Arch Linux

Looks like a problem with ruby-cairo, not rubyripper.

$ irb
irb(main):001:0> require "gtk2"
LoadError: /usr/lib/ruby/vendor_ruby/2.0.0/x86_64-linux/pango.so: undefined symbol: rb_cCairo_Context - /usr/lib/ruby/vendor_ruby/2.0.0/x86_64-linux/pango.so
from /usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:45:in `require'
from /usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:45:in `require'
from /usr/lib/ruby/vendor_ruby/2.0.0/pango.rb:28:in `rescue in <top (required)>'
from /usr/lib/ruby/vendor_ruby/2.0.0/pango.rb:24:in `<top (required)>'
from /usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:45:in `require'
from /usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:45:in `require'
from /usr/lib/ruby/vendor_ruby/2.0.0/gtk2/base.rb:14:in `<top (required)>'
from /usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:45:in `require'
from /usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:45:in `require'
from /usr/lib/ruby/vendor_ruby/2.0.0/gtk2.rb:11:in `<top (required)>'
from /usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:45:in `require'
from /usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:45:in `require'
from (irb):1
from /usr/bin/irb:12:in `<main>'
irb(main):002:0> require "cairo"
LoadError: cannot load such file -- cairo.so
from /usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:45:in `require'
from /usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:45:in `require'
from /usr/lib/ruby/vendor_ruby/2.0.0/cairo.rb:46:in `rescue in <top (required)>'
from /usr/lib/ruby/vendor_ruby/2.0.0/cairo.rb:42:in `<top (required)>'
from /usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:45:in `require'
from /usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:45:in `require'
from (irb):2
from /usr/bin/irb:12:in `<main>'

The cairo gem directly installed via "gem" works (and rrip_gui works as well), so this seems like a packaging bug with ruby-cairo. Reassigning.

Hi, thanks for reporting. I'm on it.

Even after installing both cairo and pango with these commands:
sudo gem install --development cairo
sudo gem install --development pango

It still does not work for me:
% irb
irb(main):001:0> require "gtk2"
LoadError: /usr/lib/ruby/vendor_ruby/2.0.0/x86_64-linux/pango.so: undefined symbol: rb_cCairo_Context - /usr/lib/ruby/vendor_ruby/2.0.0/x86_64-linux/pango.so
from /usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:45:in `require'
from /usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:45:in `require'
from /usr/lib/ruby/vendor_ruby/2.0.0/pango.rb:28:in `rescue in <top (required)>'
from /usr/lib/ruby/vendor_ruby/2.0.0/pango.rb:24:in `<top (required)>'
from /usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:45:in `require'
from /usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:45:in `require'
from /usr/lib/ruby/vendor_ruby/2.0.0/gtk2/base.rb:14:in `<top (required)>'
from /usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:45:in `require'
from /usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:45:in `require'
from /usr/lib/ruby/vendor_ruby/2.0.0/gtk2.rb:11:in `<top (required)>'
from /usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:45:in `require'
from /usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:45:in `require'
from (irb):1
from /usr/bin/irb:12:in `<main>'
irb(main):002:0>

How did you install the gems?

Using sudo is wrong (it'll install the gem to /root/.gem), and I've no idea what the --development flag does. Just "gem install cairo".

Note that this has been an issue before without it being a packaging bug: https://github.com/v01d/pacman-notifier/issues/4

I'm not sure what to say to that. The gem works, your package does not. pango is not at all involved here except that it happens to be what has the require 'cairo' line.

The root of the problem here was nicely illustrated in the IRB backtrace I posted:

LoadError: cannot load such file -- cairo.so

cairo.so does not exist in community/ruby-cairo. Installing the gem causes the shared lib to be built and installed properly.

I'm no Makefile guru, but could these two lines be the problem?

Makefile:238: warning: overriding recipe for target `install-so'
Makefile:182: warning: ignoring old recipe for target `install-so'

(These appear twice during a makepkg for ruby-cairo...)

Adding

install ext/cairo/cairo.so ${pkgdir}/usr/lib/ruby/vendor_ruby/2.0.0/x86_64-linux/

to the package() routine of the PKGBUILD fixes the problem, but is obviously an ugly hack.

Oops, that should be

install ext/cairo/cairo.so ${pkgdir}/usr/lib/ruby/vendor_ruby/2.0.0/${arch}-linux/

@falconindy The gem working is not a guarantee for that it's a packaging problem instead of a problem with the released tarball. I think this is an upstream issue.

Jeremy, thank you, I'll implement the suggestion.

I've had a proper cold for a few days, so sorry for the slight delay on this fix.

Jeremy, added your name as a contributor to the PKGBUILD.

The updated package will appear in [community] shortly.

The initial reason for this bug report is not yet solved:

[boenki ~]$ pacman -Qs ruby-cairo
local/ruby-cairo 1.12.2-6
Ruby bindings for cairo
[boenki ~]$ rrip_gui
ruby-gettext is not found. Translations are disabled!
The ruby-gtk2 library could not be found. Is it installed?

Original title was
[rubyripper] gui does not start.

and that still does not work

I just see this task is reopened:
But it was fixed after this bugreport
 FS#34500  - [ruby-cairo] cairo.so in wrong $arch

Unable to reproduce:

% irb
irb(main):001:0> require "gtk2"
=> true
irb(main):002:0>

Applications like "rubyroom" from AUR work too.

If this is still a problem, I believe it's a problem with rubyripper.

This still isn't a rubyripper problem.

Hi, as I already said, this IS FIXED!

>I just see this task is reopened:
>But it was fixed after this bugreport
>  FS#34500  - [ruby-cairo] cairo.so in wrong $arch

I asked to reopen, because rubyripper did not start at that time. When I found the reason, I could not change my comment here, but opend  FS#34500  instead.

I'm sorry for the trouble. :)

Dave, this wasn't a problem with ruby-gtk2 or ruby-cairo at the time you assigned the bug to me. Assigning back to you. Close the bug instead.