Some other MPI installation is interfering with MPIUNI. In $PETC_DIR/include/mpiuni/mpi.h, we #define MPI_Init to Petsc_MPI_Init. Thus, in the compile of ex2.c, some other mpi.h is being picked up. You can see which one using gcc -E.
Matt On 1/19/07, #DOMINIC DENVER JOHN CHANDAR# <DOMI0002 at ntu.edu.sg> wrote: > > > Hi, > > Ive installed the serial version of petsc couple of months back > sucessfully. I did it again just now on Itanium-64 with the compiler options > mpi=0. Just wondering, although libmpiuni.a is getting linked, i still get > undefined ref to MPI_Init()? Any clues ? > > gcc -c -Wall -g3 -I/home/pdominic/petsc-2.2.1 > -I/home/pdominic/petsc-2.2.1/bmake/linux-gnu-ia64-intel > -I/home/pdominic/petsc-2.2.1/include > -I/home/pdominic/petsc-2.2.1/include/mpiuni -DPETSC_USE_BOPT_g > -DPETSC_USE_EXTERN_CXX -D__SDIR__="src/ksp/examples/tests/" > ex2.c > > gcc -Wall -g3 > -Wl,-rpath,/home/pdominic/petsc-2.2.1/lib/libg/linux-gnu-ia64-intel > -o ex2 ex2.o -L/home/pdominic/petsc-2.2.1/lib/libg/linux-gnu-ia64-intel > -lpetscksp -lpetscdm -lpetscmat -lpetscvec -lpetsc > > -L/usr/X11R6/lib -lX11 > > > > > -Wl,-rpath,/usr/lib -L/usr/lib -llapack -Wl,-rpath,/usr/lib -L/usr/lib > -lblas > -Wl,-rpath,/usr/src/gcc-3.0.4-build2/lib/gcc-lib/ia64-unknown-linux/3.0.4 > -L/usr/src/gcc-3.0.4-build2/lib/gcc-lib/ia64-unknown-linux/3.0.4 > -lg2c -L/home/pdominic/petsc-2.2.1/lib/libg/linux-gnu-ia64-intel -lmpiuni > -ldl -ldl -ldl -ldl -lm -lg2c -lm > -L/usr/local/lib/gcc-lib/ia64-unknown-linux/3.0.4 > -L/usr/local/lib/gcc-lib/ia64-unknown-linux/3.0.4/../../.. > -lm > ex2.o: In function `main': > > /home/pdominic/petsc-2.2.1/src/ksp/examples/tests/ex2.c:31: > undefined reference to `MPI_Init' > /home/pdominic/petsc-2.2.1/src/ksp/examples/tests/ex2.c:33: > undefined reference to `MPI_Finalize' > collect2: ld returned 1 exit status > make: [ex2] Error 1 (ignored) > rm -f ex2.o > > > Regards, > Dominic -- One trouble is that despite this system, anyone who reads journals widely and critically is forced to realize that there are scarcely any bars to eventual publication. There seems to be no study too fragmented, no hypothesis too trivial, no literature citation too biased or too egotistical, no design too warped, no methodology too bungled, no presentation of results too inaccurate, too obscure, and too contradictory, no analysis too self-serving, no argument too circular, no conclusions too trifling or too unjustified, and no grammar and syntax too offensive for a paper to end up in print. -- Drummond Rennie
