QLogic OFED+ Host Software User Guide, Rev. B

4–Running QLogic MPI on QLogic Adapters
QLogic MPI Details
Table 4-5. PathScale Compiler Suite
Compiler
Command
C mpicc -cc=pathcc .....
C++ mpicc -CC=pathCC .....
Fortran 77 mpif77 -fc=pathf95 .....
Fortran 90/95 mpif90 -f90=pathf95 .....
mpif90 -f95=pathf95 .....
NOTE: pathf95 invokes the Fortran 77,
Fortran 90, and Fortran 95 compilers.
Also, use mpif77, mpif90, or mpif95 for linking; otherwise, .true. may have
the wrong value.
If you are not using the provided scripts for linking, link a sample program using
the -show option as a test (without the actual build) to see what libraries to add to
your link line. Some examples of the using the PGI compilers follow.
For Fortran 90 programs:
$ mpif90 -f90=pgf90 -show pi3f90.f90 -o pi3f90
pgf90 -I/usr/include/mpich/pgi5/x86_64 -c -I/usr/include
pi3f90.f90 -c
pgf90 pi3f90.o -o pi3f90 -lmpichf90 -lmpich -lmpichabiglue_pgi5
Fortran 95 programs will be similar to the above.
For C programs:
$ mpicc -cc=pgcc -show cpi.c
pgcc -c cpi.c
pgcc cpi.o -lmpich -lpgftnrtl -lmpichabiglue_pgi5
Compiler and Linker Variables
When you use environment variables (e.g., $MPICH_CC) to select the compiler
mpicc (and others) will use, the scripts will also set the matching linker variable
(for example, $MPICH_CLINKER), if it is not already set. When both the
environment variable and command line options are used (-cc=gcc), the
command line variable is used.
When both the compiler and linker variables are set, and they do not match for the
compiler you are using, the MPI program may fail to link; or, if it links, it may not
execute correctly. For a sample error message, see “Compiler/Linker Mismatch”
on page F-14.
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