I saw a same question asked on the mailing list(date back to last year),
but it was not answered.
Can I somehow make the code compiled by gfortran compatible to the code
compiled by g77? Because symbol name in lots of libraries are g77
compitable. Here is a concrete example,
I tried to compile the following mpi programs with g77(the fotran
compiler under the directory /usr/bin on my machine) and gfotran (the
fortran compiler I generated from gcc 4.0.2)
#/usr/bin/g77 -c test.f
#nm test.o
00000029 T MAIN__
U mpi_comm_rank__
U mpi_comm_size__
U mpi_finalize__
U mpi_init__
#/home/gcc402/bin/gfortran -c test.f
#nm test.o
00000000 T MAIN__
U mpi_comm_rank_
U mpi_comm_size_
U mpi_finalize_
U mpi_init_
--------------------test.f-------------
program main
include 'mpif.h'
double precision PI25DT
parameter (PI25DT = 3.141592653589793238462643d0)
double precision mypi, pi, h, sum, x, f, a
integer n, myid, numprocs, i, rc
c function to integrate
f(a) = 4.d0 / (1.d0 + a*a)
call MPI_INIT( ierr )
call MPI_COMM_RANK( MPI_COMM_WORLD, myid, ierr )
call MPI_COMM_SIZE( MPI_COMM_WORLD, numprocs, ierr )
30 call MPI_FINALIZE(rc)
stop
end