Aaron,
Instead of trying to correct it with LDFLAGS at load time, Can you use
compiler
options for your code to match the MPI entry points?
Joe
________________________________
From: lam-bounces_at_[hidden] [mailto:lam-bounces_at_[hidden]] On Behalf
Of Aaron Thompson
Sent: Monday, July 09, 2007 11:43 AM
To: General LAM/MPI mailing list
Subject: Re: LAM: Undefined MPI symbols linker error with XLF
Underscores could be the issue. My program is calling MPI functions in
all caps with no underscoring, e.g. MPI_SEND . I tried adding
-fno_underscoring to my LDFLAGS, but that didn't help. Are there any
other flags can I try using?
Thank you,
Aaron Thompson
Vanderbilt University
aaron.p.thompson_at_[hidden]
Could your problem be Case or leading or trailing underscores?
Some code has:
MPI_Send
mpi_send
mpi_send_
_mpi_send_
The code and MPI libs need to have the same Case and underscore
policy.
Regards,
joe Griffin
On Jul 9, 2007, at 1:20 PM, lam-request_at_[hidden] wrote:
cp /usr/local/lammpi/include/mpif.h .
$(MAKE) LD="/opt/ibmcmp/xlf/8.1/bin/xlf -o" \
LDFLAGS="-I/usr/local/lammpi/include -L/usr/local/lammpi/lib
-llammpio -llamf77mpi -lmpi -llam -ldl" \
FC="/opt/ibmcmp/xlf/8.1/bin/xlf" \
FFLAGS="-c -ffast-math -qstrict -O3 -qarch=auto -
qmaxmem=32768 -I/usr/local/lammpi/include" \
EX=$(EX) BINROOT=$(BINROOT) $(TYPE)
Here's the exact error I'm getting:
/usr/bin/ld: Undefined symbols:
_mpi_allreduce_
_mpi_barrier_
_mpi_comm_rank_
_mpi_comm_size_
_mpi_finalize_
_mpi_init_
_mpi_recv_
_mpi_send_
_mpi_irecv_
_mpi_wait_
Thank you!
Aaron Thompson
Vanderbilt University
aaron.p.thompson_at_[hidden]
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