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Bug 922376 - app-emulation/virtualbox: Ability to disable 32-bit support in virtualbox is missing
Summary: app-emulation/virtualbox: Ability to disable 32-bit support in virtualbox is ...
Alias: None
Product: Gentoo Linux
Classification: Unclassified
Component: Current packages (show other bugs)
Hardware: All Linux
: Normal normal (vote)
Assignee: Viorel Munteanu
Depends on:
Reported: 2024-01-18 12:34 UTC by Mark
Modified: 2024-05-25 09:53 UTC (History)
1 user (show)

See Also:
Package list:
Runtime testing required: ---


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Description Mark 2024-01-18 12:34:26 UTC
I am currently using kernel 6.7.0 and virtualbox 7.0.12. As the 7.0.14 update for virtualbox came in, I found that the configure step exits with an error:

Checking for 32-bit support: 
  Cannot execute 32-bit applications! Either enable 32-bit support in the
  kernel configuration or use --disable-vmmraw to disable 32-bit guests.

But it is not a 7.0.14 issue, 7.0.12 also gets this error with kernel 6.7.0 (so my virtualbox installation is older than the kernel).

Kernel 6.7 changed the 32bit support behaviour, see and

My kernel allows 32bit emulation but disables it by default as I want to ensure there is no 32bit legacy left, here is the snippet from the kernel .config file:


I modified the ebuild and added --disable-vmmraw to src_configure() and virtualbox was able to build (and run openSUSE 15.5).

It may be a good idea to add a USE-flag to utilize the vmraw option and check the kernel settings to warn if the flag is not used:

- if emulation is not available, the flag is required and the ebuild can fail "ex-ante"
- if emulation is available but deactivated, either the flag is required or the emulation should be activated and a warning is helpful to guide the user to a solution
- if the flag is set but emulation is available and enabled, a notice should tell that the build will not use 32bit emulation though the kernel supports it

The option --disable-vmraw itself seems to be quite old, I found a google hit from about 11 years ago. It seems there is a use case now :-)

Reproducible: Always

Steps to Reproduce:
1. Use a 6.7.0 kernel without 32bit emulation enabled or disabled 32bit support
2. emerge virtualbox, e.g. version 7.0.14
Comment 1 Larry the Git Cow gentoo-dev 2024-05-25 09:53:11 UTC
The bug has been closed via the following commit(s):

commit 14674f7dbb371b69cf99edf98aa6434405b96f75
Author:     Viorel Munteanu <>
AuthorDate: 2024-05-25 09:08:13 +0000
Commit:     Viorel Munteanu <>
CommitDate: 2024-05-25 09:52:42 +0000

    app-emulation/virtualbox: add use flag for IA32 support
    Signed-off-by: Viorel Munteanu <>

 app-emulation/virtualbox/metadata.xml                | 11 ++++++-----
 app-emulation/virtualbox/virtualbox-7.0.18-r1.ebuild |  3 ++-
 2 files changed, 8 insertions(+), 6 deletions(-)