Re: [uml-user] how to build programs for running in UML

[Michael R. <mc...@sa...>]

Han <kee...@gm...> 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".

    > 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.

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