[Slackbuilds-users] Error building inkscape-0.91

[Duncan Roe]

Hi all,

This looks to me to be a problem for upstream. I'm posting here because of the
workaround and also because I guess any bug report to upstream should come from
the maintainer.

At least on 32-bit, the SlackBuild terminates with this error:
>   CXXLD    inkscape
> /usr/lib/libdbus-glib-1.so.2: undefined reference to `dbus_message_iter_abandon_container'
> collect2: error: ld returned 1 exit status
> make[3]: *** [inkscape] Error 1

In brief, the workaround is to complete the SlackBuild by hand, inserting
"-ldbus-1" near the end of g++ lines that invoke ld (one for inkscape, one for
inkview).

THE WORKAROUND

To get the g++ command line, as root cd to /tmp/SBo/inkscape-0.91 and run
> make V=1
redirecting output to a file. Edit this file into a shell script e.g.
> #!/bin/sh
> cd /tmp/SBo/inkscape-0.91/src
> g++ -Wpointer-arith -Wcast-align -Wsign-compare -Woverloaded-virtual ...

The g++ line above is over 16KB but vi copes. At the end, change
 > /usr/lib/libglib-2.0.so -pthread -fopenmp
 to
 > /usr/lib/libglib-2.0.so -ldbus-1 -pthread -fopenmp

Now run make. It will fail similarly when loading inkview. Repeat steps above.

Run make again. It will complete.

Paste in to your root build xterm enough of the SlackBuild to set all the
upper-case shell variables (i.e. from "TMP=" through "fi"). Set CWD to be the
original directory containing inkscape.SlackBuild. Your curent working directory
should still be /tmp/SBo/inkscape-0.91.

To be safe, re-issue the mkdir -p at line 60 (I changed it to -pv and it claimed
to make something).

Paste in and execute everything from the make install on line 84 onwards.

SOME KIND OF AN EXPLANATION

The g++ line doesn't mention libdbus-glib-1. It seems some other .so is pulling
it in as a dependency.

As it happens, I have a tool, findit(*), which can investigate this sort of
problem. It agreed with ld:
> 23:45:32# findit /usr/lib/libdbus-glib-1.so.2 dbus_message_iter_abandon_container
> /usr/lib/libdbus-glib-1.so.2: undefined symbol: dbus_message_iter_abandon_container. (dlsym)

/usr/lib/libdbus-glib-1.la advertises a number of dependencies:
> # Libraries that this one depends upon.
> dependency_libs=' /usr/lib/libdbus-1.la -lrt /usr/lib/libgio-2.0.la ...

libdbus-1.la only shows -lpthread -lrt as dependencies. Ignoring that:
> 23:58:31# findit -ldbus-1 /usr/lib/libdbus-glib-1.so.2 dbus_message_iter_abandon_container
> Found dbus_message_iter_abandon_container in /usr/lib/libdbus-glib-1.so.2 at 0xb75a9fb0

It's been my experience in the past that shared libraries will sometimes provide
a symbol without loading dependencies and sometimes they won't. Or the same
shared library may provide some symbols and not others. Hence the workaround.

WHERE IS THE BUG REALLY?

I would say the fault lies with whatever library is pulling in libdbus-glib-1.
It should also pull in libdbus-1. Maybe someone will "just know" which library
"it" is.

Cheers ... Duncan.

(*) findit is part of https://github.com/duncan-roe/command_line_tools
    If you would like it, feel free to take a clone