4.9.8. Miscellaneous functionality
The following are command line options that don’t fit any any of the
above categories that can be used with configure
:
--without-memory-manager
: Disable building Open MPI’s memory manager. Open MPI’s memory manager is usually built on Linux based platforms, and is generally only used for optimizations with some OpenFabrics-based networks (it is not necessary for OpenFabrics networks, but some performance loss may be observed without it).Warning
Open MPI’s memory management functionality, which provides important performance optimizations on OS-bypass networks such as InfiniBand, requires the
dlsym(3)
interface, and therefore does not work with fully-static applications.--with-ft=TYPE
: Specify the type of fault tolerance to enable. The only allowed values areulfm
andnone
. See the ULFM section for more details.--enable-peruse
: Enable the PERUSE MPI data analysis interface.--enable-heterogeneous
: Enable support for running on heterogeneous clusters (e.g., machines with different endian representations). Heterogeneous support is disabled by default because it imposes a minor performance penalty.Danger
The heterogeneous functionality is currently broken — do not use.
--with-wrapper-cflags=CFLAGS
--with-wrapper-cxxflags=CXXFLAGS
--with-wrapper-fcflags=FCFLAGS
--with-wrapper-ldflags=LDFLAGS
--with-wrapper-libs=LIBS
: Add the specified flags to the default flags that are used in Open MPI’s “wrapper” compilers (e.g.,mpicc
— see below for more information about Open MPI’s wrapper compilers). By default, Open MPI’s wrapper compilers use the same compilers used to build Open MPI and specify a minimum set of additional flags that are necessary to compile/link MPI applications. These configure options give system administrators the ability to embed additional flags in OMPI’s wrapper compilers (which is a local policy decision). The meanings of the different flags are:CFLAGS
: Flags passed by thempicc
wrapper to the C compilerCXXFLAGS
: Flags passed by thempic++
andmpiCC
wrappers to the C++ compilerFCFLAGS
: Flags passed by thempifort
wrapper to the Fortran compilerLDFLAGS
: Flags passed by all the wrappers to the linkerLIBS
: Flags passed by all the wrappers to the linker
See the section on customizing wrapper compiler behavior to see how to alter the wrapper compiler behavior at run time.