diff mbox series

[v4,2/4] samples/bpf: Enable cross compiler support

Message ID 20170920161159.25747-2-joelaf@google.com
State Accepted, archived
Delegated to: David Miller
Headers show
Series Add cross-compilation support to eBPF samples | expand

Commit Message

Joel Fernandes Sept. 20, 2017, 4:11 p.m. UTC 
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>
---
 samples/bpf/Makefile | 5 +++++
 1 file changed, 5 insertions(+)

Comments

Daniel Borkmann Sept. 20, 2017, 9:24 p.m. UTC | #1 
On 09/20/2017 06:11 PM, Joel Fernandes wrote:
> 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>
diff mbox series

Patch

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)/