[ovs-discuss] Unable to configure the linux kernel module

[Ben Pfaff]

Well, then you need to install the kernel headers.  Whatever you think
you've got, isn't there.

On Wed, Apr 04, 2012 at 05:41:33PM -0400, ANAND AKELLA wrote:
> Hi Ben,
> The folder is empty.
> 
> ubuntu3:/mnt# ls -la
> total 8
> drwxr-xr-x  2 root root 4096 2010-04-23 04:23 .
> drwxr-xr-x 28 root root 4096 2012-04-04 10:09 ..
> ubuntu3:/mnt#
> 
> Thanks,
> Anand
> 
> On Wed, Apr 4, 2012 at 5:32 PM, Ben Pfaff <blp at nicira.com> wrote:
> 
> > On Wed, Apr 04, 2012 at 05:23:31PM -0400, ANAND AKELLA wrote:
> > > I using the latest openvswitch-1.4.0 software on ubuntu v11.10 Utah
> > emulab
> > > node. When I try to configure the Linux kernel module it gives the
> > > following error
> > >
> > > ubuntu3:~/openvswitch-1.4.0# sudo ./configure
> > > --with-linux=/lib/modules/`uname -r`/build
> > > checking build number... none
> > > checking for a BSD-compatible install... /usr/bin/install -c
> > > !
> > > !
> > > checking target hint for cgcc... x86_64
> > > checking whether make has GNU make $(if) extension... yes
> > > checking for Linux build directory... no
> > > configure: error: source dir /lib/modules/2.6.38.7-1.0emulab/build
> > doesn't
> > > exist
> > >
> > > ubuntu3:~/openvswitch-1.4.0# ls -l  /lib/modules/2.6.38.7-1.0emulab/build
> > > lrwxrwxrwx 1 root root 24 2011-08-24 12:51
> > > /lib/modules/2.6.38.7-1.0emulab/build -> /mnt/linux-source-2.6.38
> > >
> > > I went through couple of threads in openvswitch archive,as per the
> > > discussion I tried to run the following command but I'm facing the same
> > > issue.
> > >
> > > ubuntu3:~/openvswitch-1.4.0# sudo apt-get install linux-headers-`uname
> > -r`
> > > Reading package lists... Done
> > > Building dependency tree
> > > Reading state information... Done
> > > linux-headers-2.6.38.7-1.0emulab is already the newest version.
> > > 0 upgraded, 0 newly installed, 0 to remove and 1 not upgraded.
> > >
> > > ubuntu3:~/openvswitch-1.4.0# sudo ./configure
> > > --with-linux=/lib/modules/`uname -r`/build
> > > checking build number... none
> > > checking for a BSD-compatible install... /usr/bin/install -c
> > > !
> > > !
> > > checking target hint for cgcc... x86_64
> > > checking whether make has GNU make $(if) extension... yes
> > > checking for Linux build directory... no
> > > configure: error: source dir /lib/modules/2.6.38.7-1.0emulab/build
> > doesn't
> > > exist
> > >
> > > Please let me know if I'm missing something.
> >
> > The kernel source code, apparently.
> >
> > What's in /mnt/linux-source-2.6.38?
> >