How do I install QEMU 3.0 on Ubuntu 18.04?

Question

I am using a Ryzen processor and, as such, I have been told that I need to use QEMU 3.0 for the SMT patch.

The issue is that I cannot seem to find any way to install it on Ubuntu 18.04 LTS at all. It's not in the repositories, obviously; but, there are also no other PPAs or anything similar.

Solution

It seems that we need to compile QEMU 3.0.0 manually.

At first we remove version installed from official repository (if any):

sudo apt-get purge "qemu*"
sudo apt-get autoremove

We should start by installing its build-dependencies - at first enable Source Code repositories in Software and Updates (software-properties-gtk) and then:

sudo apt-get build-dep qemu

Then download it, configure and compile:

cd ~/Downloads
wget https://download.qemu.org/qemu-3.0.0.tar.xz
tar -xf qemu-3.0.0.tar.xz
cd qemu-3.0.0/
./configure
make

and then use checkinstall:

sudo apt-get install checkinstall
sudo checkinstall make install
sudo apt-get install ./*.deb

if you want to remove it - remove its packages as usual.

---

And as the result you will have QEMU 3.0.0 installed

$ qemu-system-x86_64 --version
QEMU emulator version 3.0.0
Copyright (c) 2003-2017 Fabrice Bellard and the QEMU Project developers

Comments

[GodOfPlutonium]

I ended up doing this but you should probably mention that on ubuntu you should use checkinstall instead of make install, because that packages it as a .deb and adds it to the package manager

[N0rbert]

You are completely right about checkinstall. New contributor badge forced me to lower my knowledge and skills ;)

[Jorrit]

In some shells sudo apt-get purge "qemu*" should be used with the quotes, or related packages will not be removed.