Bug#318765: libqt4-dev: got broken alternatives symlink for moc

[Brian Nelson <pyro@debian.org>]

Jan Niehusmann <jan@gondor.com> writes:

> Compiling a simple test program with qt4 failed with this error message:
>
> $ qmake
> $ make
> (cd "/src/tools/moc" && make)
> /bin/sh: line 0: cd: /src/tools/moc: No such file or directory
> make: *** [/usr/bin/moc] Error 1
>
> The reason is, that I somehow ended up with a broken alternatives
> symlink
> for moc:
>
> $ ls -al /etc/alternatives/moc 
> lrwxrwxrwx 1 root root 20 Nov 5 2003 /etc/alternatives/moc ->
> /usr/lib/qt2/bin/moc
> $ ls -al /usr/lib/qt2/bin/moc
> ls: /usr/lib/qt2/bin/moc: No such file or directory

Hmm, I wonder if an old Qt2 package didn't properly call
"update-alternatives --remove" in the prerm.


> Unfortunately, update-alternatives seems to be unable to correct this:
>
> # update-alternatives --config moc
>
> There is only 1 program which provides moc
> (/usr/bin/moc-qt4). Nothing to configure.

That's probably an update-alternatives bug, but there are so many to
choose from I can't figure out which one it is...  #100135 is one
possibility...


> Of course, the fix is trivial (manually correct the symlink). I have no
> idea how this happened, but I surely didn't manually mess with the
> alternatives. Probably some interesting sequence of installs and
> uninstalls of different versions of qt.

Yep, that would be my guess.

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