Being x86-64 contains two sets of libraries lib & lib64, we need to pass compile flags to point the makefiles to the correct library. Two ways I know of are "linux32" & "-m32".
I recommend searching for both before starting example: man linux32; google/linux for "-m32",
http://marc.theaimsgroup.com/?l=suse-amd64...mpile+32bit&q=b, etc.
If we think of ./configure as a tool to prepare your system to get ready for the makefile, then think "./configure -m32". If you are in a hurry give it a go; but I recommend doing a little reading 1st.
I see NI also has a forum...
Let us know how it turns out...