I know, I was running whole 32-bit Mesa and libdrm and libtxc_dxtn on a 64-bit system and I can tell you it is not worth it. It still crashed sometimes and gdb could not recognize the binary format, so I wasn't able to not debug it.

Really, if you want ETQW, the easiest way is to install a 32-bit system with libtxc_dxtn.