Citrix "offer" a 64-bit version of the Receiver for x86_64 Linux, but it is a sham as under the covers it requires a large number of 32-bit libraries and it cannot run against the installed 64-bit versions.

The application looks for these libraries in /usr/lib32.

I'm working-through resolving these requirements on a Gentoo installation but am making use of the good graces of the folk at Canonical for the 32-bit compilations of the libraries that they have prepared.

1. Download and depack the ICA Client Debian package from Citrix:

ar -xv icaclient_12.0.0_amd64.deb
gzip -dc data.tar.gz | tar -xf -

2. Copy the extracted files to /opt/

3. emerge the following Gentoo 32-bit library binary packages:

   emul-linux-x86-xlibs
emul-linux-x86-baselibs
emul-linux-x86-compat
emul-linux-x86-gtklibs
emul-linux-x86-medialibs
emul-linux-x86-sdl
emul-linux-x86-soundlibs

4. Download the OpenMotif binary package from the Ubuntu repository and depack it as in step 1.

5. Copy the libXm.so.4* files extracted in step 4 to /usr/lib32/

6. Try running /opt/Citrix/ICAClient/wfcmgr and see if it complains about a missing file, modules.ini. If so then symlink /opt/Citrix/ICAClient/nls/en/modules.ini to /opt/Citrix/ICAClient/config/modules.ini.

7. ( Specific to Citrix hosting site) Download the Entrust 2048-bit cert and import it into Firefox ( for a processing trick ).

8. In the Certificate Manager of Firefox, export the Entrust 2048-bit cert as an X509 Certificate ( DER ) with a .crt suffix.

9. Copy the .crt file to /opt/Citrix/ICAClient/keystore/cacerts/.

10. Associate wfica with the ICA file type in Firefox.

11. Launch!