Tesseract 4 is known to not work on big endian. Stefan (on CC) is excited to take a look if someone can give him access to a big endian machine.
There are no known endian problems with Tesseract 3 or Leptonica, but if any are definitively found they will get immediate attention. I am not going to apply this patch in Debian right now. Instead will send it upstream for consideration. https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=849094
