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

[He Kuang]

hi, Jirka

On 2015/9/30 14:13, Jiri Olsa wrote:
> 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

It does not work, 'fixdep' still be compiled as target executable.

Thank you.

> ---
> 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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