Thread (11 messages) read the whole thread 11 messages, 1 author, 2019-08-30
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[PATCH RFC bpf-next 01/10] samples: bpf: Makefile: use --target from cross-compile

From: Ivan Khoronzhuk <hidden>
Date: 2019-08-30 00:51:21
Also in: bpf, linux-arm-kernel, lkml
Subsystem: bpf [general] (safe dynamic programs and tools), the rest · Maintainers: Alexei Starovoitov, Daniel Borkmann, Andrii Nakryiko, Eduard Zingerman, Kumar Kartikeya Dwivedi, Linus Torvalds

For cross compiling the target triple can be inherited from
cross-compile prefix as it's done in CLANG_FLAGS from kernel makefile.
So copy-paste this decision from kernel Makefile.

Signed-off-by: Ivan Khoronzhuk <redacted>
---
 samples/bpf/Makefile | 2 ++
 1 file changed, 2 insertions(+)
diff --git a/samples/bpf/Makefile b/samples/bpf/Makefile
index 1d9be26b4edd..61b7394b811e 100644
--- a/samples/bpf/Makefile
+++ b/samples/bpf/Makefile
@@ -196,6 +196,8 @@ BTF_PAHOLE ?= pahole
 # Detect that we're cross compiling and use the cross compiler
 ifdef CROSS_COMPILE
 HOSTCC = $(CROSS_COMPILE)gcc
+CLANG_ARCH_ARGS = --target=$(notdir $(CROSS_COMPILE:%-=%))
+else
 CLANG_ARCH_ARGS = -target $(ARCH)
 endif
 
-- 
2.17.1
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