples')
-rw-r--r--samples/bpf/README.rst10
1 files changed, 10 insertions, 0 deletions
diff --git a/samples/bpf/README.rst b/samples/bpf/README.rst
index 79f9a58f1872..5f27e4faca50 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
+-----------------------
+In order 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