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To:     richardcochran@gmail.com
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Subject: Re: [PATCH] Documentation: ptp: Fix build failure on MIPS cross
 builds
From:   David Miller <davem@davemloft.net>
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From: Richard Cochran <richardcochran@gmail.com>
Date: Tue, 21 Oct 2014 13:07:25 +0200

> On Mon, Oct 20, 2014 at 09:42:18AM +0100, Markos Chandras wrote:
>> diff --git a/Documentation/ptp/Makefile b/Documentation/ptp/Makefile
>> index 293d6c09a11f..397c1cd2eda7 100644
>> --- a/Documentation/ptp/Makefile
>> +++ b/Documentation/ptp/Makefile
>> @@ -1,5 +1,15 @@
>>  # List of programs to build
>> +ifndef CROSS_COMPILE
>>  hostprogs-y := testptp
>> +else
>> +# MIPS system calls are defined based on the -mabi that is passed
>> +# to the toolchain which may or may not be a valid option
>> +# for the host toolchain. So disable testptp if target architecture
>> +# is MIPS but the host isn't.
>> +ifndef CONFIG_MIPS
>> +hostprogs-y := testptp
>> +endif
>> +endif
> 
> It seems like a shame to simply give up and not compile this at all.
> Is there no way to correctly cross compile this for MIPS?

Yeah seriously, we should try to make this work instead of throwing our
hands in the air.