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Subject: Re: [OMPI users] Problems installing in Cygwin - Problem with GCC 3.4.4
From: Gustavo Seabra (gustavo.seabra_at_[hidden])
Date: 2008-11-03 15:36:08

On Mon, Nov 3, 2008 at 3:04 PM, Jeff Squyres wrote:
> On Nov 3, 2008, at 2:53 PM, Gustavo Seabra wrote:
>> Finally, I was *almost* able to compile OpenMPI in Cygwin using the
>> following configure command:
>> ./configure --prefix=/home/seabra/local/openmpi-1.3b1 \
>> --with-mpi-param_check=always --with-threads=posix \
>> --enable-mpi-threads --disable-io-romio \
>> --enable-mca-no-build=memory_mallopt,maffinity,paffinity \
>> --enable-contrib-no-build=vt \
>> FC=g95 'FFLAGS=-O0 -fno-second-underscore' CXX=g++
> For your fortran issue, the Fortran 90 interface needs the Fortran 77
> interface. So you need to supply an F77 as well (the output from configure
> should indicate that the F90 interface was disabled because the F77
> interface was disabled).

Is that what you mean (see below)? I thought the g95 compiler could
deal with F77 as well as F95... If so, could I just pass F77='g95'?

(From the configure output)
*** Fortran 90/95 compiler
checking whether we are using the GNU Fortran compiler... yes
checking whether g95 accepts -g... yes
checking if Fortran compiler works... yes
checking whether g77 and g95 compilers are compatible... no
configure: WARNING: *** Fortran 77 and Fortran 90 compilers are not
link compatible
configure: WARNING: *** Disabling MPI Fortran 90/95 bindings
checking for extra arguments to build a shard library... none needed
checking to see if F90 compiler likes the C++ exception flags...
skipped (no F90 bindings)

>> I then had a very weird error during compilation of
>> ompi/tools/ompi_info/ (See below).
>> The lines causing the compilation errors are:
>> vector.tcc:307: const size_type __len = __old_size +
>> std::max(__old_size, __n);
>> vector.tcc:384: const size_type __len = __old_size +
>> std::max(__old_size, __n);
>> stl_bvector.h:522: const size_type __len = size() + std::max(size(),
>> __n);
>> stl_bvector.h:823: const size_type __len = size() + std::max(size(),
>> __n);
>> (Notice that those are from the standard gcc libraries.)
>> After googling it for a while, I could find that this error is caused
>> because, at come point, the source code being compiled redefined the
>> "max" function with a macro, g++ cannot recognize the "std::max" that
>> happens in those lines and only "sees" a (...), thus printing that
>> cryptic complaint.
>> I looked in some places in the OpenMPI code, but I couldn't find
>> "max" being redefined anywhere, but I may be looking in the wrong
>> places. Anyways, the only way of found of compiling OpenMPI was a very
>> ugly hack: I have to go into those files and remove the "std::" before
>> the "max". With that, it all compiled cleanly.
> I'm not sure I follow -- I don't see anywhere in OMPI where we use std::max.
> What areas did you find that you needed to change?

These files are part of the standard C++ headers. In my case, they sit in:

In principle, the problems that comes from those files would mean that
the OpenMPI source has some macro redefining max, but that's what I
could not find :-(

>> I did try running the tests in the 'tests' directory (with 'make
>> check'), and I didn't get any alarming message, except that in some
>> cases (class, threads, peruse) it printed "All 0 tests passed". I got
>> and "All (n) tests passed" (n>0) for asm and datatype.
>> Can anybody comment on the meaning of those test results? Should I be
>> alarmed with the "All 0 tests passed" messages?
> No. We don't really maintain the "make check" stuff too well.

Oh well... What do you use for testing the implementation?

Thanks a lot!