[oe] libusb and libusb-compat: conflict

[Matt Darland]

FYI, libusb1 is broken on 2.6.26 kernels. If it tries to use sysfs, then it 
will expect every USB device to have a 'descriptors' file in sysfs, but that 
isn't necessarily the case in recent kernels.

http://sourceforge.net/mailarchive/message.php?msg_name=20080731112725.55310%40gmx.net


On Wednesday 10 September 2008 08:24:37 am Mike (mwester) wrote:
> Koen Kooi wrote:
> ...
>
> > Some background: libusb1 is the rewrite of libusb which brings up
> > goodness as better performance and more powersaving, but its ABI is
> > incompatible with libusb. That is why the libusb people create
> > libusb-compat, it's a drop-in replacement for libusb.
> >
> > When I added it to OE I made sure the runtime situation worked and
> > changed all packages to libusb-compat. It seems I missed a few.
>
> Grep comes up with a bunch, but probably a lot of those are just older
> recipes -- dfu-util and openocd are definitely broken, though.
>
> > It should be safe to change everything over to libusb-compat, unless
> > your favourite apps abuses private libusb API (as gnuradio does).
>
> I encountered simple linker failures (symbols not found).  I'll get rid
> of libusb out of staging entirely and see if dfu-util and openocd will
> link correctly against libusb-compat.  I can test dfu-util, but I hope
> someone else can test openocd.
>
> > And there's no such thing as CONFLICTS in OE, only RCONFLICTS.
>
> Bummer.  That would mean that we would need to switch to
> "virtual/libusb" I guess.  That seems a lot of effort for something
> that's obsolete -- it might be better to warn people if libusb is being
> built instead of libusb-compat.  I wonder if this might be a use case
> for a "WARNING" metadata item in a bitbake recipe.
>
> I will do nothing with any metadata then except attempt to build
> dfu-util and openocd with libusb-compat.
>
> > regards,
> >
> > Koen
>
> Mike (mwester)
>
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