[mpich-discuss] issues when writing a simple makefile to build MPI programs

[clara]

Thanks a lot.

On Fri, Jun 24, 2011 at 11:53 AM, Anthony Chan <chan at mcs.anl.gov> wrote:

>
> You need to rebuild mpich2 for 32bit.  Set CFLAGS/CXXFLAGS/FFLAGS/FCFLAGS
> to -m32 (assume your system has the 32bit support).
>
> BTW, your install of 1.2.1p1 mpich2 is old, please upgrade if possible
> (the latest stable release is 1.4)
>
> A.Chan
>
> ----- Original Message -----
> > I think the default installed mpich2 in 64-bit ubuntu is in x86_64
> > mode.
> > When I try to compile/link an MPI program in 32-bit mode, there is an
> > error
> > below:
> > /usr/lib/libmpich.so: file not recognized: File format not recognized
> >
> > How can I configure the compile/link flags? Do I need to rebuild
> > mpich2 to
> > get a 32-bit libraries? Or is there any 32-bit libraries coexisted
> > with
> > 64-bit libraries? Thanks.
> >
> > Below is the output version information of the default installed
> > MPICH2:
> > MPICH2 Version: 1.2.1p1
> > MPICH2 Release date: Unknown, built on Tue Apr 27 15:06:31 UTC 2010
> > MPICH2 Device: ch3:nemesis
> > MPICH2 configure: --build=x86_64-linux-gnu --prefix=/usr
> > --includedir=${prefix}/include --mandir=${prefix}/share/man
> > --infodir=${prefix}/share/info --sysconfdir=/etc --localstatedir=/var
> > --libexecdir=${prefix}/lib/mpich2 --disable-maintainer-mode
> > --disable-dependency-tracking --disable-silent-rules --srcdir=.
> > --enable-sharedlibs=gcc --prefix=/usr --enable-f90
> > --sysconfdir=/etc/mpich2
> > --includedir=/usr/include/mpich2 --docdir=/usr/share/doc/mpich2
> > MPICH2 CC: gcc -g -O2 -g -Wall -O2 -O2
> > MPICH2 CXX: c++ -g -O2 -g -Wall -O2 -O2
> > MPICH2 F77: gfortran -g -O2 -O2
> > MPICH2 F90: f95 -O2
> >
> > - Clara
> >
> > On Fri, Jun 24, 2011 at 12:08 AM, Pavan Balaji <balaji at mcs.anl.gov>
> > wrote:
> >
> > > Clara,
> > >
> > >
> > > On 06/23/2011 10:53 PM, clara wrote:
> > >
> > >> If I only use shared memory communication among processes on a
> > >> single
> > >> node, how can I configure the mpich2.1.4 (except --with-pm=gforker)
> > >> in
> > >> order to link libraries as little as possible?
> > >>
> > >
> > > Shared memory communication support comes by default in MPICH2. You
> > > don't
> > > need to pass any special configure options; not even
> > > --with-pm=gforker.
> > > Unfortunately, all libraries are still required to be linked with
> > > even when
> > > only shared memory support is needed.
> > >
> > >  -- Pavan
> > >
> > >
> > > --
> > > Pavan Balaji
> > > http://www.mcs.anl.gov/~balaji
> > >
> >
> > _______________________________________________
> > mpich-discuss mailing list
> > mpich-discuss at mcs.anl.gov
> > https://lists.mcs.anl.gov/mailman/listinfo/mpich-discuss
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