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

[Pavan Balaji]

It's "CFLAGS", not "CFLAG".

  -- Pavan

On 06/25/2011 08:42 AM, clara wrote:
> I executed the following command:
> ./configure --prefix=/mnt/lux/git/pios/xc/mpich2-32 --with-pm=gforker
> --disable-faster CFLAG=-m32 CXXFLAGS=-m32 FFLAGS=-m32 FCFLAGS=-m32
>
> and got the below errors:
> configure: error: ****  Incompatible Fortran and C Object File Types!  ****
> F77 Object File Type produced by "gfortran -m32 " is : : ELF 32-bit LSB
> relocatable, Intel 80386, version 1 (SYSV), not stripped.
>   C  Object File Type produced by "gcc    -O2" is : : ELF 64-bit LSB
> relocatable, x86-64, version 1 (SYSV), not stripped.
>
> Is there any simple way setting -m32 in order to build 32-bit libraries
> on 64-bit system?
>
> - Clara
>
> On Fri, Jun 24, 2011 at 11:53 AM, Anthony Chan <chan at mcs.anl.gov
> <mailto: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 <mailto: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
>      > >
>      >
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-- 
Pavan Balaji
http://www.mcs.anl.gov/~balaji