Your message dated Fri, 18 Sep 2026 09:50:46 +0000
with message-id <[email protected]>
and subject line Bug#1147694: fixed in xsnow 1:3.9.6-1
has caused the Debian Bug report #1147694,
regarding xsnow: 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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--
1147694: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1147694
Debian Bug Tracking System
Contact [email protected] with problems
--- Begin Message ---
Source: xsnow
Version: 1:3.9.4-1
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.
xsnow fails because its configure script's PKG_CHECK_MODULES probe queries
pkg-config for the module name "opencv4" (log lines 3925-3926 / excerpt
lines 46-47: "checking for opencv4... no" / "configure: error: Package
requirements (opencv4) were not met:"). This is a hardcoded module name in
configure.ac (via PKG_CHECK_MODULES(CV, opencv4 ...)), not a compile-time
API break, so xsnow needs no source changes. The maintainer should update
configure.ac to probe for "opencv5" instead of "opencv4" (or accept either
name), then run autoreconf to regenerate configure.
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.
checking whether x86_64-linux-gnu-g++ accepts -g... yes
checking dependency style of x86_64-linux-gnu-g++... none
checking for ranlib... ranlib
checking for x86_64-pc-linux-gnu-gcc... no
checking for gcc... gcc
checking whether the compiler supports GNU C... yes
checking whether gcc accepts -g... yes
checking for gcc option to enable C23 features... (cached) none needed
checking whether gcc understands -c and -o together... yes
checking dependency style of gcc... none
checking whether the C compiler works... yes
checking for C compiler default output file name... a.out
checking for suffix of executables...
checking whether we are cross compiling... no
checking for suffix of object files... o
checking how to run the C preprocessor... gcc -E
checking for X... libraries , headers
checking for stdio.h... yes
checking for stdlib.h... yes
checking for string.h... yes
checking for inttypes.h... yes
checking for stdint.h... yes
checking for strings.h... yes
checking for sys/stat.h... yes
checking for sys/types.h... yes
checking for unistd.h... yes
checking for assert.h... yes
checking for ctype.h... yes
checking for math.h... yes
checking for pthread.h... yes
checking for signal.h... yes
checking for stdarg.h... yes
checking for stdio.h... (cached) yes
checking for stdlib.h... (cached) yes
checking for string.h... (cached) yes
checking for unistd.h... (cached) yes
checking for execinfo.h... yes
checking for iostream... yes
checking for unordered_map... yes
checking for unordered_set... yes
checking for pkg-config... /usr/bin/pkg-config
checking pkg-config is at least version 0.9.0... yes
checking for gtk+-3.0 gmodule-2.0... yes
checking for x11 xpm xt xext xproto xinerama xtst... yes
checking for gsl... yes
checking for opencv4... no
configure: error: Package requirements (opencv4) were not met:
Package 'opencv4' not found
Consider adjusting the PKG_CONFIG_PATH environment variable if you
installed software in a non-standard prefix.
Alternatively, you may set the environment variables CV_CFLAGS
and CV_LIBS to avoid the need to call pkg-config.
See the pkg-config man page for more details.
Please close this bug if it turns out to be a collision with another ongoing
transition rather than an OpenCV 5 problem.
Thanks,
Aron
xsnow_3.9.4-1_amd64-2026-09-11T202332Z.build.gz
Description: GNU Zip compressed data
--- End Message ---
--- Begin Message ---
Source: xsnow
Source-Version: 1:3.9.6-1
Done: Willem Vermin <[email protected]>
We believe that the bug you reported is fixed in the latest version of
xsnow, 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.
Willem Vermin <[email protected]> (supplier of updated xsnow 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: Wed, 16 Sep 2026 08:31:21 +0000
Source: xsnow
Built-For-Profiles: noudeb
Architecture: source
Version: 1:3.9.6-1
Distribution: unstable
Urgency: low
Maintainer: Willem Vermin <[email protected]>
Changed-By: Willem Vermin <[email protected]>
Closes: 1147694
Changes:
xsnow (1:3.9.6-1) unstable; urgency=low
.
* New upstream release
* Closes: 1147694
* control: Removed dependency on libopencv-dev
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