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
