Your message dated Mon, 14 Sep 2026 14:23:48 +0000
with message-id <[email protected]>
and subject line Bug#1147678: fixed in mupen64plus-core 2.6.0-4
has caused the Debian Bug report #1147678,
regarding mupen64plus-core: FTBFS with OpenCV 5.0
to be marked as done.
This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.
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--
1147678: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1147678
Debian Bug Tracking System
Contact [email protected] with problems
--- Begin Message ---
Source: mupen64plus-core
Version: 2.6.0-3
Severity: important
Tags: ftbfs
User: [email protected]
Usertags: opencv5-transition
Control: affects -1 src:opencv
X-Debbugs-Cc: [email protected], [email protected]
Dear maintainer,
Your package fails to build from source against opencv 5.0.0+dfsg-1~exp1,
currently in experimental.
OpenCV 5.0 renames its entire install tree from opencv4 to opencv5 and ships
no compatibility shims:
* pkg-config: only /usr/lib/<triplet>/pkgconfig/opencv5.pc. There is no
opencv4.pc and no opencv.pc.
* headers: /usr/include/opencv5/opencv2/..., no /usr/include/opencv4.
* cmake: /usr/lib/<triplet>/cmake/opencv5/OpenCVConfig.cmake. A bare
find_package(OpenCV) still resolves, but a pinned version
such as find_package(OpenCV 4.7) no longer matches.
* modules: libopencv-calib3d-dev is split into libopencv-calib-dev,
libopencv-geometry-dev, libopencv-stereo-dev and
libopencv-ptcloud-dev; libopencv-features2d-dev becomes
libopencv-features-dev. The CMake component names change
with them (features2d -> features).
* geometry: the new geometry module is not only a piece of calib3d. It
also absorbs shape and contour functions that used to live
in imgproc -- contourArea, arcLength, approxPolyDP,
boundingRect, minAreaRect, convexHull and
getPerspectiveTransform among them -- and opencv2/opencv.hpp
does not pull in opencv2/geometry.hpp, so code that reached
those through the umbrella header now needs an explicit
include of opencv2/geometry.hpp.
mupen64plus-core fails because projects/unix/Makefile line 343 aborts
with "No OpenCV development libraries found!" as soon as OPENCV=1 is
set and pkg-config cannot resolve the opencv4 module; debian/patches/
Build-against-libopencv4.patch is what wires the OpenCV feature to
"pkg-config opencv4", and OpenCV 5.0 ships opencv5.pc instead. The
probe is not confined to the build step: it also fires when running
"make distclean", so the debian/rules clean invocation that
dpkg-buildpackage runs before dh_auto_build already aborts here, and
the build never even reaches the compile stage in this log. The
maintainer should update Build-against-libopencv4.patch to probe
"pkg-config --exists opencv5" (falling back to opencv4 for older
releases) and use the CFLAGS/LIBS it reports, rather than hardcoding
the opencv4 module name.
The same source builds fine in the same chroot against the OpenCV 4.10
packages currently in unstable, so this is specific to OpenCV 5.
The relevant part of the build log follows; the full log is attached.
dpkg-source: info: skipping absent keyring
/usr/share/keyrings/debian-maintainers.pgp
dpkg-source: info: extracting mupen64plus-core in
/build/reproducible-path/mupen64plus-core-2.6.0
dpkg-source: info: unpacking mupen64plus-core_2.6.0.orig.tar.gz
dpkg-source: info: unpacking mupen64plus-core_2.6.0-3.debian.tar.xz
dpkg-source: info: using patch list from debian/patches/series
dpkg-source: info: applying Use-font-from-fonts-dejavu-core.patch
dpkg-source: info: applying
Disable-the-disassembler-of-the-recompiled-code.patch
dpkg-source: info: applying Fix-spelling-errors.patch
dpkg-source: info: applying Build-against-libopencv4.patch
dpkg-source: info: applying
Don-t-print-recomp-interpreter-debug-info-when-debugger-i.patch
dpkg-source: info: applying Fix-minizip-includes-for-zlib-v1.3.2-1173.patch
Check disk space
----------------
Sufficient free space for build
User Environment
----------------
APT_CONFIG=/var/lib/sbuild/apt.conf
HOME=/sbuild-nonexistent
LANG=en_US.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 -j40
dpkg-buildpackage: info: source package mupen64plus-core
dpkg-buildpackage: info: source version 2.6.0-3
dpkg-buildpackage: info: source distribution unstable
dpkg-buildpackage: info: source changed by Sven Eckelmann <[email protected]>
dpkg-source --before-build .
dpkg-buildpackage: info: host architecture amd64
debian/rules clean
dh clean --sourcedirectory="projects/unix"
debian/rules override_dh_auto_clean
make[1]: Entering directory '/build/reproducible-path/mupen64plus-core-2.6.0'
make[2]: Entering directory
'/build/reproducible-path/mupen64plus-core-2.6.0/projects/unix'
Makefile:343: *** No OpenCV development libraries found!. Stop.
make[2]: Leaving directory
'/build/reproducible-path/mupen64plus-core-2.6.0/projects/unix'
make[1]: *** [debian/rules:31: override_dh_auto_clean] Error 25
make[1]: Leaving directory '/build/reproducible-path/mupen64plus-core-2.6.0'
make: *** [debian/rules:25: clean] Error 2
dpkg-buildpackage: error: debian/rules clean subprocess failed with
exit status 2
--------------------------------------------------------------------------------
Please close this bug if it turns out to be a collision with another ongoing
transition rather than an OpenCV 5 problem.
Thanks,
Aron
mupen64plus-core_2.6.0-3_amd64-2026-09-11T192139Z.build.gz
Description: GNU Zip compressed data
--- End Message ---
--- Begin Message ---
Source: mupen64plus-core
Source-Version: 2.6.0-4
Done: Sven Eckelmann <[email protected]>
We believe that the bug you reported is fixed in the latest version of
mupen64plus-core, which is due to be installed in the Debian FTP archive.
A summary of the changes between this version and the previous one is
attached.
Thank you for reporting the bug, which will now be closed. If you
have further comments please address them to [email protected],
and the maintainer will reopen the bug report if appropriate.
Debian distribution maintenance software
pp.
Sven Eckelmann <[email protected]> (supplier of updated mupen64plus-core
package)
(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing [email protected])
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA512
Format: 1.8
Date: Mon, 14 Sep 2026 15:28:58 +0200
Source: mupen64plus-core
Architecture: source
Version: 2.6.0-4
Distribution: unstable
Urgency: medium
Maintainer: Debian Games Team <[email protected]>
Changed-By: Sven Eckelmann <[email protected]>
Closes: 1147678
Changes:
mupen64plus-core (2.6.0-4) unstable; urgency=medium
.
* debian/patches:
- Modify Build-against-libopencv4.patch, fix build against libopencv5
(Closes: #1147678)
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