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
Although the fs are built for openvz I've used them for UML, LXC.
On Tue, Aug 6, 2013 at 7:51 PM, Michael Richardson <firstname.lastname@example.org> wrote:
Well, you have to install the things you need then.
Han <email@example.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.
I make sure I have the same operating system and 32/64-bit-ness, and I use
> 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?
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.It's part of the rootfs, and you have a complete operating system there.
> 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?
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.
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