Re: [PATCH] Documentation: ptp: Fix build failure on MIPS cross builds

[David Daney]

On 10/21/2014 09:35 AM, David Miller wrote:
> From: Richard Cochran <richardcochran@xxxxxxxxx>
> 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.

We cross compile things successfully all the time for all the various 
MIPS ABIs.

It is a simple matter of having the Makefile setup for cross compiling.

What I don't understand is why we are using hostprogs in this Makefile. 
 Isn't this a program that would run on the target, not the build host?

David Daney
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