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yum dnf install make cmake binutils-devel SDL2-devel SDL2_ttf-devel nettle-devel spice-protocol fontconfig-devel libX11-devel egl-wayland-devel wayland-devel mesa-libGLU-devel mesa-libGLES-devel mesa-libGL-devel mesa-libEGL-devel libXfixes-devel libXi-devel
typo
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</syntaxhighlight >
<syntaxhighlight lang=bash>
zypper install make cmake binutils-devel libSDL2-devel libSDL2_ttf-devel libnettle-devel nettle spice-protocol-devel fontconfig-devel libX11-devel libconfig-devel libwayland-egl-devel libX11fixeslibXi-devel
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===== Arch Linux / Manjaro =====
<syntaxhighlight lang=bash>
pacman -Syu binutils-dev sdl2 sdl2_ttf libx11 nettle fontconfig cmake fonts-freefont-ttf libsdl2-dev libsdl2-ttf-dev libspicespice-protocolgnu-dev bfontconfig1free-dev libx11-dev nettle-devfonts
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<syntaxhighlight lang=bash>
xbps-install -Syu binutils-devel cmake freefont-ttf SDL2-devel SDL2_ttf-devel spice-protocol fontconfig-devel libX11-devel nettle-devel
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===== Gentoo =====
First set up the necessary USE flags if needed:
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echo "media-libs/libsdl2 gles2" >> /etc/portage/package.use/libsdl2
echo "media-libs/nettle gmp" >> /etc/portage/package.use/nettle
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Then fetch the packages:
<syntaxhighlight lang=bash>
emerge sys-devel/binutils media-libs/libsdl2 media-libs/sdl2-ttf dev-libs/nettle media-libs/fontconfig dev-util/cmake app-emulation/spice-protocol media-fonts/freefonts media-libs/glu
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This list can also be placed into a setfile in /etc/portage/sets/ so that they can be updated with
<syntaxhighlight lang=bash>
emerge @setfile
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Either visit the site at [https://looking-glass.hostfission.com/downloads Looking Glass Download Page]
Or pull the lastest '''bleeding-edge version''' using the '''git''' command. '''Note: If you are using the latest bleeding-edge from the master branch you MUST download/use the corresponding host application'''
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git clone --recursive https://github.com/gnif/LookingGlass.git
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</syntaxhighlight>
;NOTE: The most common compile error is related to backtrace support this . This can be disabled by adding the following option to the cmake command. : '''-DENABLE_BACKTRACE=0''', however, if you disable this and need support for a crash please be sure to use gdb to obtain a backtrace manually or there is nothing that can be done to help you.
Should this all go well you should be left with the file '''looking-glass-client'''. Before you run the client you will first need to configure either Libvirt or Qemu (whichever you prefer) and then set up the Windows side service.
You can call the client from the build directory; or, you can make it callable generally by adding the directory to your path or issuing
<syntaxhighlight lang=bash>
ln -s $(pwd)/looking-glass-client /usr/local/bin/
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from the build directory.
=== libvirt Configuration ===
If you want clipboard synchronization please see [[FAQ#How to enable clipboard synchronization via SPICE]]
==== AppArmor ====
For libvirt versions before '''5.10.0''', if you are using AppArmor, you need to add permissions for QEMU to access the shared memory file. This can be done by adding the following to ''/etc/apparmor.d/abstractions/libvirt-qemu''.
/dev/shm/looking-glass rw,
=== Qemu Commands ===
----
Windows will not prompt for a driver for the IVSHMEM device, instead, it will use a default null (do nothing) driver for the device. To install the IVSHMEM driver you will need to go into the device manager and update the driver for the device "PCI standard RAM Controller" under the "System Devices" node.
'''French:''' "Gestionnaire de périphérique" -> "Périphériques Système" -> "Contrôleur de RAM Standard PCI"
'''English:''' "Device Manager" -> "System Devices" -> "PCI standard RAM Controller"
A signed Windows 10 driver can be obtained from Red Hat for this device from the below address:
Using IVSHMEM with Scream may interfere with Looking Glass as it may try to use the same device. Please do not use the IVSHMEM plugin for Scream. Use the default network transfer method. The IVSHMEM method induces additional latency that is built into its implementation. When using VirtIO for a network device the VM is already using a highly optimized memory copy anyway so there is no need to make another one.
If you insist on using IVSHMEM for Scream despite it's its inferiority to the default network implementation the Windows Host Application can be told what device to use. Create a looking-glass-host.ini file in the same directory as the looking-glass-host.exe file. In it, you can use the os:shmDevice option like so:
<syntaxhighlight lang=INI>
The windows host application captures the windows desktop and stuffs the frames into the shared memory via the shared memory virtual device, without this Looking Glass will not function. It is critical that the version of the host application matches the version of the client application, as differing versions can be, and usually are, incompatible.
'''Note:''' As of 2020-08-12 (commit dc4d1d49fac2361e60c9bb440bc88ce05f6c1cbd), the below instructions are deprecated. The host application now has an installer that installs a system-wide service to run the Looking Glass host application. When upgrading please be sure to remove the scheduled task if you have already created one.
To get the Windows-Host-Application running after restart you need to run it as a privileged task we do that by starting '''cmd.exe''' as '''administrator''' and running a command in it which creates a windows task.
'''Note:''' At this time the Looking Glass host does not support running under unprivileged users. Your user account must have administrator privileges for the windows task to function.
<syntaxhighlight lang=batch>
SCHTASKS /Create /TN "Looking Glass" /SC ONLOGON /RL HIGHEST /TR C:\Users\<YourUserName>\<YourPath>\looking-glass-host.exe
https://github.com/gnif/LookingGlass/blob/master/client/README.md
Common options include '-s' for disabling spice, '-S' for disabling the screen saver, and '-F' to automatically enter full screen and '-k' to disable the UPS/FPS rate.
