[MPICH] about C++ and SEEK_SET

[Rajeev Thakur]

You can include mpi.h before including stdio.h or iostream. 
OR 
You can pass -DMPICH_IGNORE_CXX_SEEK as an argument when compiling your
program.

Rajeev
 

> -----Original Message-----
> From: owner-mpich-discuss at mcs.anl.gov 
> [mailto:owner-mpich-discuss at mcs.anl.gov] On Behalf Of Zaiwen
> Sent: Monday, November 21, 2005 10:24 AM
> To: mpich-discuss
> Subject: [MPICH] about C++ and SEEK_SET
> 
> 
> 
> Hi, I encountered a problem during making package "Trilinos" 
> with mpi. The error information was:
> 
> SEEK_SET is #defined but must not be for the C++ binding of MPI
> 
> 
> The following is the solution from mpich2 FAQ:
> ------------------------------------------------
> C++ and SEEK_SET
> Some users may get error messages such as 
>     SEEK_SET is #defined but must not be for the C++ binding of MPI
> 
> The problem is that both stdio.h and the MPI C++ interface 
> use SEEK_SET, SEEK_CUR, and SEEK_END. This is really a bug in 
> the MPI-2 standard. You can try adding 
>     #undef SEEK_SET
>     #undef SEEK_END
>     #undef SEEK_CUR
> 
> before mpi.h is included, or add the definition 
>     -DMPICH_IGNORE_CXX_SEEK
> 
> to the command line (this will cause the MPI versions of 
> SEEK_SET etc. to be skipped). 
> ------------------------------------------------
> 
> 
> I've tried the first solution -- modify every include file 
> and c++ source file which errors occured. However, I can't 
> get through compiling a file "ml_agg_min_energy.cpp". It 
> required definitions of "SEEK_SET, SEEK_END, SEEK_CUR" for 
> "stdio.h". I can not figure out which ".h" file introduced 
> such confliction although I change the order of declaration 
> of "stdio.h" and "mpi.h" in some files.
> 
> 
> My questions is :
> 	1.  Is there any simple solution rather modifing file by file?
> 
> 	2.  How to figure out the second solution, say, how to 
> add the definition  "  -DMPICH_IGNORE_CXX_SEEK" to the 
> command line ? The meaning is vague here.   Is this solution 
> simpler than the first solution? 
> 
> 
> Thank you so much!
> 
> 
> With my Best!
> Zaiwen
> 
> 
> 
> 
>