[Buildroot] libusb / udev support issue when using systemd and raspberrypi_defconfig

[Buildroot] libusb / udev support issue when using systemd and raspberrypi_defconfig

[Eric Limpens]

Hi,

 I'ld like to use systemd as init system on a RaspberryPi. Following these
steps, libusb complains about the lack of udev support (missing libudev):

git clone git://git.busybox.net/buildroot
make raspberrypi_defconfig
make menuconfig
 --> select glibc as C library
 --> select systemd as init system
 --> select package libusb
make

Is this a glitch with setting one of the BR2_PACKAGE_HAS_UDEV or
BR2_PACKAGE_PROVIDERS_UDEV variables?

Eric
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[Buildroot] libusb / udev support issue when using systemd and raspberrypi_defconfig

[Eric Le Bihan]

Hi Eric!

On Wed, Mar 26, 2014 at 09:45:17AM +0100, Eric Limpens wrote:
>    Hi,
>     I'ld like to use systemd as init system on a RaspberryPi. Following these
>    steps, libusb complains about the lack of udev support (missing libudev):
>    git clone git://git.busybox.net/buildroot
>    make raspberrypi_defconfig
>    make menuconfig
>     --> select glibc as C library
>     --> select systemd as init system
>     --> select package libusb
>    make
>    Is this a glitch with setting one of the BR2_PACKAGE_HAS_UDEV or
>    BR2_PACKAGE_PROVIDERS_UDEV variables?
I reproduced your bug. It is not a glitch with systemd being a provider for
the virtual package udev, but a linking issue.

If you look at output/build/libusb-1.0.18/config.log, you will see that the
configure script fails to detect libudev because of this:

 <...>/output/host/usr/arm-buildroot-linux-gnueabi/sysroot/usr/lib/libudev.so:  undefined reference to `__res_search'
 <...>/output/host/usr/arm-buildroot-linux-gnueabi/sysroot/usr/lib/libudev.so:  undefined reference to `__res_query'

These symbols are provided by libresolv.so. Since systemd 209, some
convenience libraries have been merged into libsystemd, which pulls this
-lresolv dependency.

See this `discussion
<http://lists.freedesktop.org/archives/systemd-devel/2014-March/017923.html>`_
on system-devel mailing list for more details, as well as this `Gentoo bug report
<https://bugs.gentoo.org/show_bug.cgi?id=504700>`_ for further details.

This issue is fixed in system 212, which has been released today! I will soon
post a patch to bump this package.

Best regards,
ELB

[Buildroot] libusb / udev support issue when using systemd and raspberrypi_defconfig

[Eric Limpens]

Hi Eric!

Thanks for reproducing / resolving the issue. I'll do an update when an
updated package is pushed.

For now I force libusb to configure with --disable-udev, that way it builds
ok.

Sincerely,

Eric.



On Wed, Mar 26, 2014 at 2:46 PM, Eric Le Bihan <eric.le.bihan.dev@free.fr>wrote:

> Hi Eric!
>
> On Wed, Mar 26, 2014 at 09:45:17AM +0100, Eric Limpens wrote:
> >    Hi,
> >     I'ld like to use systemd as init system on a RaspberryPi. Following
> these
> >    steps, libusb complains about the lack of udev support (missing
> libudev):
> >    git clone git://git.busybox.net/buildroot
> >    make raspberrypi_defconfig
> >    make menuconfig
> >     --> select glibc as C library
> >     --> select systemd as init system
> >     --> select package libusb
> >    make
> >    Is this a glitch with setting one of the BR2_PACKAGE_HAS_UDEV or
> >    BR2_PACKAGE_PROVIDERS_UDEV variables?
> I reproduced your bug. It is not a glitch with systemd being a provider for
> the virtual package udev, but a linking issue.
>
> If you look at output/build/libusb-1.0.18/config.log, you will see that the
> configure script fails to detect libudev because of this:
>
>  <...>/output/host/usr/arm-buildroot-linux-gnueabi/sysroot/usr/lib/libudev.so:
>  undefined reference to `__res_search'
>  <...>/output/host/usr/arm-buildroot-linux-gnueabi/sysroot/usr/lib/libudev.so:
>  undefined reference to `__res_query'
>
> These symbols are provided by libresolv.so. Since systemd 209, some
> convenience libraries have been merged into libsystemd, which pulls this
> -lresolv dependency.
>
> See this `discussion
> <
> http://lists.freedesktop.org/archives/systemd-devel/2014-March/017923.html
> >`_
> on system-devel mailing list for more details, as well as this `Gentoo bug
> report
> <https://bugs.gentoo.org/show_bug.cgi?id=504700>`_ for further details.
>
> This issue is fixed in system 212, which has been released today! I will
> soon
> post a patch to bump this package.
>
> Best regards,
> ELB
>
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