memory problem

[Deepan <deepan@novaglobal.com.sg>]

Hi,
  My fortran code compiles fine if i use arrays of size less that 4 GB.
When i increase the array size to more that 4 GB, the compilation fails
with the following error. I am running this on 32GB RAM machine.

$  g77 -O3 MAIN.o write_output.o read_population.o write_population.o
collide.o initial_conditions.o stream.o communicate.o -o lbm.x
-I/usr/local/include -L/usr/local/lib -lmpich -lpthread -lrt
MAIN.o(.text+0x7a): In function `MAIN__':
: relocation truncated to fit: R_X86_64_PC32 directions_
read_population.o(.text+0x252): In function `read_population__':
: relocation truncated to fit: R_X86_64_PC32 directions_
read_population.o(.text+0x273): In function `read_population__':
: relocation truncated to fit: R_X86_64_PC32 directions_
read_population.o(.text+0x294): In function `read_population__':
: relocation truncated to fit: R_X86_64_PC32 directions_
read_population.o(.text+0x2b5): In function `read_population__':
: relocation truncated to fit: R_X86_64_PC32 directions_
read_population.o(.text+0x2d6): In function `read_population__':
: relocation truncated to fit: R_X86_64_PC32 directions_
read_population.o(.text+0x2f7): In function `read_population__':
: relocation truncated to fit: R_X86_64_PC32 directions_
read_population.o(.text+0x318): In function `read_population__':
: relocation truncated to fit: R_X86_64_PC32 directions_
read_population.o(.text+0x339): In function `read_population__':
: relocation truncated to fit: R_X86_64_PC32 directions_
read_population.o(.text+0x35a): In function `read_population__':
: relocation truncated to fit: R_X86_64_PC32 directions_
read_population.o(.text+0x37b): In function `read_population__':
: additional relocation overflows omitted from the output
collect2: ld returned 1 exit status





I guess there must me some option to g77, that will let the program
use more than 4 GB of memory. 
If someone knows how to resolve this issue, please tell me,
Thanks
Deepan Chakravarthy N 
www.codeshepherd.com