Public bug reported:

Fixed in trusty:
https://bugs.launchpad.net/ubuntu/+source/ogre-1.8/+bug/1244592

[Impact]
The Ogre3D 1.8.1 plugins are in the wrong directory. They should either be in 
OGRE-1.8 or OGRE-1.8.1 but not in OGRE-1.8.0, this causes problems when 
compiling freeOrion and OpenMW. The workaround at this moment is to "sudo ln 
-sf OGRE-1.8.0 OGRE-1.8.1" and rebuild or add kludge code their respective 
CMake files.

find /usr/lib/x86_64-linux-gnu | grep -i OGRE

/usr/lib/x86_64-linux-gnu/libOgreProperty.so
/usr/lib/x86_64-linux-gnu/libOgrePaging.so.1.8.1
/usr/lib/x86_64-linux-gnu/libOgreTerrain.so
/usr/lib/x86_64-linux-gnu/libOgreTerrain.so.1.8.1
/usr/lib/x86_64-linux-gnu/pkgconfig/OGRE-Paging.pc
/usr/lib/x86_64-linux-gnu/pkgconfig/OGRE-Terrain.pc
/usr/lib/x86_64-linux-gnu/pkgconfig/OGRE-RTShaderSystem.pc
/usr/lib/x86_64-linux-gnu/pkgconfig/OGRE-PCZ.pc
/usr/lib/x86_64-linux-gnu/pkgconfig/OGRE.pc
/usr/lib/x86_64-linux-gnu/pkgconfig/OGRE-Property.pc
/usr/lib/x86_64-linux-gnu/libOgreRTShaderSystem.so
/usr/lib/x86_64-linux-gnu/libOgreRTShaderSystem.so.1.8.1
/usr/lib/x86_64-linux-gnu/libOgreMain.so
/usr/lib/x86_64-linux-gnu/libOgrePaging.so
/usr/lib/x86_64-linux-gnu/OGRE-1.8.0
/usr/lib/x86_64-linux-gnu/OGRE-1.8.0/Plugin_BSPSceneManager.so.1.8.1
/usr/lib/x86_64-linux-gnu/OGRE-1.8.0/Plugin_ParticleFX.so.1.8.1
/usr/lib/x86_64-linux-gnu/OGRE-1.8.0/RenderSystem_GL.so
/usr/lib/x86_64-linux-gnu/OGRE-1.8.0/Plugin_PCZSceneManager.so.1.8.1
/usr/lib/x86_64-linux-gnu/OGRE-1.8.0/Plugin_ParticleFX.so
/usr/lib/x86_64-linux-gnu/OGRE-1.8.0/Plugin_OctreeZone.so
/usr/lib/x86_64-linux-gnu/OGRE-1.8.0/Plugin_PCZSceneManager.so
/usr/lib/x86_64-linux-gnu/OGRE-1.8.0/Plugin_BSPSceneManager.so
/usr/lib/x86_64-linux-gnu/OGRE-1.8.0/Plugin_OctreeSceneManager.so
/usr/lib/x86_64-linux-gnu/OGRE-1.8.0/Plugin_OctreeSceneManager.so.1.8.1
/usr/lib/x86_64-linux-gnu/OGRE-1.8.0/RenderSystem_GL.so.1.8.1
/usr/lib/x86_64-linux-gnu/OGRE-1.8.0/Plugin_OctreeZone.so.1.8.1
/usr/lib/x86_64-linux-gnu/libOgreMain.so.1.8.1
/usr/lib/x86_64-linux-gnu/libOgreProperty.so.1.8.1

ogre's pc files are correct, the problem is with packages that use cmake
and find_package(OGRE). cmake comes with their own scripts and are
looking in OGRE-{VERSION}, while .pc files tell autotools to look in
OGRE-1.8.0.

[Test Case]
Try compiling openmw or freeorion, or any cmake build tools application. They 
will fail for not finding plugins in OGRE-1.8.1

[Proposed fix]
The least invasive fix is to symlink OGRE-1.8.0 and OGRE-1.8.1. The other 
option is for depending libraries to not use cmake's find_package but instead 
use pkgconfig. I'll try another build with a simple symlink

[Regression potential]
Zero, nothing is changed/removed from the package - we're just adding a symlink 
to maintain backwards compatibility.

** Affects: ogre-1.8 (Ubuntu)
     Importance: Undecided
         Status: Triaged

** Changed in: ogre-1.8 (Ubuntu)
       Status: New => Triaged

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https://bugs.launchpad.net/bugs/1250924

Title:
  [SRU] Ubuntu changes to Ogre install plugins in wrong directory

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