I don't recall how it was exactly, but peops spu had some threading problems, and would nead an specific version of libthread or libpthread or wichever it was. I'd suggest reading the readmes bundled with peops spu, it said something in there.
$ ./epsxe-1.60/epsxe
* Running ePSXe emulator version 1.6.0.
* Memory handlers init.
* ePSXe: PSX BIOS loaded [/home/vince/epsxe-1.60/bios/scph1001.bin].
* Init gpu[0][libgpuPeteXGL2.so.2.0.7]
Error: couldn't get fbconfig
Missing ATI render-texture extension!NVIDIA Corporation
GeForce FX 5900XT/AGP/3DNOW!
* Open gpu[0]
* Init spu[0][libspuPeopsOSS.so.1.0.8]
* Open spu[0]
Segmentation fault