Hi Adam! On Tue, Jul 05, 2022 at 10:43:19PM +0000, Adam Katz wrote: > Package: libqt5gui5 > Version: 5.15.4+dfsg-3 > > This builds on bug 919218, "non-transition: libqt5gui5-gles", > https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=919218 > > There are still ~23 packages that are broken (forcibly uninstalled) > in response to installing libqt5gui5-gles, 7 by omitting the OpenGL > alternative and 16 by a dependency-listing bug.
For most of these packages, this means that they use symbols that exist only in libqt5gui5 and not in libqt5gui5-gles, for example QOpenGLFunctions without _ES2 suffix. What you call "dependency-listing bug" is actually the way how symbols dependencies work: if a package uses some symbols that exist in both versions, and some symbols that exist only in one version, it will get an A | B dependency for the first group of symbols and just A for the second group. The way to make them compatible with both versions will be resolving the OpenGL version and required functions at runtime, but it will usually mean a major rewrite. > As an alternative to fixing all of these packages, you could rename > the current libqt5gui5 package as something like `libqt5gui5-nogles` > and then create a new `libqt5gui5` package that simply depends on > `libqt5gui5-nogles | libqt5gui5-gles`. It will be wrong. If a package depends on just libqt5gui5, it won't run with libqt5gui5-gles, even if you make the dependency satisfiable. > The rest of this post is about identifying those 7+16 broken packages. > [...] I took a few packages from your lists and looked at them: - elektra-qt-gui: FTBFS for many years so did not get the new dependency - mldemos: FTBFS for several years so did not get the new dependency - audacious-plugins: Uses QOpenGLFunctions_2_0 - cloudcompare: Uses QOpenGLFunctions_2_1 - colmap: Uses QOpenGLFunctions_3_2_Core I believe most of the other packages will fall into one of these two categories. Also, if a package build-depends on libqt5opengl5-desktop-dev, it is a good sign that it will work only with desktop OpenGL and not with OpenGL ES. > PS: What's the preferred wrapping scheme in Debian bugs? > I don't see a style guide beyond https://www.debian.org/Bugs/Reporting > and that's likely because I'm not using reportbug. I usually wrap at 78 characters, as recommended by RFC 2822. -- Dmitry Shachnev
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