[mpich-discuss] hydra and mpich2-1.3rc1

[Pavan Balaji]

Hi Bryan,

Yup, I can reproduce the bug now. See below for more information.

> $MPI_SRC/configure \
>  --with-device=ch3:nemesis \
>  --enable-fast \
>  --enable-threads \
>  --enable-debuginfo \
>  --enable-shared \
>  --enable-sharedlibs=gcc \
>  --enable-f77 \
>  --enable-fc \
>  --enable-cxx \
>  --enable-romio \
>  --with-pm=mpd:hydra \
>  --without-mpe \
>  --prefix=$MPI_INSTALL/$CVER \
>  > configure.log 2>&1

You still seem to be forcing MPD to be the default process manager, and hydra to be the secondary PM. If you remove the --with-pm=... line, you can get hydra by default. This case should work correctly.

The problem you are seeing is because of a combination of --enable-shared and using Hydra as the secondary PM. In this case, libtool wants us to use "make install" to install mpiexec executable. However, since both MPD and Hydra will create an mpiexec executable, just doing "make install" directly will cause one of them to overwrite the mpiexec created by the other. We had some workaround for this in src/pm/hydra/Makefile.am (see the install-alt target, which tries to rename mpiexec to mpiexec.hydra), but that's clearly not sufficient for shared library builds where libtool wants to manage the executables. I'll try to workaround this problem and commit a patch soon.

 -- Pavan