# About qt4-ruby **URL:** \ **Category:** Ruby\ **Created:** [December 17, 2008, 9:56am UTC](https://www.ruby-forum.com/t/about-qt4-ruby/155827 "2008-12-17T09:56:05Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![Magicloud](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/f17d59/32.png) [@Magicloud](https://www.ruby-forum.com/u/Magicloud)\ **Post date:** [December 17, 2008, 9:56am UTC](https://www.ruby-forum.com/t/about-qt4-ruby/155827/1 "2008-12-17T09:56:05Z")
Hi, Today I compiled qt4-ruby in my rhel5 box. And have a little test. Well, when the .rb runs, it says something wrong from qtruby4.so, libsmokeqt.so.2 does not have symbol of \_ZN8QWebView11qt\_metacastEPKc. I recompiled qt4 with -webkit option, and qt4-ruby. Not helping. ---
**Author:** ![Magicloud](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/f17d59/32.png) [@Magicloud](https://www.ruby-forum.com/u/Magicloud)\ **Post date:** [December 17, 2008, 1:23pm UTC](https://www.ruby-forum.com/t/about-qt4-ruby/155827/2 "2008-12-17T13:23:24Z")
Alle Wednesday 17 December 2008, Magicloud ha scritto: > Hi, > Today I compiled qt4-ruby in my rhel5 box. And have a little test. > Well, when the .rb runs, it says something wrong from qtruby4.so, > libsmokeqt.so.2 does not have symbol of \_ZN8QWebView11qt\_metacastEPKc. > I recompiled qt4 with -webkit option, and qt4-ruby. Not helping. It’s smoke which doesn’t have the symbol, not qt itself, so you’ll need to recompile smoke, and maybe also qtruby itself too. Stefano ---
**Author:** ![Magicloud](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/f17d59/32.png) [@Magicloud](https://www.ruby-forum.com/u/Magicloud)\ **Post date:** [December 18, 2008, 2:56am UTC](https://www.ruby-forum.com/t/about-qt4-ruby/155827/3 "2008-12-18T02:56:33Z")
Stefano C. wrote: > recompile smoke, and maybe also qtruby itself too. > > Stefano So may I know how to compile smoke? I read smoke/README, and ran the four commands in it, which gave me a new libsmokeqt.so, which still does not work. ---
**Author:** ![Magicloud](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/f17d59/32.png) [@Magicloud](https://www.ruby-forum.com/u/Magicloud)\ **Post date:** [December 18, 2008, 9:23am UTC](https://www.ruby-forum.com/t/about-qt4-ruby/155827/4 "2008-12-18T09:23:58Z")
Alle Thursday 18 December 2008, Magicloud ha scritto: > > Stefano > > So may I know how to compile smoke? I read smoke/README, and ran the > four commands in it, which gave me a new libsmokeqt.so, which still does > not work. If you mean the commands: cd qt ./qtguess.pl ./generate.pl make they’re not enough. As the README states, they’re only to generate the .cpp files. What you need is the following: - go in the top level directory of qtruby - mkdir build - cd build - cmake … - make - sudo make install This will install qtruby4 in /usr/local (excluding the ruby bindings themselves, which will be installed in /usr/lib/ruby/site\_ruby/1.8 (or something like this, depending on whether ruby itself is installed). If you want to install it somewhere else, replace the cmake … command with cmake -DCMAKE\_INSTALL\_PREFIX=/path/to/install/dir … I think this should solve your problem. If you have other questions about qtruby, you can post them in the qtruby forum, which you can find at [http://rubyforge.org/projects/korundum](http://rubyforge.org/projects/korundum), where you’ll be more likely to get an answer (and a better one, too, since there questions are answered by the developers themselves). I hope this helps Stefano ---
**Author:** ![Magicloud](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/f17d59/32.png) [@Magicloud](https://www.ruby-forum.com/u/Magicloud)\ **Post date:** [December 19, 2008, 5:06am UTC](https://www.ruby-forum.com/t/about-qt4-ruby/155827/5 "2008-12-19T05:06:33Z")
Stefano C. wrote: > > > > ``` > > > > I recompiled qt4 with -webkit option, and qt4-ruby. Not helping. > > > > > > > > ``` > > - mkdir build > cmake -DCMAKE\_INSTALL\_PREFIX=/path/to/install/dir … I used kdebindings instead of qt4-ruby, everything is fine now. Thanks.