Re: LAM: Undefined MPI symbols linker error with XLF

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Re: LAM: Undefined MPI symbols linker error with XLF
United States	2007-07-09 13:43:09

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.thompsonvanderbilt.edu">aaron.p.thompsonvanderbilt.edu 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-requestlam-mpi.org">lam-requestlam-mpi.org 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.thompsonvanderbilt.edu">aaron.p.thompsonvanderbilt.edu
Re: LAM: Undefined MPI symbols linker error with XLF
United States	2007-07-09 14:05:51

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-bounceslam-mpi.org [mailto:lam-bounceslam-mpi.org] 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.thompsonvanderbilt.edu">aaron.p.thompsonvanderbilt.edu 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-requestlam-mpi.org">lam-requestlam-mpi.org 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 vanderbilt.edu">aaron.p.thompsonvanderbilt.edu

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