Hi, Now I am trying to work on ppc440. And when I compile my program I received this error message while ld: ppc_4xx-ld: fifo_tmp.o(.text+0x6158): R_PPC_PLTREL24 reloc against local symbol fifo_tmp.o: could not read symbols: Bad value I am using ELDK 4.2. The gcc version is 4.2.2 and the ld version is 2.17.50 and the compile flags is as following: /eldk4.2/ppc_4xx/usr/bin/../ cc1 -quiet -nostdinc -v -I/home/joy/work/ppc/partikle//user/ulibc/include -imultilib m403/pic -iprefix /eldk4.2/ppc_4xx/usr/bin/../lib/gcc/powerpc-linux/4.2.2/ -D__unix__ -D__gnu_linux__ -D__linux__ -Dunix -D__unix -Dlinux -D__linux -Asystem=linux -Asystem=unix -Asystem=posix -Dxm_ppc440 fifo.c -quiet -dumpbase fifo.c -mcpu=403 -auxbase-strip fifo.o -O2 -Wall -Wno-pointer-sign -version -fexceptions -fno-builtin -fno-strict-aliasing -fPIC -fno-stack-protector -fomit-frame-pointer -o /tmp/ccOIjGSh.s as -m403 -V -Qy -K PIC -o fifo.o /tmp/ccOIjGSh.s Is there someone know why this is happend and how to resolve it? Thank you.