[ovs-dev] Bug#659685: fails to build the kernel module

[Thomas Goirand]

Package: openvswitch-datapath-dkms
Version: 1.4.0-1
Severity: grave

Hi there!

First, thanks for maintaining OVS, this is a very nice software, which
I will use with XCP (for which I'm working on the packaging, together
with people from Citrix).

Now, the less nice stuff... :)

openvswitch-datapath-dkms fails to build its kernel module when I tried
to install it in SID. Here's the relevant log:

Building module:
cleaning build area....(bad exit status: 2)
./configure --with-linux=/usr/src/linux-headers-3.1.0-1-686-pae ; make -C datapath/linux......(bad exit status: 2)
Error! Bad return status for module build on kernel: 3.1.0-1-686-pae (i686)
Consult /var/lib/dkms/openvswitch/1.4.0/build/make.log for more information.

and the make.log contains:

make: Entering directory `/var/lib/dkms/openvswitch/1.4.0/build/datapath/linux'
make: *** No targets specified and no makefile found.  Stop.
make: Leaving directory `/var/lib/dkms/openvswitch/1.4.0/build/datapath/linux'

I believe that the step building the Makefile was never run (but I didn't
investigate more and used the module-assistant version). Indeed:

root@<hostname>:~# ls /var/lib/dkms/openvswitch/1.4.0/build/datapath/linux
compat  Kbuild.in  Makefile.in  Makefile.main.in  Modules.mk

If I add in debian/dkms.conf.in something like this:
-MAKE="./configure --with-linux=/usr/src/linux-headers-`uname -r` ; make -C datapath/linux"
+MAKE="./configure --with-linux=/usr/src/linux-headers-`uname -r` ; cp datapath/linux/Makefile.in datapath/linux/Makefile ; cp datapath/linux/Makefile.main.in datapath/linux/Makefile.main ; make -C datapath/linux"

then I have further errors:

checking for Linux source directory... configure: error: cannot find source directory (please use --with-linux-source)
make: Entering directory `/var/lib/dkms/openvswitch/1.4.0/build/datapath/linux'
Makefile.main:8: @abs_srcdir@/../Modules.mk: No such file or directory
Makefile.main:9: @abs_srcdir@/Modules.mk: No such file or directory
Makefile.main:55: *** Linux kernel source not configured - missing
version.h.  Stop.
make: Leaving directory `/var/lib/dkms/openvswitch/1.4.0/build/datapath/linux'

Note that *I do* have linux-headers-3.1.0-1-686-pae,
linux-headers-3.1.0-1-common and linux-kbuild-3.1 installed on my server,
so it should be able to find what it needs. I used 3.1 because 3.2 just
crashes when I boot with it, but as I wanted to make sure, I also tried
to install and run Linux 3.2, and the issue was the same (so it's not a
Debian Linux 3.1 kernel specific issue, it's really general, and also is
present when running with latest 3.2 kernel in SID).

This "makes the package unusable", which in Debian books is an RC bug.
A fix correcting this issue ASAP would be really appreciated. :)

Cheers,

Thomas Goirand (zigo)