fltk backend does not load

[Shouri Chatterjee]

Stable release update justification:

Impact: Missing symbols mean that Octave's fltk plotting backend is broken.
Development branch: Fixed by removing unnecessary build-dependencies on libgl1-mesa-swx11-dev and libglu1-mesa-dev, which between them (probably mainly the first one) cause configure to fail to detect a working OpenGL installation.
Patch: http://bazaar.launchpad.net/~ubuntu-branches/ubuntu/natty/octave3.2/natty/revision/12 backports easily (changes to debian/in/control and debian/control).
TEST CASE: Run octave3.2, then type (without the outer single quotes) 'backend("fltk")' followed by 'sombrero'. You should see a coloured plot resembling a sombrero hat.
Regression potential: I imagine it's worth trying some of Octave's other example programs.

Original report follows:

Binary package hint: octave3.2

Steps to reproduce:
run octave3.2

backend("fltk")

Expected outcome:
prompt should return and the fltk backend should be usable for plotting.

Outcome:
error: /usr/lib/octave/3.2.3/oct/x86_64-pc-linux-gnu/fltk_backend.oct: undefined symbol: _ZTV15opengl_renderer
error: called from:
error: /usr/share/octave/3.2.3/m/plot/backend.m at line 56, column 5

Solution:
While compiling octave3.2, ftgl-dev is one of the dependencies. If ftgl-dev is installed while compiling, this error will not happen.

Thanks.

[Qianqian Fang (fangq)]

can anyone recompile and update octave 3.2.3 for Lucid? this is a regression, backend('fltk') worked fine on octave 3.2.2 fine on Karmic.

[Bryan (poli0048)]

I am having this problem as well. I would greatly appreciate it if the maintainer would re-compile and update the Lucid Package.

[indium (indium)]

same for me.

[inductiveload (inductiveload)]

I had the same problem, but I fixed it by building octave3.2 from source. However, I think you need libfltk1.1-dev not ftgl-dev (I didn't even have ftgl-dev and it worked).

[mzenzes (mzenzes)]

This bug seems to be still open... but is it fixed in maverick?

[Steve Wilcox (steve-j-wilcox)]

No it is not fixed, at least on my amd64 install it still fails with the same error as Shouri Chatterjee

[Rob Frohne (frohro)]

Same problem in Maverick!

Rob

[Pascal Dupuis (cdemills)]

Close to six month for the first report, and still nothing new. Yeah.

[Colin Watson (cjwatson)]

I can't reproduce this on Natty i386 (octave3.2 3.2.4-8). It's not clear to me whether this has been fixed between Maverick and Natty, or whether it's architecture-specific.

It's certainly not as simple as "recompile with libftgl-dev installed" (or libfltk1.1-dev), since both of those packages *were* installed when the build daemons built this package. Something more subtle is going on.

[Colin Watson (cjwatson)]

We've narrowed the fix down to this change in Debian 3.2.4-7:

  * Drop libgl1-mesa-swx11-dev and libglu1-mesa-dev from build-dependencies.
    They are already pulled in by other packages, so we don't need to force
    specific versions of Mesa (closes: #591333).

Before this change, configure thought that OpenGL was broken; now it detects it correctly.

I'll upload fixes for lucid and maverick, both of which I've confirmed to be broken on both amd64 and i386. karmic is fine, as is natty.

[Martin Pitt (pitti)]

Accepted octave3.2 into lucid-proposed, the package will build now and be available in a few hours. Please test and give feedback here. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you in advance!

[Martin Pitt (pitti)]

Accepted octave3.2 into maverick-proposed, the package will build now and be available in a few hours. Please test and give feedback here. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you in advance!

[Fabri Velas (fabrivelas)]

Maverick-proposed packages don't give above errors anymore. They work for me, thanks.

[Launchpad Janitor (janitor)]

This bug was fixed in the package octave3.2 - 3.2.4-6ubuntu1

---------------
octave3.2 (3.2.4-6ubuntu1) maverick-proposed; urgency=low

  * Backport from unstable (Thomas Weber):
    - Drop libgl1-mesa-swx11-dev and libglu1-mesa-dev from
      build-dependencies. They are already pulled in by other packages, so
      we don't need to force specific versions of Mesa (LP: #546671).
 -- Colin Watson <email address hidden> Wed, 09 Feb 2011 03:06:59 +0000

[Pedro Villavicencio (pedro)]

I've verified the proposed package for Lucid and it also works fine, marking this as verification-done, thanks all.

[Launchpad Janitor (janitor)]

This bug was fixed in the package octave3.2 - 3.2.3-1ubuntu1

---------------
octave3.2 (3.2.3-1ubuntu1) lucid-proposed; urgency=low

  * Backport from unstable (Thomas Weber):
    - Drop libgl1-mesa-swx11-dev and libglu1-mesa-dev from
      build-dependencies. They are already pulled in by other packages, so
      we don't need to force specific versions of Mesa (LP: #546671).
 -- Colin Watson <email address hidden> Wed, 09 Feb 2011 03:00:42 +0000