Product specifications

5–Using QLogic MPI
QLogic MPI Details
IB6054601-00 H 5-7
A
Configuring MPI Programs for QLogic MPI
When configuring an MPI program (generating header files and/or Makefiles) for
QLogic MPI, you usually need to specify mpicc, mpicxx, and so on as the
compiler, rather than gcc, g++, etc.
Specifying the compiler is typically done with commands similar to the following,
assuming that you are using sh or bash as the shell:
$ export CC=mpicc
$ export CXX=mpicxx
$ export F77=mpif77
$ export F90=mpif90
$ export F95=mpif95
The shell variables will vary with the program being configured, but these
examples show frequently used variable names. If you use csh, use commands
similar to the following:
$ setenv CC mpicc
You may need to pass arguments to configure directly, for example:
$ ./configure -cc=mpicc -fc=mpif77 -c++=mpicxx
-c++linker=mpicxx
You may also need to edit a Makefile to achieve this result, adding lines similar to:
CC=mpicc
F77=mpif77
F90=mpif90
F95=mpif95
CXX=mpicxx
In some cases, the configuration process may specify the linker. QLogic
recommends that the linker be specified as mpicc, mpif90, etc. in these cases.
This specification automatically includes the correct flags and libraries, rather than
trying to configure to pass the flags and libraries explicitly. For example:
LD=mpicc
LD=mpif90
These scripts pass appropriate options to the various compiler passes to include
header files, required libraries, etc. While the same effect can be achieved by
passing the arguments explicitly as flags, the required arguments may vary from
release to release, so it is good practice to use the provided scripts.