Today I got an email from Elbert Pol,
Just let you know i compile Diffpdf to OS/2 using Qt v4.7.3
Get it @Â ftp://ftp.netlabs.org/pub/qtap
ps/diffpdf-2.1.2-os2.zip
I have no OS/2, so I have not tried it yet, and if you have question, please leave a message, and I will let Elbert Pol know.
btw, Diffpdf windows static version 2.1.2 also released with minor changes.