linux-kernel - Re: [BUG] perf cross-compile error dual to fixdep not host-exe

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Date:	Wed, 30 Sep 2015 08:13:10 +0200
From:	Jiri Olsa <jolsa@...hat.com>
To:	He Kuang <hekuang@...wei.com>
Cc:	jolsa@...nel.org, David Ahern <dsahern@...il.com>,
	Namhyung Kim <namhyung@...nel.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	linux-kernel@...r.kernel.org, Wang Nan <wangnan0@...wei.com>
Subject: Re: [BUG] perf cross-compile error dual to fixdep not host-exe

On Wed, Sep 30, 2015 at 11:18:20AM +0800, He Kuang wrote:
> Hi,
> 
> perf cross-compile error dual to fixdep is not a host executable, first bad commit
> is 7c422f557266("tools build: Build fixdep helper from perf and basic libs")
> 
> Cross-compiling an aarch64 target on x86_64 host, error like this:
> 
>   $ make ARCH=aarch64 O=xx/aarch64 CROSS_COMPILE=aarch64-linux-gnu
>   ...
>   make[3]: *** [xx/aarch64/parse-utils.o] Error 126
>   make[3]: *** Waiting for unfinished jobs....
>   /bin/sh: xx/aarch64//fixdep: cannot execute binary file
> 
>   $ uname -a
>   x86_64 x86_64 x86_64 GNU/Linux
> 
>   $ file xx/aarch64//fixdep
>   xx/aarch64//fixdep : ELF 64-bit LSB executable, ARM aarch64, version 1
>   (SYSV), dynamically linked, interpreter /lib/ld-linux-aarch64.so.1, for
>   GNU/Linux 3.7.0, not stripped

hum, we need fixdep to stay the host arch.. I should have seen it :-\
could you please check attached patch?

thanks,
jirka


---
diff --git a/tools/build/Makefile b/tools/build/Makefile
index a93036272d43..648897694992 100644
--- a/tools/build/Makefile
+++ b/tools/build/Makefile
@@ -5,15 +5,6 @@ endif
 
 include $(srctree)/tools//scripts/Makefile.include
 
-define allow-override
-  $(if $(or $(findstring environment,$(origin $(1))),\
-            $(findstring command line,$(origin $(1)))),,\
-    $(eval $(1) = $(2)))
-endef
-
-$(call allow-override,CC,$(CROSS_COMPILE)gcc)
-$(call allow-override,LD,$(CROSS_COMPILE)ld)
-
 ifeq ($(V),1)
   Q =
 else
--
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