Windows long-path linker issue

Issue type

Other type of issue

Description with steps to reproduce

If I clone the MuseScore repository in a path like D:\sources\MuseScore, the build directory will be named Win-Qt6.10.1-msvc2022_64-VS18-Debug, so the full path while linking notationscene_qml_tests will exceed the 256-character path limit on Windows.

Even if I try to remove this limit from Registry (by setting HKLM\SYSTEM\CurrentControlSet\Control\FileSystem\LongPathsEnabled=1) , the linking error stil occurs.

LINK : fatal error LNK1104: cannot open file '..\..\..\..\..\framework\uicomponents\qml\Muse\UiComponents\muse_uicomponents_qml_resources_2.dir\Debug\qrc_muse_uicomponents_qml_raw_qml_0_init.obj' [D:\sources\MuseScore\builds\Win-Qt6.10.1-msvc2022_64-VS18-Debug\src\notationscene\qml\MuseScore\NotationScene\tests\notationscene_qml_tests.vcxproj]

Supporting files, videos and screenshots

My proposition would be to shorten the build directory name from build.cmake file, that is currently set to set(BUILD_FOLDER "${PLATFORM}-Qt${QT_VERSION}-${QT_COMPILER}-${GEN_SHORT}-${BUILD_TYPE}"), or find another solution.

I tried cloning to a shorter path (D:\ms), but the error can still be seen.

If I shorten the BUILD_FOLDER name in the abovementioned variable to set(BUILD_FOLDER "${PLATFORM}-${BUILD_TYPE}"), linking works fine.

In which versions of MuseScore Studio is this issue present?

4.7

Regression

Yes, this used to work in a previous version of MuseScore 4.x

I did not have this issue in the past, maybe there were some changes to the trees where the notationscene_qml_tests resides or something.

Operating system

Windows 11

Additional context

-- Including personal build overrides
QMake version 3.1
Using Qt version 6.10.1 in D:/Qt/6.10.1/msvc2022_64/lib
-- QT_LOCATION: D:/Qt
-- QT_VERSION: 6.10.1
-- QT_COMPILER: msvc2022_64
-- SOURCE_PATH:       D:/sources/MuseScore
-- BUILD_PATH:        D:/sources/MuseScore/builds/Win-Qt6.10.1-msvc2022_64-VS18-Debug
-- INSTALL_PATH:      D:/sources/MuseScore/builds/Win-Qt6.10.1-msvc2022_64-VS18-Debug/install
-- MSCORE_EXECUTABLE: D:/sources/MuseScore/builds/Win-Qt6.10.1-msvc2022_64-VS18-Debug/install/bin/MuseScore4.exe
-- CPUS: 20
-- GENERATOR: Visual Studio 18 2026
-- BUILD_TYPE: Debug

~~~~ Actualizing Configure step ~~~~

**********************************************************************
** Visual Studio 2026 Developer Command Prompt v18.9.2
** Copyright (c) 2026 Microsoft Corporation
**********************************************************************
[vcvarsall.bat] Environment initialized for: 'x64'
-- Selecting Windows SDK version 10.0.26100.0 to target Windows 10.0.26200.
-- The C compiler identification is MSVC 19.51.36256.0
-- The CXX compiler identification is MSVC 19.51.36256.0

Checklist

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• I have verified that this issue has not been logged before, by searching the issue tracker for similar issues
• I have attached all requested files and information to this report
• I have attempted to identify the root problem as concisely as possible, and have used minimal reproducible examples where possible