[mpich-discuss] MPICH 2 installation errors

[sasha lambert]

I initially used the gfortran binary provided by the HPC Mac OS X website
at http://hpc.sourceforge.net/ , which happens to be in 32-bit, and
therefore gives rise to the incompatibility issue.
A 64-bit version is available for Mac OS X at
http://gcc.gnu.org/wiki/GFortranBinaries#MacOS .
After this installation, the MPICH configure and make steps performed
smoothly.

Thanks for the help!

Sasha

On Fri, Aug 13, 2010 at 12:50 AM, <chan at mcs.anl.gov> wrote:

>
> > > configure: error: ****  Incompatible Fortran and C Object File
> > Types!  ****
> > > F77 Object File Type produced by "gfortran  -O2" is : : Mach-O
> > object i386.
> > >  C  Object File Type produced by "gcc  -O2" is : : Mach-O 64-bit
> > object x86_64.
> >
> > Yes, this message is a 32/64-bit compatibility issue.  Your fortran
> > compiler is outputting 32-bit by default, but your C compiler is
> > outputting 64-bit by default.  The GNU compilers (and many other
> > compilers) accept "-m32" or "-m64" options to force the corresponding
> > output mode.  The easiest way to set them is usually something like:
> >
> > /path/to/configure CC="gcc -m32" F77="gfortran -m32" FC="gfortran
> > -m32" OTHER_CONFIG_ARGS...
>
> Since you are using MPICH2-1.2.x, you should use F90 (not FC) to
> set Fortran 90+ compiler (FC in 1.2.x and older releases is the
> same as F77), i.e.
>
> /path/to/configure CC="gcc -m32" F77="gfortran -m32" F90="gfortran -m32"
> CXX="g++ -m32" OTHER_CONFIG_ARGS...
>
> In the upcoming 1.3 release, F90/F90FLAGS are being
> replaced by FC/FCFLAGS.  So the configure command will
> be exactly like what Dave said.
>
> A.Chan
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>
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