[MPICH] mpich2 1.0.3, 32 bits build problem on Redhat ES4, amd64

[chong tan]

thank martin, 
that magically worked, any explanation ?

tan

--- Martin Siegert <siegert at sfu.ca> wrote:

> Hi tan,
> 
> On Wed, Aug 16, 2006 at 05:21:58PM -0700, chong tan
> wrote:
> > using gcc 4.0.2.  The 64bits build works fine.
> > 
> > I am using 2 csh files to do the build, first is a
> > debug build, which works OK :
> > 
> > -----
> > #!/bin/csh -f
> > setenv CFLAGS "-g -m32"
> > setenv CC gcc
> > setenv CXX g++
> > setenv CXXFLAGS "-g -m32"
> > ./configure -prefix=/usr/local/mpich --enable-cxx
> > --disable-f77 --disable-f90
> > make
> > make install
> > ------
> > 
> > The second, which is the optimized , with no
> checking:
> > ---------
> > #!/bin/csh -f
> > setenv CFLAGS "-O2 -m32"
> > setenv CC gcc
> > setenv CXX g++
> > setenv CXXFLAGS "-O2 -m32"
> > ./configure -prefix=/usr/local/mpich_opt
> --enable-fast
> > --enable-cxx --disable-f77 --disabl
> > e-f90
> > make
> > make install
> > --------
> > 
> > when the library is, libmpichcxx.a, is linked with
> an
> > 32 bit application (co,piled -m32), the one built
> with
> > '--enable-fast' causes :
> > 
> > -/usr/bin/ld: skipping incompatible
> > /usr/local/mpich_opt/lib/libmpichcxx.a when
> searching
> > f
> > or -lmpichcxx
> > /usr/bin/ld: cannot find -lmpichcxx
> > collect2: ld returned 1 exit status
> > 
> > appearantly the library is built 64bit even with
> > "-m32".  
> > the difference between the 2 scripts are '-g' and
> > '-O2', and this '--enable-fast'.  
> > 
> > Any suggestion ?
> 
> Try
> 
> setenv CFLAGS "-O2"
> setenv CC "gcc -m32"
> setenv CXX "g++ -m32"
> setenv CXXFLAGS "-O2"
> 
> Cheers,
> Martin
> 
> -- 
> Martin Siegert
> Head, HPC at SFU
> WestGrid Site Lead
> Academic Computing Services                phone:
> (604) 291-4691
> Simon Fraser University                    fax:  
> (604) 291-4242
> Burnaby, British Columbia                  email:
> siegert at sfu.ca
> Canada  V5A 1S6
> 
> 


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