[mpich-discuss] libmpich.a "No such file or directory"

[sasha lambert]

I tried compiling using mpicc, and nothing seems to happen.
The prompt just reappears and no executable file has been made.

Sasha

On Sun, Aug 15, 2010 at 11:12 AM, Si Hammond <simon.hammond at gmail.com>wrote:

> Have you tried compiling with mpicc?
>
> mpicc -o hello main.c
>
> This sets up the linking etc for you.
>
>
>
> S.
>
>
> On 15 Aug 2010, at 16:02, sasha lambert wrote:
>
> I'm fairly new to unix and mpich, so please bear with me.
>
> I've tried to compile a simple "hello" program below:
>
> /*The Parallel Hello World Program*/
> #include <stdio.h>
> #include <mpi.h>
>
> main(int argc, char **argv)
> {
> int node;
> MPI_Init(&argc,&argv);
> MPI_Comm_rank(MPI_COMM_WORLD, &node);
>
>
> printf("Hello World from Node %d\n",node);
>
>
> MPI_Finalize();
> }
>
> Here is the shell response:
>
> $ gcc main.c -o hello
> Undefined symbols:
>   "_MPI_Comm_rank", referenced from:
>       _main in ccWLoMyo.o
>   "_MPI_Finalize", referenced from:
>       _main in ccWLoMyo.o
>   "_MPI_Init", referenced from:
>       _main in ccWLoMyo.o
> ld: symbol(s) not found
> collect2: ld returned 1 exit status
>
> I tried searching for "MPI_init" in libmpich.a, thinking it might have to
> do with the added underscore in " _MPI_Init".
> Shell response:
>
> $ nm libmpich.a | grep mpi_init
> nm: can't open file: libmpich.a (No such file or directory)
>
> I've added usr/local/lib to the PATH, but still nothing. Any suggestions?
>
> Thanks,
> Sasha
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>
>
>
> ---------------------------------------------------------------------------------------
> Si Hammond
>
> Research Fellow & Knowledge Transfer Associate
> Performance Computing & Visualisation Group
> Department of Computer Science
> University of Warwick, CV4 7AL, UK
> http://go.warwick.ac.uk/hpsg
>
> ----------------------------------------------------------------------------------------
>
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