Serial Petsc .... But undefined reference to MPI_Init()?

[#DOMINIC DENVER JOHN CHANDAR#]

Hi,
   Thanks, As you said, I found that mpi.h was being obtained from
/usr/src/mpich-1.2.5 and this call was from petsc.h ..no wonder how that
came ?Anyways, I made a clean build replacing it by the mpi.h from
mpiuni/mpi.h and all went fine.

Regs,
Dominic 

-----Original Message-----
From: owner-petsc-users at mcs.anl.gov
[mailto:owner-petsc-users at mcs.anl.gov] On Behalf Of Matthew Knepley
Sent: Saturday, January 20, 2007 12:57 AM
To: petsc-users at mcs.anl.gov
Subject: Re: Serial Petsc .... But undefined reference to MPI_Init()?

Some other MPI installation is interfering with MPIUNI. In
$PETC_DIR/include/mpiuni/mpi.h, we #define MPI_Init to Petsc_MPI_Init.
Thus, in the compile of ex2.c, some other mpi.h is being picked up. You
can see which one using gcc -E.

  Matt

On 1/19/07, #DOMINIC DENVER JOHN CHANDAR# <DOMI0002 at ntu.edu.sg> wrote:
>
>
> Hi,
>
>      Ive installed the serial version of petsc couple of months back 
> sucessfully. I did it again just now on Itanium-64 with the compiler 
> options mpi=0. Just wondering, although libmpiuni.a is getting linked,

> i still get undefined ref to MPI_Init()? Any clues ?
>
> gcc -c -Wall -g3 -I/home/pdominic/petsc-2.2.1 
> -I/home/pdominic/petsc-2.2.1/bmake/linux-gnu-ia64-intel
> -I/home/pdominic/petsc-2.2.1/include
> -I/home/pdominic/petsc-2.2.1/include/mpiuni -DPETSC_USE_BOPT_g 
> -DPETSC_USE_EXTERN_CXX -D__SDIR__="src/ksp/examples/tests/"
> ex2.c
>
> gcc  -Wall -g3
> -Wl,-rpath,/home/pdominic/petsc-2.2.1/lib/libg/linux-gnu-ia64-intel
>  -o ex2 ex2.o  
> -L/home/pdominic/petsc-2.2.1/lib/libg/linux-gnu-ia64-intel
> -lpetscksp -lpetscdm -lpetscmat -lpetscvec -lpetsc
>
>  -L/usr/X11R6/lib -lX11
>
>
>
>
> -Wl,-rpath,/usr/lib -L/usr/lib -llapack -Wl,-rpath,/usr/lib -L/usr/lib

> -lblas
> -Wl,-rpath,/usr/src/gcc-3.0.4-build2/lib/gcc-lib/ia64-unknown-linux/3.
> 0.4
> -L/usr/src/gcc-3.0.4-build2/lib/gcc-lib/ia64-unknown-linux/3.0.4
> -lg2c -L/home/pdominic/petsc-2.2.1/lib/libg/linux-gnu-ia64-intel 
> -lmpiuni -ldl -ldl -ldl -ldl -lm  -lg2c -lm
> -L/usr/local/lib/gcc-lib/ia64-unknown-linux/3.0.4
> -L/usr/local/lib/gcc-lib/ia64-unknown-linux/3.0.4/../../..
> -lm
> ex2.o: In function `main':
>
> /home/pdominic/petsc-2.2.1/src/ksp/examples/tests/ex2.c:31:
> undefined reference to `MPI_Init'
> /home/pdominic/petsc-2.2.1/src/ksp/examples/tests/ex2.c:33:
> undefined reference to `MPI_Finalize'
> collect2: ld returned 1 exit status
> make: [ex2] Error 1 (ignored)
> rm -f ex2.o
>
>
> Regards,
> Dominic


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