Running 'ldd mod_wsgi.so' will only work if you are in the same directory as the mod_wsgi.so file.
Explain why you are using such an old version of mod_wsgi. Did you compile mod_wsgi yourself from the source code or did you use the existing binary for mod_wsgi?
If you are compiling the source code, use mod_wsgi 3.4 (the latter), when you create it from the source, do it like:
LD_RUN_PATH=/root/epd-5.1.0/lib make
LD_RUN_PATH Python mod_wsgi.so, , , .