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Zarhan
Veteran
Joined: 27 Feb 2004
Posts: 1011
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 Posted: Mon Apr 15, 2024 2:34 pm Post subject: Virtualbox and compiling qt 5.15.13 |
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As is well known, Virtualbox does not have proper support for AVX2.
I ran into this issue with qt 5.13 ages ago in topic https://forums.gentoo.org/viewtopic-t-1106432.html
Anyway, now I seem to be running into this again with qt 5.15.13. qt 5.15.12 was working fine. I can try masking 5.15.13 if nothing else works, but so far I've tried the following in make.conf:
| Code: |
COMMON_FLAGS="-march=native -O3 -pipe"
COMMON_FLAGS="-march=native -O3 -pipe -mno-avx2"
COMMON_FLAGS="-march=ivybridge -O3 -pipe"
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So, just running with -native, disabling AVX2 explicitly, and then using explicit arch that does not have AVX2.
None of them work. I still get something like this in build logs.
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cd /var/tmp/portage/dev-qt/qtbase-6.7.0-r1/work/qtbase-everywhere-src-6.7.0_build/src/gui && /usr/bin/cmake -E make_directory vulkan && /var/tmp/portage/dev-qt/qtbase-6.7.0-r1/work/qtbase-everywhere-src-6.7.0_build/lib64/qt6/libexec/qvkgen /var/tmp/portage/dev-qt/qtbase-6.7.0-r1/work/qtbase-everywhere-src-6.7.0/src/gui/vulkan/vk.xml /var/tmp/portage/dev-qt/qtbase-6.7.0-r1/work/qtbase-everywhere-src-6.7.0/src/gui/vulkan/generated_header.txt /var/tmp/portage/dev-qt/qtbase-6.7.0-r1/work/qtbase-everywhere-src-6.7.0_build/src/gui/vulkan/qvulkanfunctions
Incompatible processor. This Qt build requires the following features:
f16c |
Any thoughts?
This time, I could not mask them easily, because the older versions (5.15.12*) have been removed from portage. There are no other versions left! |
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Zarhan
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Joined: 27 Feb 2004
Posts: 1011
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| Posted: Thu Apr 18, 2024 9:48 am Post subject: |
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Ok, the solution was that in Virtualbox, I added directive to NOT expose AVX2 to the guest.
| Code: | | VboxManage setextradata <vm name> VboxInternal/CPUM/IsaExts/AVX2 0 |
With this, the /proc/cpuinfo stopped showing avx2 and software stopped trying to use it. |
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GentleFranl
n00b
Joined: 25 Apr 2024
Posts: 1
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| Posted: Thu Apr 25, 2024 9:12 pm Post subject: |
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Howdy! This Tutorial for the Virtualbox Installation works on Gentoo Linux? https://www.veuhoff.net/virtualbox-auf-debian-11-bullseye-installieren-anleitung would be nice if you can tell me this  |
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Zarhan
Veteran
Joined: 27 Feb 2004
Posts: 1011
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| Posted: Tue Apr 30, 2024 12:52 pm Post subject: |
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| I have no idea if you mean with Gentoo as a guest or host, but I've never needed any "install guides". For host, just, you know, emerge virtualbox and compile the kernel modules. For guest...well, just install from the ISO image and set your display as vboxvideo? |
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NeddySeagoon
Administrator
Joined: 05 Jul 2003
Posts: 54577
Location: 56N 3W
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| Posted: Tue Apr 30, 2024 1:34 pm Post subject: |
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GentleFranl,
Welcome to gentoo.
The first step will fail on Gentoo as it does not use Apt.
Use this Wiki page instead.
_________________
Regards,
NeddySeagoon
Computer users fall into two groups:-
those that do backups
those that have never had a hard drive fail. |
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