Re: "relocation overflow" and "relocation truncated to fit errors" for Fortran application with g77 compiler

[Tim Prince <TimothyPrince at sbcglobal dot net>]

sameer sinha wrote:
> My code (FORTRAN 77) successfully compiled on 32 bit Xeon cluster with
> 8 GB RAM(RHEL platform)
> but when
> I am using a 64-bit AMD apteron cluster with 8 GB RAM (RHEL platform).
> I face "relocation overflow" and "relocation truncated to fit errors"
> when I compile big fortran 77 codes using f77/g77 (even with ifort and
> pathf95) on it. Though it compiles successfully it cannot assemble or
> link the executables. I understand this is because of large arrays or
> so. But the executable size is not more than 2GB. so I could not run
> my codes with large dimensions.

> I am getting this error while compilation
>
> [cdacb@master IIAP]$ mpif77 -o step3.x ccea_MPI.F
> ccea_MPI.F: In subroutine `twoint':
> /tmp/cc5KpcVF.f:3621: warning:
>          call MPI_RECV(maxinp,1,MPI_INTEGER,isource,1,MPI_COMM_WORLD,
>               1
> /tmp/cc5KpcVF.f:3624: (continued):
>          call MPI_RECV(VTWOE,maxinp,MPI_DOUBLE_PRECISION,isource,128,
>               2

That's not a successful compile.  It looks like you have something which 
isn't portable to 64 bit.  That first argument has to be a 64-bit pointer 
in the 64-bit case, as does the last.  You must resolve that before you 
start worrying about why you get >2GB segments.  It is possible for that 
to happen, since some of your data must change from 32- to 64-bit, and 
your code size will increase.