Unsuccessful build of 3.1 on AIX 5.1

[Walter Landry <wlandry at ucsd dot edu>]

Greetings,

I'm having some problems getting gcc 3.1 to install on my AIX 5.1
machine (uname -a gives AIX b80n01 1 5 00043C7F4C00).  It actually
compiles everything OK, I think.  The only errors I could find were
things like

  gmake[2]: [stage1-start] Error 1 (ignored)

There were no stage3 errors.  However, when I gmake install, at the
end of output I get

  gmake[2]: Entering directory `/rmount/work/ux450362/gcc-3.1_build/powerpc-ibm-aix5.0.0.0/libf2c/libU77'
  gmake[2]: *** No rule to make target `all'.  Stop.
  gmake[2]: Leaving directory `/rmount/work/ux450362/gcc-3.1_build/powerpc-ibm-aix5.0.0.0/libf2c/libU77'
  gmake[1]: *** [u77] Error 2
  gmake[1]: Leaving directory `/rmount/work/ux450362/gcc-3.1_build/powerpc-ibm-aix5.0.0.0/libf2c'
  gmake: *** [install-target-libf2c] Error 2

This doesn't really bother me, since the C++ stuff seems to install
fine.  I can create executables and run them, so I'm happy enough.
However, when I try to run MPI programs, there seem to be problems.
For example, with the simple program

  #include <iostream>
  #include "mpi.h"
  using namespace std;

  int main(int argc, char *argv[])
  {
    MPI_Init(&argc,&argv);
    cout << "Hello" << endl;
    MPI_Finalize();
    return 0;
  }

I compile it with the command 

  /work/ux450362/gcc-3.1_bin/bin/g++ simple.C -o simple -L/usr/lpp/ppe.poe/lib -I/usr/lpp/ppe.poe/include -lmpi

and then run it

  poe ./simple -procs 1 -hfile $HOME/host.list -resd no

I get the output

  ATTENTION: 0031-379  Pool setting ignored when hostfile used
  Hello
  ERROR: 0031-250  task 0: Segmentation fault

The ATTENTION line is, I think, of no concern.  The basic problem is
that the MPI_Finalize() command is segfaulting.  This doesn't happen
with the IBM compiler.  Investigating further, I find that a lot of
the MPI commands return garbage (i.e. the number of nodes is
-124234234 or something like that).  Does anyone know if gcc is
compatible with IBM's MPI implementation?

I've also tried using the -mpe option, but it complains that 

  collect2: /usr/lpp/ppe.poe/lib/crt0.o: cannot open as COFF file

That file doesn't exit.  Should it?

Thanks,
Walter Landry
wlandry@ucsd.edu