#1113238 lmms: FTBFS with CMake 4

#1113238#5
Date:
2025-08-31 22:59:42 UTC
From:
To:
Dear maintainer,

During a test rebuild for CMake 4, lmms failed to rebuild.

Log Summary:
-------------------------------------------------------------------------------
[...]
JXGSFpGuChImFDWT5JS5ckZe6NJfhOq48iuzhOgWA6nM2D2DfLmufk4qp9xszQAB
qwIA6r4//EadJU0R4GOxvBWK2hrfL60lZ9nFbdkA9CctmlVJPEb9SK9NEgpuspLS
/BX8Wfs3iPIB1dbEWJFzkcZjkRPXxoI54ILTPB+qL7Ze0fWhMxibn2stA9C5fazP
o8z66uAwuvALhTQb6moulvJC19Y1h1nQCjmdaZsGE5cqdujn6CFXULCLrVvpdiFc
9V6pJJBCyaflToRjYB5oQ0FE4VNaD07B1yFWi5OIKjOs/h4Zy8hChr0D3lIVHJb6
6nkfJwSbt2OSE6DMpcB95S7EyzkhXj4/Qx5SqKjBNaBvxcrKerc=
=5J2c
-----END PGP SIGNATURE-----

dpkg-source: warning: cannot verify inline signature for ./lmms_1.2.2+dfsg1-6.dsc: no acceptable signature found
dpkg-source: info: extracting lmms in /build/reproducible-path/lmms-1.2.2+dfsg1
dpkg-source: info: unpacking lmms_1.2.2+dfsg1.orig.tar.xz
dpkg-source: info: unpacking lmms_1.2.2+dfsg1-6.debian.tar.xz
dpkg-source: info: using patch list from debian/patches/series
dpkg-source: info: applying spelling.patch
dpkg-source: info: applying 0003-use-c11-atomics-for-non-msvc-compilers-57.patch
dpkg-source: info: applying add_keywords_to_the_desktop_file.patch
dpkg-source: info: applying fix-qt-crash-kwidgetsaddons-5.101.0.patch

Check disk space
----------------

Sufficient free space for build

User Environment
----------------

APT_CONFIG=/var/lib/sbuild/apt.conf
HOME=/sbuild-nonexistent
LANG=C.UTF-8
LC_ALL=C.UTF-8
LOGNAME=sbuild
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games
SHELL=/bin/sh
USER=sbuild

dpkg-buildpackage
-----------------

Command: dpkg-buildpackage --sanitize-env -us -uc -b
dpkg-buildpackage: info: source package lmms
dpkg-buildpackage: info: source version 1.2.2+dfsg1-6
dpkg-buildpackage: info: source distribution unstable
dpkg-buildpackage: info: source changed by Petter Reinholdtsen <pere@hungry.com>
 dpkg-source --before-build .
dpkg-buildpackage: info: host architecture arm64
 debian/rules clean
dh clean
   dh_clean
 debian/rules binary
dh binary
   dh_update_autotools_config
   dh_autoreconf
   debian/rules override_dh_auto_configure
make[1]: Entering directory '/build/reproducible-path/lmms-1.2.2+dfsg1'
dh_auto_configure -- -DCONTRIBUTORS=/build/reproducible-path/lmms-1.2.2+dfsg1/doc/CONTRIBUTORS -DFORCE_VERSION=internal -DWANT_QT5=1 -DWANT_CARLA=0 -DWANT_VST_NOWINE=1 -DREMOTE_VST_PLUGIN_FILEPATH=../../i386-linux-gnu/lmms/RemoteVstPlugin
	cd obj-aarch64-linux-gnu && DEB_PYTHON_INSTALL_LAYOUT=deb PKG_CONFIG=/usr/bin/pkg-config cmake -DCMAKE_INSTALL_PREFIX=/usr -DCMAKE_BUILD_TYPE=None -DCMAKE_INSTALL_SYSCONFDIR=/etc -DCMAKE_INSTALL_LOCALSTATEDIR=/var -DCMAKE_EXPORT_NO_PACKAGE_REGISTRY=ON -DCMAKE_FIND_USE_PACKAGE_REGISTRY=OFF -DCMAKE_FIND_PACKAGE_NO_PACKAGE_REGISTRY=ON -DFETCHCONTENT_FULLY_DISCONNECTED=ON -DCMAKE_INSTALL_RUNSTATEDIR=/run -DCMAKE_SKIP_INSTALL_ALL_DEPENDENCY=ON "-GUnix Makefiles" -DCMAKE_VERBOSE_MAKEFILE=ON -DCMAKE_INSTALL_LIBDIR=lib/aarch64-linux-gnu -DCONTRIBUTORS=/build/reproducible-path/lmms-1.2.2\+dfsg1/doc/CONTRIBUTORS -DFORCE_VERSION=internal -DWANT_QT5=1 -DWANT_CARLA=0 -DWANT_VST_NOWINE=1 -DREMOTE_VST_PLUGIN_FILEPATH=../../i386-linux-gnu/lmms/RemoteVstPlugin ..
CMake Error at CMakeLists.txt:1 (CMAKE_MINIMUM_REQUIRED):
  Compatibility with CMake < 3.5 has been removed from CMake.

  Update the VERSION argument <min> value.  Or, use the <min>...<max> syntax
  to tell CMake that the project requires at least <min> but has been updated
  to work with policies introduced by <max> or earlier.

  Or, add -DCMAKE_POLICY_VERSION_MINIMUM=3.5 to try configuring anyway.
-------------------------------------------------------------------------------

The above is just how the build ends and not necessarily the most relevant part.
If required, the full build log is available here (for the next 30 days):
https://debusine.debian.net/artifact/2403013/

The most likely cause of build failures is the removed backwards compatibility for
CMake versions earlier than 3.5. You can find additional information in my
debian-devel announcement:

https://lists.debian.org/debian-devel/2025/04/msg00310.html

About the archive rebuild: The build was made on debusine.debian.net,
using sbuild.

You can find the build task here:
https://debusine.debian.net/work-request/153973/

If this is really a bug in one of the build-depends, please use
reassign and affects, so that this is still visible in the BTS web
page for this package.

Thanks,
Timo

#1113238#12
Date:
2025-09-01 11:52:09 UTC
From:
To:
I have downgraded the bug to non-RC severity temporarily and reverted
CMake in unstable to version 3.31.6. I plan to re-upgrade in about a
month's time. I realize that despite my April announcement, the upload
to unstable came rather surprising, and I don't want to cause
unnecessary pain.

Also, the build log URL has an unfortunate mistake. The correct URL
should include the workspace, i.e.,

https://debusine.debian.net/debian/developers/artifact/XXXX

CMake 4 will also be available in experimental again, so it can be
used to verify that the bug is fixed.

Cheers
Timo

#1113238#19
Date:
2026-02-07 00:34:21 UTC
From:
To:
This has been reported upstream at https://github.com/LMMS/lmms/issues/7822

Philip Chung