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Thomas Frohwein proposed a Wine port for OpenBSD on the openbsd-ports mailing list on Oct. 18, 2026. The draft has run dozens of 64-bit Windows programs in testing, but 32-bit applications do not work, built-in tests remain disabled, and the port is still being worked on.
OpenBSD developer Thomas Frohwein has proposed a port of Wine, the compatibility software that runs Windows applications on other operating systems, reporting that dozens of 64-bit Windows programs have worked in tests. The proposal could broaden the software available to OpenBSD users, but the port is still a draft: 32-bit Windows programs do not run, and Frohwein warned that testers should proceed at their own risk.
Frohwein announced the proposed port in a message to the openbsd-ports mailing list on Oct. 18. He described the work as a collective effort and credited developers Andrii and Fabien with much of the technical work. The port addresses an OpenBSD limitation involving the processor’s %gs register base: Frohwein said the implementation emulates the %gs prefix on commands rather than setting the register base directly.
According to Frohwein, developers have tested several dozen 64-bit Windows programs, mostly successfully. He cited Notepad++ as a relatively small program for people who want to test the draft. He also reported that the remastered version of The Witcher 3, which he said had been released the previous month, ran with the port when paired with vkd3d-proton, as described in the port’s README. Screenshots and livestream recordings were linked in the mailing-list post; these are examples supplied by the project, not independent compatibility testing.
The current port does not support WoW64, the compatibility mechanism needed for running 32-bit Windows software in this setup. Frohwein said 32-bit applications are therefore a “no-op.” He also said Wine’s built-in tests are disabled: they require access to an X server, and multiple tests still hang. He noted that those hangs had not appeared in the real-world testing cited in his message, but that distinction does not establish that the port is reliable across a broader range of programs or systems.
A New Route for Windows Software
If the port develops into a usable package, it could let OpenBSD users run some Windows applications without switching to a Windows installation or another operating system. The reported results are especially relevant for 64-bit software, as Frohwein said more Windows programs have moved to 64-bit since earlier efforts to bring Wine to OpenBSD.
The practical reach remains limited. The absence of WoW64 rules out 32-bit programs, while the disabled test suite leaves maintainers without a fully working automated check of Wine’s behavior. The examples in the announcement indicate progress, but they do not amount to a compatibility guarantee. Users should treat the proposal as experimental and weigh the developer’s run-at-your-own-risk warning before trying it.
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The Register Emulation Work
The port proposal followed earlier OpenBSD technical discussions about the %gs register-base problem. Frohwein said Andrii’s software-based approach—emulating the %gs prefix on commands—made the port possible. The mailing-list message also pointed to a separate discussion about interest in Wine on OpenBSD, suggesting the proposal responds to demand among users as well as a technical opportunity.
Frohwein linked to prior community posts with screenshots and to recordings showing selected programs. He recommended testing Notepad++’s 64-bit portable release as a straightforward starting point. The project’s README describes the additional vkd3d-proton component used for the Witcher 3 example. Those demonstrations document particular test cases; they do not establish broad support for Windows games, graphics features, or peripheral hardware.
“We have since tested several dozens of 64-bit Windows software, mostly successfully.”
— Thomas Frohwein, in his Oct. 18 openbsd-ports mailing-list post
64-bit Windows programs running on Linux
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Support and Safety Still Open
The announcement does not specify when the port might be ready for general use, whether it will be accepted into the OpenBSD ports tree, or which tested programs will be supported over time. It also does not give a complete test matrix covering OpenBSD versions, hardware, graphics drivers, or application compatibility. Frohwein’s description of dozens of mostly successful tests is a developer report, not a published independent evaluation.
Security containment is unresolved. Frohwein suggested using a separate, non-privileged account for testing while developers explore whether the software could be restricted, potentially with OpenBSD’s unveil mechanism. The post does not say that such fencing is already implemented. Wine’s own FAQ was linked for additional caution, but the announcement makes no claim that the proposed port has passed a security review.
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Testing Before Wider Availability
Frohwein asked the community to test the draft and contribute to its development. The immediate next steps are likely to involve continued compatibility work, investigation of the hanging built-in tests, and exploration of ways to limit the software’s access to the system. The post does not set a release date or promise when WoW64 support might be available.
People considering a trial can consult the port’s README and start with the suggested 64-bit Notepad++ example, while following the developer’s warning and using a separate unprivileged account. Any broader assessment will depend on further testing and updates from the port’s contributors.
OpenBSD software development tools
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Key Questions
What is the OpenBSD Wine port?
It is a proposed OpenBSD port of Wine, software that enables some Windows applications to run on other operating systems. The draft was described by Thomas Frohwein in a mailing-list post on Oct. 18, 2026.
Which Windows programs work with it?
Frohwein said several dozen 64-bit Windows programs had been tested, mostly successfully. He named Notepad++ as a suggested test and reported that the remastered Witcher 3 ran with vkd3d-proton. These are reported examples, not a guarantee that other programs will work.
Can it run 32-bit Windows applications?
No, not in its current state as described in the announcement. WoW64 is not working, so 32-bit Windows software does not run through the port.
Is the port ready for everyday use?
The announcement presents it as a draft still under development. Built-in tests are disabled, some tests hang, and Frohwein advises users to proceed at their own risk. The post does not announce a general-use release.
What precautions did the developer recommend?
Frohwein suggested using a separate, non-privileged account for testing. He said developers were exploring possible containment, potentially using OpenBSD’s unveil mechanism, but did not say that this protection was already in place.
Source: hn
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