cannam@95: Next: Linking and Initializing MPI FFTW, cannam@95: Previous: Distributed-memory FFTW with MPI, cannam@95: Up: Distributed-memory FFTW with MPI cannam@95:
All of the FFTW MPI code is located in the mpi subdirectory of
cannam@95: the FFTW package. On Unix systems, the FFTW MPI libraries and header
cannam@95: files are automatically configured, compiled, and installed along with
cannam@95: the uniprocessor FFTW libraries simply by including
cannam@95: --enable-mpi in the flags to the configure script
cannam@95: (see Installation on Unix).
cannam@95:
cannam@95:
cannam@95:
Any implementation of the MPI standard, version 1 or later, should
cannam@95: work with FFTW. The configure script will attempt to
cannam@95: automatically detect how to compile and link code using your MPI
cannam@95: implementation. In some cases, especially if you have multiple
cannam@95: different MPI implementations installed or have an unusual MPI
cannam@95: software package, you may need to provide this information explicitly.
cannam@95:
cannam@95:
Most commonly, one compiles MPI code by invoking a special compiler
cannam@95: command, typically mpicc for C code. The configure
cannam@95: script knows the most common names for this command, but you can
cannam@95: specify the MPI compilation command explicitly by setting the
cannam@95: MPICC variable, as in ‘./configure MPICC=mpicc ...’.
cannam@95:
cannam@95:
cannam@95:
If, instead of a special compiler command, you need to link a certain
cannam@95: library, you can specify the link command via the MPILIBS
cannam@95: variable, as in ‘./configure MPILIBS=-lmpi ...’. Note that if
cannam@95: your MPI library is installed in a non-standard location (one the
cannam@95: compiler does not know about by default), you may also have to specify
cannam@95: the location of the library and header files via LDFLAGS and
cannam@95: CPPFLAGS variables, respectively, as in ‘./configure
cannam@95: LDFLAGS=-L/path/to/mpi/libs CPPFLAGS=-I/path/to/mpi/include ...’.
cannam@95:
cannam@95:
cannam@95:
cannam@95: