[mpich-discuss] Segmentation Fault when running any application.

[Jayesh Krishna]

Hi,
 How were you compiling your code before ?
 A command similar to,

 "gcc -I/cygdrive/c/Progra~1/MPICH2/include -L/cygdrive/c/Progra~1/MPICH2/lib hello.c -o hello.exe -lmpi"

 should work.

Regards,
jayesh

----- Original Message -----
From: "Michael Warthon" <michael.warthon at upr.edu>
To: "Jayesh Krishna" <jayesh at mcs.anl.gov>
Sent: Tuesday, November 15, 2011 12:18:43 PM
Subject: Re: [mpich-discuss] Segmentation Fault when running any application.


Alright. Well I tried it and for some reason it is not able to see the library. 
I used the command: 
gcc -g hello.c -L\mpich_install\lib -lmpi 

It ended up giving me an error saying: 
fatal error: mpi.h: No such file or directory 

On Tue, Nov 15, 2011 at 10:32 AM, Jayesh Krishna < jayesh at mcs.anl.gov > wrote: 


Hi, 
Try using gcc (usual gcc stuff: specify include dirs using "-I", lib dirs using "-L") to compile your code and link it with "-lmpi" . 


Regards, 
Jayesh 

----- Original Message ----- 
From: "Michael Warthon" < michael.warthon at upr.edu > 
To: "Jayesh Krishna" < jayesh at mcs.anl.gov > 



Sent: Tuesday, November 15, 2011 10:16:00 AM 
Subject: Re: [mpich-discuss] Segmentation Fault when running any application. 


What would be the correct command to use in cygwin in order to compile the code? Just want to make sure that I actually compiled it correctly. 


On Tue, Nov 15, 2011 at 10:10 AM, Jayesh Krishna < jayesh at mcs.anl.gov > wrote: 


Hi, 
I just tried compiling your code with cygwin gcc (3.4.4) + MPICH2 1.4.1p1 gcc libs and it worked for me (No seg fault, gives the expected output). 
Make sure that you are using the correct header files and libraries (MPICH2 libs and headers) when you compile your code. 

Regards, 

Jayesh 

----- Original Message ----- 
From: "Michael Warthon" < michael.warthon at upr.edu > 



To: "Jayesh Krishna" < jayesh at mcs.anl.gov > 
Sent: Tuesday, November 15, 2011 9:53:32 AM 
Subject: Re: [mpich-discuss] Segmentation Fault when running any application. 

Ah sorry. I forgot to include the p1 at the end of it. I am using mpich2 1.4.1p1 


On Tue, Nov 15, 2011 at 9:44 AM, Jayesh Krishna < jayesh at mcs.anl.gov > wrote: 


Did you try the latest stable release (1.4.1p1)? 

-Jayesh 


----- Original Message ----- 
From: "Michael Warthon" < michael.warthon at upr.edu > 
To: mpich-discuss at mcs.anl.gov 
Sent: Monday, November 14, 2011 7:54:43 PM 
Subject: [mpich-discuss] Segmentation Fault when running any application. 



Hello, 

I am new to MPI and I went and installed mpich2 1.4.1 onto a windows system that is being used through cygwin. I have compiled the code that simply prints the process and rank as shown below. 



#include <stdio.h> 
#include <mpi.h> 

int main( int argc, char *argv[]) { 

int numprocs, rank, namelen; 
char processor_name[MPI_MAX_PROCESSOR_NAME]; 

MPI_Init(&argc, &argv); 
MPI_Comm_size(MPI_COMM_WORLD, &numprocs); 
MPI_Comm_rank(MPI_COMM_WORLD, &rank); 
MPI_Get_processor_name(processor_name, &namelen); 

printf( "Process %d on %s out of %d\n" , rank, processor_name, numprocs); 

MPI_Finalize(); 
} 

Nothing too complicated. However, I still receive an error from the command line in cygwin that simply reads segmentation fault: (core dumped). The command I used was: 

mpiexec -n 1 a.exe 

No matter what executable I try to run, I still receive the same error. Any help regarding this would be greatly appreciated! 
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