>> As I'm currently facing the same problem, does anybody know the answer?
>> Michele, did you get an answer?

>The simplest option is to add the apt source with build dependencies.
>You have three options for this:
>1) nightly-build-deps - but contain multiple packages that are not needed:
>deb http://ppa.quickbuild.pearsoncomputing.net/trinity/trinity-nightly-builds/debian _distribution_ main
>2) deps-r14 (on build-farm) - contain only the necessary packages:
>deb http://ppa.quickbuild.pearsoncomputing.net/slavek-banko/deps-r14/ubuntu _distribution_ main
>3) deps-r14 (alternative) - same as 2), wider bandwidth, contain packages also for mips
>deb http://mirror.xcer.cz/trinity-sb _distribution_ deps-r14

Hi Michael, 
Slavek already gave you good advice.
Another way is to build libr and gettext-kde from sources, as I do. You can use this sources, from the same Slavek's repo.
deb-src http://mirror.xcer.cz/trinity-sb jessie deps-r14 main-r14
Just replace jessie with the distro you are using.
If you want, you can first browse it at http://mirror.xcer.cz/trinity-sb/dists/

Just for your understanding, to build TDE in Debian and Ubuntu you need some extra packages which are not part of the main TDE repo. libr and gettext-kde are two of them. You  can find the others at the address indicated.
Also when building, remember to bump up the version number of all packages (**EXCEPT** the deps-r14 ones) to 4:14.0.0 to avoid broken dependecies).

Finally, the question you found is part of the TDE developer mailing list. You can find it here (just scroll until you find the correct one) and also see the following discussion.
http://trinity-devel.pearsoncomputing.net/?0:201212

Cheers
  Michele