Fixing : The Eclipse executable launcher was unable to locate its companion shared library

After upgrading from Ubuntu 12.10 to 13.04, I had this problem.

As it is usual case with eclipse "eclipse.ini" was the point of issue. 

This file can be found in /etc/eclipse.ini . 

Here are the contents my eclipse.ini file:

####################################################################

-startup

plugins/org.eclipse.equinox.launcher_1.2.0.dist.jar

--launcher.library

plugins/org.eclipse.equinox.launcher.gtk.linux.x86_1.1.100.dist

-showsplash

org.eclipse.platform

--launcher.XXMaxPermSize

256m

--launcher.defaultAction

openFile

-vmargs

-Xms1024m

-Xmx1600m

-XX:MaxPermSize=1024m

-Dorg.eclipse.equinox.p2.reconciler.dropins.directory=/usr/share/eclipse/dropins 

####################################################################

So first test was to check existance of org.eclipse.equinox.launcher_1.2.0.dist.jar

and org.eclipse.equinox.launcher.gtk.linux.x86_1.1.100.dist on system. 

Upgrade replaced these files with newer versions. 

  

So fixing this issue was as simple as changing names of these files to match newer version. 

New contents my eclipse.ini file

####################################################################  

-startup

plugins/org.eclipse.equinox.launcher_1.3.0.dist.jar

--launcher.library

plugins/org.eclipse.equinox.launcher.gtk.linux.x86_1.1.200.dist

-showsplash

org.eclipse.platform

--launcher.XXMaxPermSize

256m

--launcher.defaultAction

openFile

-vmargs

-Xms1024m

-Xmx1600m

-XX:MaxPermSize=1024m

-Dorg.eclipse.equinox.p2.reconciler.dropins.directory=/usr/share/eclipse/dropins 

######################################################################