I was able to manually install more packages after the "debootstrap"
created the basic rootfs. Now I have a much more complete rootfs and was
able to run the programs I compiled earlier on the host.
thanks for all your help.
On Thu, Aug 8, 2013 at 8:56 AM, Tony Su <ton...@su-networking.com> wrote:
> If your rootfs is incomplete I've generally speculated it was designed to
> run on a similar Host and likely would need bind mounts.
>
> The following is where I get complete fs which can run independently on
> any Host
> Http://openvz.org/Download/template/precreated
>
> Although the fs are built for openvz I've used them for UML, LXC.
>
> HTH
> Tony
> On Aug 7, 2013 11:10 AM, "Han" <keepsim...@gmail.com> wrote:
>
>>
>>
>> On Tue, Aug 6, 2013 at 7:51 PM, Michael Richardson <m...@sandelman.ca>wrote:
>>
>>>
>>> Han <keepsim...@gmail.com> wrote:
>>> > I am trying to build and run some of my C programs in UML. One
>>> way I tried is
>>> > to build (i.e. compile) the program on the host, then run it in
>>> UML. The
>>> > problem is that the UML rootfs I used lacks many of the /usr/lib/
>>> shared
>>> > libraries, hence the program failed to run.
>>>
>>> Well, you have to install the things you need then.
>>>
>>> > My question is: what is the best practice to build and run C
>>> programs for UML?
>>> > Do people normally compile the program on the host and then run
>>> it in UML?
>>> > Or compile the program directly in UML and then run it?
>>>
>>> I make sure I have the same operating system and 32/64-bit-ness, and I
>>> use
>>> hostfs, and I use "make DESTDIR=/path/to/my/uml/instance install".
>>>
>>
>> [Han] in my case, the host is using a different linux kernel and
>> different 32/64-bit-ness. And I can't change that. And I also cannot
>> mount the UML rootfs (don't have permission) to add things from the host.
>>
>> the linux machine I used to build the UML rootfs is different from the
>> linux host that I run the UML.
>>
>>
>>>
>>> > If folks compile the C programs in UML directly, where the "gcc"
>>> comes from?
>>> > Is it built part of the rootfs, or some add-ons? Any pointers
>>> for that?
>>>
>>> It's part of the rootfs, and you have a complete operating system there.
>>> You use yum or apt or yast2 to install whatever you need.
>>>
>>
>> [Han] I don't have the network connection from inside the UML yet. Need
>> to set up that first and try to install things.
>>
>> thanks.
>>
>>
>>>
>>> --
>>> ] Never tell me the odds! | ipv6 mesh
>>> networks [
>>> ] Michael Richardson, Sandelman Software Works | network
>>> architect [
>>> ] m...@sandelman.ca http://www.sandelman.ca/ | ruby on
>>> rails [
>>>
>>>
>>
>>
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