[mpich-discuss] Linking problem (underscore prefix)

Mon Oct 4 13:01:34 CDT 2010

Hi Jayesh,

  Thanks for your reply. Well, I tried compiling MPICH2 with Intel compiler
but it failed during "configure" with the following error message:

-------------------

configure: error: Unable to configure with Fortran support because configure
could not determine the size of a Fortran INTEGER.  Consider setting
CROSS_F77
_SIZEOF_INTEGER to the length in bytes of a Fortran INTEGER

-------------------

I am attaching the config.log created while configuring MPICH2 with Intel
compiler.

So as of now, MPICH2 and parallel netcdf are built with gcc and gfortran.
Whereas my application is being built with Intel compiler (it is a
requirement to use Intel compiler). So, there is some naming convention
issue here I guess.

Thanks & Regards,
Kunal
On Mon, Oct 4, 2010 at 10:16 AM, Jayesh Krishna <jayesh at mcs.anl.gov> wrote:

> Hi,
>  Did you try using the same compiler (Intel compiler) for building MPICH2,
> netcdf & your application ?
>
> Regards,
> Jayesh
> ----- Original Message -----
> From: "Kunal Rao" <kunalgrao at gmail.com>
> To: mpich-discuss at mcs.anl.gov
>   Cc: parallel-netcdf at lists.mcs.anl.gov
> Sent: Monday, October 4, 2010 11:19:04 AM GMT -06:00 US/Canada Central
> Subject: Re: [mpich-discuss] Linking problem (underscore prefix)
>
>
> Hi
>
>
> As discussed before, I was able to create the parallel netcdf library on
> Windows using the cygwin environment. I am having some issues while linking
> this library with my application built with intel compilers ( I am using
> intel compilers also through cygwin ).
>
>
> I know this kind of setup is not supported, but I would like to get your
> inputs on this. Here is what I did:
>
>
> 1) The libpnetcdf.a library was created in /usr/local/lib folder. I built
> libpnetcdf.lib library from this *.a library through the lib.exe tool as
> follows:
>
>
> $ lib.exe /OUT:libpnetcdf.lib libpnetcdf.a
>
>
> 2) Now, I am trying to link this libpnetcdf.lib library with my application
> ( using Intel compilers for building the application ). But while linking, I
> am getting 28 unresolved external symbol (all related to the libpnetcdf.lib
> library) errors such as this:
>
>
> ------------
> io_ncmpi_def_dims.o : error LNK2019: unresolved external symbol
> ncmpi_def_dim referenced in function io_ncmpi_def_dims_
> -----------
>
>
> 3) When I checked in io_ncmpi_def_dim.o file for the symbol using : $
> dumpbin.exe /SYMBOLS io_ncmpi_def_dim.o
>
> I see this symbol as follows:
>
> -----------
> 008 00000000 UNDEF notype () External | ncmpi_def_dim
> -----------
>
>
>
> 4) When I check the same symbol in the libpnetcdf.lib library, I see it as
> follows:
>
> -----------
> 01B 00000000 UNDEF notype () External | _ncmpi_def_dim
> -----------
>
>
>
> So basically, there is an underscore prefix in the symbol in the library
> where as it is not there in the object file. Any thoughts on how to resolve
> this ?
>
>
> Thanks & Regards,
> Kunal
>
>
> On Sat, Oct 2, 2010 at 7:11 PM, Kunal Rao < kunalgrao at gmail.com > wrote:
>
>
> Hi
>
>
> I was able to configure and build the parallel netcdf library on Windows
> using the cygwin environment and MPICH2 as the MPI implementation. I still
> have to check if this library works with the application that I am trying to
> link it to.
>
>
> Here are the steps that I have followed:
> a) Downloaded the MPICH2 source code (1.2.1p1) from
> http://www.mcs.anl.gov/research/projects/mpich2/
> b) Did the regular configure/make/make install steps in the cygwin
> environment in Windows.
> ( set C compiler as gcc and Fortran compiler as gfortran)
> c) Downloaded parallel netcdf (parallel-netcdf-1.2.0.tar.gz) from
> http://trac.mcs.anl.gov/projects/parallel-netcdf/wiki/Download
> d) Again, did the regular configure/make/make install steps for parallel
> netcdf in cygwin environment in Windows and used the previously built MPICH2
> as the mpi implementation ( for the --with-mpi option)
>
>
> The steps went fine and the libpnetcdf.a library has been built on Windows
> through the cygwin environment. I will next check if this links properly and
> works with the application.
>
>
> Thanks & Regards,
> Kunal
>
>
>
>
>
> On Sat, Oct 2, 2010 at 2:49 PM, Jayesh Krishna < jayesh at mcs.anl.gov >
> wrote:
>
>
> Hi,
> As Rob mentioned the error might be due to the way netcdf checks for MPI-IO
> support.
> Can you give us details on how you configure netcdf with MPICH2 ?
>
> (PS: MPI-IO is available with MPICH2 on windows even if you use the
> installers for your installation.)
>
>
> Regards,
> Jayesh
> ----- Original Message -----
> From: "Kunal Rao" < kunalgrao at gmail.com >
> To: mpich-discuss at mcs.anl.gov
>
>
>
> Sent: Saturday, October 2, 2010 12:08:52 PM GMT -06:00 US/Canada Central
> Subject: Re: [mpich-discuss] query on MPICH2 on Windows
>
>
> Hi
>
>
> Initially, I had used the installers availabe at the MPICH 2 website and
> that was giving the error mentioned before. I then, downloaded
> the source code and built MPICH2 from that (configure/make/make install) in
> cygwin and linked this MPI while configuring parallel
> netcdf. Now, it is not giving that error and it moved ahead.
>
>
> Thanks & Regards,
> Kunal
>
>
> On Fri, Oct 1, 2010 at 8:18 PM, Jayesh Krishna < jayesh at mcs.anl.gov >
> wrote:
>
>
> Hi,
> Did you build MPICH2 from source (configure/make/make install) under cygwin
> environment ? Or did you install MPICH2 using installers available at the
> MPICH2 website ?
>
> Regards,
> Jayesh
>
>
>
> ----- Original Message -----
> From: "Kunal Rao" < kunalgrao at gmail.com >
> To: mpich-discuss at mcs.anl.gov
> Sent: Friday, October 1, 2010 5:01:38 PM GMT -06:00 US/Canada Central
> Subject: [mpich-discuss] query on MPICH2 on Windows
>
>
>
> Hi
>
>
> Does MPICH2 on Microsoft Windows support MPI-IO ?
>
>
> I was checking on this site
> http://www.mcs.anl.gov/research/projects/romio/ where it says that ROMIO
> is included as a part of MPICH 2.
>
>
> The reason I ask this is because I am trying to configure parallel netcdf
> library on Windows through the cygwin environment. While doing "configure"
> it stops with the following message:
>
>
>
> ----------------
>
>
> checking MPI-IO support in MPI implementation... configure: error: mpi
> implementation does not support MPI-IO
>
>
> ---------------
>
>
> The MPI implementation I used is MPICH2 which I was assuming supported
> MPI-IO on Windows as well. I tried using MSMPI but even that stopped with
> the same message. Any thoughts on this ?
>
>
> Thanks & Regards,
> Kunal
>
>
>
>
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