bug#38513: [PATCH] gnu: Remove uses of deprecated Qemu "-nic, model=foo" invokations.

[Marius Bakke <mbakke@fastmail.com>]

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Ludovic Courtès <ludo@gnu.org> writes:

> Hi!
>
> Marius Bakke <mbakke@fastmail.com> skribis:
>
>> * gnu/build/vm.scm (load-in-linux-vm): Move Qemu network configuration from
>> ARCH-SPECIFIC-FLAGS to the Qemu command line.  Use the "-nic" option of Qemu
>> instead of "-device" and "-net".
>> * gnu/system/vm.scm (common-qemu-options): Change "-net nic ..." to "-nic user ...".
>> * doc/guix.texi (Installing Guix in a VM, Running Guix in a VM): Adjust
>> examples accordingly.
>
> Apart from the typo Leo noted, it LGTM!  :-)

I discovered a problem with our documentation when researching this
patch.  Qemu nowadays, with no "-nic" or related arguments, acts the
same as "-nic,model=e1000e".  So a full network is available by default,
unless one adds "-nic none".

The "Running Guix in a VM" section of the manual mentions Qemu
networking twice, and both are inaccurate or wrong.  It would be good to
reword that section.  Any takers?  :-)

In any case this patch will be pushed shortly.

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