I don’t know which is the current version of libgettext I’m affraid, but I’ve had success in the past when faced with the same problem with a sound library.
First, I’d check to see which version of the library you have on your system - it’s always possible that you have a newer version than the one mentioned on the command line.
In linux, I always use the locate and updatedb commands. I’d just type “locate libgettextlib-”. If the system won’t do it, complaining about the database being out of date, and not being regenerated within the last 8 days then just type sudo updatedb and find something to do for about 5 mins. If you don’t have locate and updatedb, you can download them with apt-get, though I forget the exact name of the package.
Now with all that done, hopefully you’ll find that you have another version of the library installed. What I do now is copy the library of a different version to a new file that I name after the file that’s not being found. I then make a note of this change in a log file, so that I can undo the change in the event of errors or a package that won’t update properly at a later date, since the system thinks the package is already installed.