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112 lines
3.6 KiB
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112 lines
3.6 KiB
Markdown
---
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layout: post
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title: "Digikam, dependencies, and building KDE libraries"
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date: 2015-09-05 12:49:51 +0200
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comments: true
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categories:
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---
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Context
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=======
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I have a very basic KDE environment, just enough to be able to run
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Digikam. Anytime I try to delete a photo, I get an error message:
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```plain
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Could not start process
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Unable to create io-slave: klauncher said: Unknown protocol 'trash'.
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```
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Oh, well. So I guess the FreeBSD port for Digikam fails to list a
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required dependency.
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Building KDE workspace
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======================
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A little grep'ping in port plists hints that the missing dep
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might be x11/kde4-workspace. Alright, let's build that.
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```plain Build log
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[...]
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===> Registering installation for kfilemetadata-4.14.3_2 as automatic
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pkg-static: Unable to access file /var/ports/work/usr/ports/sysutils/kfilemetadata/work/stage/usr/local/lib/libkfilemetadata.so.4.14.3: No such file or directory
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*** Error code 74
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```
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The kfilemetadata fails to install. That file is indeed missing; the staging area
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does however contain a libkfilemetadata.so.4.14.2. So why does the source package
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of 4.14.3 generate a 4.14.2 library?
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A trip in KDE-build-land
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========================
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Answer: the library version is not set by the package itself, it comes from a
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default value from:
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o
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```plain /usr/local/share/apps/cmake/modules/KDE4Defaults.cmake
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set(GENERIC_LIB_VERSION "4.14.2")
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```
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Where does this come from?
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```plain
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$ pkg which /usr/local/share/apps/cmake/modules/KDE4Defaults.cmake
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/usr/local/share/apps/cmake/modules/KDE4Defaults.cmake was installed by package kdelibs-4.14.2_5
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```
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Conclusion: the build dependency for kfilemetadata should list the exact same version of
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kdelibs, or the port won't build.
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So, we now need to upgrade kdelibs in order to be able to build kfilemetadata, which
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is a dependency of kde4-workspace, which is an unlisted dependency of Digikam.
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Rebuilding kdelibs from sources involves a portmaster operation that will on this
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system rebuild a few hundred depedencies, so doesn't sound like an attractive option
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(too big a build to babysit, with likely hiccups on the way, and in any case too
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much of an earthquake with so many ports being updated at once.
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Upgrading kdelibs
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=================
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Let's instead upgrade kdelibs from binary package, and hope for the best:
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```plain
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# pkg install -f kdelibs
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```
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This breaks because the binary package depends on a newer libpng, so let's upgrade this one,
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keeping the old shared lib intact just in case.
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```plain
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$ digikam
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/usr/local/lib/libpng16.so.16: version PNG16_0 required by /usr/local/lib/libkhtml.so.5 not defined
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```
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Strange that libpng 1.6.16 does not have version 16... Sigh... OK, upgrading from png-1.6.16
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to png-1.6.18 appears to fix the problem. Back on track...
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Back to KDE Workspace
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=====================
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Side note: hey, couldn't I just install kde-workspace from packages as well? Well,
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for some reason pkg wants to remove my TeXlive install, and upgrade two dozen other
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packages, so thanks, but no thanks. (I would have gone for it were it not for the
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removal of TeXlive. But that's too much breakage to fix downstream.)
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Now Digikam displays its splash screen and starts initializing, then segfaults.
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Hell, I'll have to bite the bullet and upgrade a few hundred packages from ports. :-(
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portupgrade: Be Afraid, Be Very Afraid
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======================================
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```plain
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# portmaster -dvw digikam
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```
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(It's beyond my understanding why `-w`, i.e. "Keep old shared libs in the hope of not rendering
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other applications unusable" is not the default)
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As a corollary, I'll have to upgrade to GnuPG 2.1 (dependncy of `security/gpgme`) -- I had so
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far carefully stuck with `security/gnupg20`.
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