Error while compiling ddi

gcc -DLINUX -m64 -O3 -fstrict-aliasing -I./ -Dgetarg_=_gfortran_getarg_i4 -Diargc_=_gfortran_iargc -DDDI_SOC -DUSE_SYSV -DMAX_SMP_PROCS=8 -DMAX_NODES=128 -o ddi_index.o -c ddi_index.c

ddi_index.c: In function ‘DDI_Fence_check’:
ddi_index.c:344:31: warning: cast from pointer to integer of different size
unset echo