linux-kernel - [PATCH v4 bpf-next 03/15] samples/bpf: use --target from cross-compile

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Message-Id: <20191009204134.26960-4-ivan.khoronzhuk@linaro.org>
Date:   Wed,  9 Oct 2019 23:41:22 +0300
From:   Ivan Khoronzhuk <ivan.khoronzhuk@...aro.org>
To:     ast@...nel.org, daniel@...earbox.net, yhs@...com,
        davem@...emloft.net, jakub.kicinski@...ronome.com, hawk@...nel.org,
        john.fastabend@...il.com
Cc:     linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        bpf@...r.kernel.org, clang-built-linux@...glegroups.com,
        ilias.apalodimas@...aro.org, sergei.shtylyov@...entembedded.com,
        Ivan Khoronzhuk <ivan.khoronzhuk@...aro.org>
Subject: [PATCH v4 bpf-next 03/15] samples/bpf: use --target from cross-compile

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.

Acked-by: Andrii Nakryiko <andriin@...com>
Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@...aro.org>
---
 samples/bpf/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/samples/bpf/Makefile b/samples/bpf/Makefile
index 045fa43842e6..9c8c9872004d 100644
--- a/samples/bpf/Makefile
+++ b/samples/bpf/Makefile
@@ -195,7 +195,7 @@ 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 $(ARCH)
+CLANG_ARCH_ARGS = --target=$(notdir $(CROSS_COMPILE:%-=%))
 endif
 
 # Don't evaluate probes and warnings if we need to run make recursively
-- 
2.17.1