[mpich2-dev] gfortran on Windows - undefined references

[jayesh at mcs.anl.gov]

Hi,
 The fortran 90 module provided with MPICH2 on windows is for users compiling fortran 90 programs using Intel fortran compiler (on windows).
 Is your program a fortran 90 program (did you try replacing "use mpi" by "include mpif.h") ?
 You might also want to try compiling MPICH2 using gcc+Cygwin .

>> 1. From the definitions in mpif.h (in folder ‘include’), I created a new module MPI (in file mpi.f90) 
 I am not sure that you mean when you say you created a module from definitions in mpif.h .

>> I had used fmpich2g.lib while executing the code...
 I am assuming you meant while compiling your code. You should try linking your code with libfmpich2g.a .

 Let us know if it works for you.

Regards,
Jayesh

----- Original Message -----
From: "Vinit Satav" <vinitsatav at nous.soft.net>
To: mpich2-dev at mcs.anl.gov
Sent: Wednesday, August 18, 2010 2:26:43 AM GMT -06:00 US/Canada Central
Subject: [mpich2-dev] gfortran on Windows - undefined references




When trying to compile my code using gfortran on Windows, I get the following error: 



USE MPI 

1 

Fatal Error: File 'mpi.mod' opened at (1) is not a GFORTRAN module file 

gfortran: Internal error: Aborted (program f951) 



To fix this, I tried the following: 

1. From the definitions in mpif.h (in folder ‘include’), I created a new module MPI (in file mpi.f90) 

2. Compiled mpi.f90 using gfortran to get a new mpi.mod. 

3. Compiled my code using the new module file successfully. 



However, during runtime I got the following error messages: 

undefined reference to `mpi_bcast_' 

undefined reference to `mpi_send_' 

undefined reference to `mpi_bcast_' 

undefined reference to `mpi_recv_' 

undefined reference to `mpi_wait_' 

undefined reference to `mpi_irecv_' 

undefined reference to `mpi_test_' 

undefined reference to `mpi_irecv_' 

undefined reference to `mpi_finalize_' 

undefined reference to `mpi_init_' 

undefined reference to `mpi_comm_rank_' 

undefined reference to `mpi_comm_size_' 

collect2: ld returned 1 exit status 



I had used fmpich2g.lib while executing the code. 



How do I fix these undefined references? 



My system configuration is: 

a. Windows XP SP3 – Intel Core2 Duo 

b. MPICH2-1.2.1p1 (Windows IA32 (binary)) 

c. gfortran (version 4.4.0) – MinGW build 



Regards, 

Vinit Satav 



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