sean yang wrote:
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
AFAIK, every version of MPI includes a system for adapting to the
default underscore-appending scheme of gfortran. That scheme would be
preferable to use of the second_underscore option. In either case,
you'll have to break out TFM. If you are trying to combine g77 and
gfortran, don't. Several versions of MPI also have FAQs and help lists
of their own.
