OK I can confirm that iRex's tool chain works on Debian 3.1r3 but they didn't include their autoconf. I guessed wrong autoconf 1.9 and had to hand repair the Makefiles.
Feedback to iRex, please document the autoconf to use or, even better, include it in the tool chain.
I compiled ipdf and it's now working on my 2.7 (still unpatched to 2.7.1) iLiad.
I've spent a fair amount of time trying to re-flow PDF for my Librie, it's a mess. I have hopes for the new format and with the tools provided one could build a viewer for it. But at present there is no way to test/deploy it unless you have an exploitable 2.7 iLiad (and are willing to exploit it

).
I used lsof to confirm my code was running, 515366 is the size of the file, I didn't strip my ipdf.
Code:
xpdf 943 root cwd DIR 100,2 1024 2 /
xpdf 943 root rtd DIR 100,2 1024 2 /
xpdf 943 root txt REG 3,1 515366 56 /media/cf/ipdf