On Tuesday, February 23, 2016 02:26:09 PM Linus Walleij wrote:
> On Tue, Feb 23, 2016 at 8:54 AM, Markus Pargmann <mpa@pengutronix.de> wrote:
> 
> > Add include paths to the Makefile so that linux/gpio.h can be found even
> > on systems without this header.
> >
> > Signed-off-by: Markus Pargmann <mpa@pengutronix.de>
> (...)
> > -CFLAGS += -Wall -g -D_GNU_SOURCE
> > +CFLAGS += -Wall -g -D_GNU_SOURCE -I ../include -I ../../include/uapi
> 
> This is probably not how userspace compilation is supposed
> to work. The way I understand it, userspace programs from tools/*
> should be compiled like this:
> 
> make headers_install ARCH=foo INSTALL_HDR_PATH=<bar>
> cd tools/gpio
> make CFLAGS="$CFLAGS -I<bar>"
> 
> The reason being that UAPI files can differ after install depending
> on arch.

I see, thanks for explaining.

Best Regards,

Markus

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