so file generated error

cctpKA4O.jar:(.text+0x32): undefined reference to `org::eclipse::swt::widgets::Display::class$'
cctpKA4O.jar:(.text+0x41): undefined reference to `org::eclipse::swt::widgets::Display::Display()'
cctpKA4O.jar:(.text+0x4a): undefined reference to `org::eclipse::swt::widgets::Shell::class$'
cctpKA4O.jar:(.text+0x63): undefined reference to `org::eclipse::swt::widgets::Shell::Shell(org::eclipse::swt::widgets::Display*)'
cctpKA4O.jar:(.text+0x6a): undefined reference to `org::eclipse::swt::layout::RowLayout::class$'
cctpKA4O.jar:(.text+0x79): undefined reference to `org::eclipse::swt::layout::RowLayout::RowLayout()'
cctpKA4O.jar:(.text+0xde): undefined reference to `org::eclipse::swt::widgets::Label::class$'

then i replaced the file /usr/lib/gcj/swt-gtk-3.7.2.jar.so which is generated by gcj myself it's ok.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: libswt-gtk-3-java-gcj 3.7.2-2 [modified: usr/lib/gcj/swt-gtk-3.7.2.jar.so]
ProcVersionSignature: Ubuntu 3.2.0-37.58-generic-pae 3.2.35
Uname: Linux 3.2.0-37-generic-pae i686
ApportVersion: 2.0.1-0ubuntu17.1
Architecture: i386
Date: Sun Feb 3 21:10:08 2013
InstallationMedia: Kubuntu 12.04 LTS "Precise Pangolin" - Release i386 (20120423)
MarkForUpload: True
SourcePackage: swt-gtk
UpgradeStatus: No upgrade log present (probably fresh install)