# Liblo.dll needed for plosc package

**URL:** <https://swi-prolog.discourse.group/t/liblo-dll-needed-for-plosc-package/9247>\
**Category:** Help!\
**Created:** [September 4, 2025, 7:33am UTC](https://swi-prolog.discourse.group/t/liblo-dll-needed-for-plosc-package/9247 "2025-09-04T07:33:14Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Remifa](https://yyz2.discourse-cdn.com/free1/user_avatar/swi-prolog.discourse.group/remifa/32/5706_2.png) [@Remifa](https://swi-prolog.discourse.group/u/Remifa)\
**Post date:** [September 4, 2025, 7:33am UTC](https://swi-prolog.discourse.group/t/liblo-dll-needed-for-plosc-package/9247/1 "2025-09-04T07:33:14Z")

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Hi

I was planning to use the plosc package ( ["plosc" pack for SWI-Prolog](https://www.swi-prolog.org/pack/list?p=plosc) ) in SWI Prolog, but it seems that I also need a liblo.dll and I can’t find it. Can someone please help me?

Thanks in advance  
Remifa

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<div class="post-metadata">

**Author:** ![Remifa](https://yyz2.discourse-cdn.com/free1/user_avatar/swi-prolog.discourse.group/remifa/32/5706_2.png) [@Remifa](https://swi-prolog.discourse.group/u/Remifa)\
**Post date:** [February 6, 2026, 8:35am UTC](https://swi-prolog.discourse.group/t/liblo-dll-needed-for-plosc-package/9247/3 "2026-02-06T08:35:56Z")

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I can’t find a precompiled version of the liblo.dll for Windows 10/11 (64-bit).

I prefer not to compile from source myself, unless I get clear step-by-step instructions and I get it compiled in a few minutes not hours. I don’t have any compilers or similar tools on my PC.

Would someone be so kind to share his/her compiled liblo.dll with me?

Thanks in advance  
Remifa

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<div class="post-metadata">

**Author:** ![EricGT](https://avatars.discourse-cdn.com/v4/letter/e/f1d935/32.png) [@EricGT](https://swi-prolog.discourse.group/u/EricGT)\
**Post date:** [February 6, 2026, 10:34am UTC](https://swi-prolog.discourse.group/t/liblo-dll-needed-for-plosc-package/9247/4 "2026-02-06T10:34:54Z")

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> [@Remifa](#):
>
> need a liblo.dll and I can’t find it

Are you aware of Microsoft’s [vcpkg](https://vcpkg.io/en/index.html)?

This was my first time hearing about **liblo** , so I did a quick search for it in vcpkg and found the following package:

> **[vcpkg package - liblo](https://vcpkg.io/en/package/liblo)**
>
> Explore vcpkg libraries to install

* * *

> [@Remifa](#):
>
> I prefer not to compile from source myself

At present, the only way I know to integrate code from vcpkg into a Windows build of SWI-Prolog is to build SWI-Prolog itself using CMake. The full build process takes me about 20 minutes, but the initial setup can easily take an hour or more, since vcpkg, the MSVC command-line tools, CMake, Git, and other build tools all need to be installed and configured.

To get `liblo.dll` working, there would need to be a way to connect SWI-Prolog to `liblo.dll`. I did find

> **["plosc" pack for SWI-Prolog](https://www.swi-prolog.org/pack/list?p=plosc)**

but beyond knowing that it exists, I don’t have any further details.

* * *

For an example of the Windows build steps I am referring to, see:

> [@Windows native build with ASan - Claude AI notes: ASan found a heap-use-after-free bug](https://swi-prolog.discourse.group/t/windows-native-build-with-asan-claude-ai-notes-asan-found-a-heap-use-after-free-bug/9500/27):
>
> Status update Using x64 Native Tools Command Prompt for VS Terminal C:\dev-MSVC-PR\swipl-devel\build\>swipl --version Expected result: 'swipl' is not recognized as an internal or external command, operable program or batch file. Note: If swipl is on the Windows PATH it could potentially cause problems as there will be two executables on the same machine. By removing swipl from the Windows Path, absolute paths are needed. set PATH=%PATH:C:\Program Files\swipl\bin;=% …