The libstdc++2.10-glibc2.2 package is not on the Ubuntu Hardy 8.04 Linux repositories so it can't be installed using apt-get or synaptic package manager.
$ sudo apt-get install libstdc++2.10-glibc2.2
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package libstdc++2.10-glibc2.2 is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or is only available from another source
E: Package libstdc++2.10-glibc2.2 has no installation candidate
In order to install libstdc++2.10-glibc2.2 on Ubuntu hardy 8.04 Linux, you need to download libstdc++2.10-glibc2.2_2.95.4-24_i386.deb and install it using dpkg:
sudo dpkg --install libstdc++2.10-glibc2.2_2.95.4-24_i386.deb
libstdc++2.10-glibc2.2 contains libstdc++-libc6.2-2.so.3 which is required by Eclipse tptp agent controller, Eclipse based Java profiler.
The upgrade from Ubuntu Gutsy 7.10 Linux to Ubuntu Hardy 8.04 Linux removes the package. Because of this the Eclipse tptp Agent Controller fails to start.
Starting Agent Controller.
ACServer: error while loading shared libraries: libstdc++-libc6.2-2.so.3: cannot open shared object file: No such file or directory
ACServer failed to start.