From 876e88e3273e300895e308bd660c6cfaabb03cd5 Mon Sep 17 00:00:00 2001
From: Joel Fernandes <joelaf@google.com>
Date: Wed, 20 Sep 2017 09:11:57 -0700
Subject: samples/bpf: Enable cross compiler support

When cross compiling, bpf samples use HOSTCC for compiling the non-BPF part of
the sample, however what we really want is to use the cross compiler to build
for the cross target since that is what will load and run the BPF sample.
Detect this and compile samples correctly.

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>
---
 samples/bpf/Makefile | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/samples/bpf/Makefile b/samples/bpf/Makefile
index cf17c7932a6e..13f74b67ca44 100644
--- a/samples/bpf/Makefile
+++ b/samples/bpf/Makefile
@@ -177,6 +177,11 @@ HOSTLOADLIBES_syscall_tp += -lelf
 LLC ?= llc
 CLANG ?= clang
 
+# Detect that we're cross compiling and use the cross compiler
+ifdef CROSS_COMPILE
+HOSTCC = $(CROSS_COMPILE)gcc
+endif
+
 # Trick to allow make to be run from this directory
 all:
 	$(MAKE) -C ../../ $(CURDIR)/
-- 
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