Re: [media-ctl][PATCHv2 3/4] libmediactl: use udev conditionally to get a devname

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Hi Andy,

On Friday 02 September 2011 10:42:06 Andy Shevchenko wrote:
> On Tue, 2011-08-30 at 21:14 +0200, Laurent Pinchart wrote:
> > > +AC_ARG_WITH([libudev],
> > > +    AS_HELP_STRING([--without-libudev],
> > > +        [Ignore presence of libudev and disable it]))
> > > +
> > > +AS_IF([test "x$with_libudev" != "xno"],
> > > +    [PKG_CHECK_MODULES(libudev, libudev, have_libudev=yes,
> > > have_libudev=no)],
> > > +    [have_libudev=no])
> > 
> > I don't think this works when cross-compiling.
> 
> Do you mean pkg-config call?
> Its manual tells us about PKG_CONFIG_SYSROOT_DIR which might be helpful.

If I don't set that, pkg-config seems to pick libudev from the host and 
consider that libudev is available. Compilation then fails.

As most users cross-compile libmediactl, I would like to avoid this situation. 
Requiring the user to set PKG_CONFIG_SYSROOT_DIR to habe libudev support is 
fine, but I would like the build to succeed out of the box when cross-
compiling without libudev support. Is that possible ?

-- 
Regards,

Laurent Pinchart
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