Re: [PATCH v2 0/3] tools/gpio: switch to tools buildsystem

[Alexandre Courbot <gnurou@xxxxxxxxx>]

On Sun, Jun 19, 2016 at 10:52 PM, Andy Shevchenko
<andriy.shevchenko@xxxxxxxxxxxxxxx> wrote:
> On Sun, 2016-06-19 at 22:07 +0900, Alexandre Courbot wrote:
>> On Sun, Jun 19, 2016 at 12:24 AM, Andy Shevchenko
>> <andriy.shevchenko@xxxxxxxxxxxxxxx> wrote:
>> > Current environment is not allowed to easily build the tools.
>> > Move to tools buildsystem to allow user build gpio tools using only
>> > existing
>> > kernel sources. Besides that support O=/path/to/build/dir option.
>>
>> Very good idea. I just have a few issues with the current patchset:
>>
>> 1) I think patch 1 and 2 should be merged, otherwise we would have one
>> commit where the GPIO tools are not available anymore
>
> No objection!
>
>> 2) When trying to cross-compile the tools, I am hitting the following
>> error:
>>
>>   arm-linux-gnueabihf-gcc -Wp,-MD,./.lsgpio.o.d,-MT,lsgpio.o -O2 -Wall
>> -g -D_GNU_SOURCE -Iinclude -D"BUILD_STR(s)=#s"   -c -o lsgpio.o
>> lsgpio.c
>>   arm-linux-gnueabihf-gcc -Wp,-MD,./.gpio-utils.o.d,-MT,gpio-utils.o
>> -O2 -Wall -g -D_GNU_SOURCE -Iinclude -D"BUILD_STR(s)=#s"   -c -o
>> gpio-utils.o gpio-utils.c
>>    ld -r -o lsgpio-in.o  lsgpio.o gpio-utils.o
>> lsgpio.o: error adding symbols: File in wrong format
>>
>> Looks like the host linker is invoked instead of the target one.
>
> Can you try to add
>
> LD = $(CROSS_COMPILE)ld
>
> into Makefile and re-run?

That fixes it, thanks! Will try again with the next revision.

This series makes me happy, I never found how to cross-compile the
GPIO tools with the previous Makefile...
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