Configuration options

In order to build MLD2P4, the first step is to use the configure script in the main directory to generate the necessary makefile.

As a minimal example consider the following:

./configure --with-psblas=PSB-INSTALL-DIR

which assumes that the various MPI compilers and support libraries are available in the standard directories on the system, and specifies only the PSBLAS install directory (note that the latter directory must be specified with an absolute path). The full set of options may be looked at by issuing the command ./configure --help, which produces:

`configure' configures MLD2P4 2.1 to adapt to many kinds of systems.

Usage: ./configure [OPTION]... [VAR=VALUE]...

To assign environment variables (e.g., CC, CFLAGS...), specify them as
VAR=VALUE.  See below for descriptions of some of the useful variables.

Defaults for the options are specified in brackets.

Configuration:
  -h, --help              display this help and exit
      --help=short        display options specific to this package
      --help=recursive    display the short help of all the included packages
  -V, --version           display version information and exit
  -q, --quiet, --silent   do not print `checking...' messages
      --cache-file=FILE   cache test results in FILE [disabled]
  -C, --config-cache      alias for `--cache-file=config.cache'
  -n, --no-create         do not create output files
      --srcdir=DIR        find the sources in DIR [configure dir or `..']

Installation directories:
  --prefix=PREFIX         install architecture-independent files in PREFIX
                          [/usr/local]
  --exec-prefix=EPREFIX   install architecture-dependent files in EPREFIX
                          [PREFIX]

By default, `make install' will install all the files in
`/usr/local/bin', `/usr/local/lib' etc.  You can specify
an installation prefix other than `/usr/local' using `--prefix',
for instance `--prefix=$HOME'.

For better control, use the options below.

Fine tuning of the installation directories:
  --bindir=DIR            user executables [EPREFIX/bin]
  --sbindir=DIR           system admin executables [EPREFIX/sbin]
  --libexecdir=DIR        program executables [EPREFIX/libexec]
  --sysconfdir=DIR        read-only single-machine data [PREFIX/etc]
  --sharedstatedir=DIR    modifiable architecture-independent data [PREFIX/com]
  --localstatedir=DIR     modifiable single-machine data [PREFIX/var]
  --libdir=DIR            object code libraries [EPREFIX/lib]
  --includedir=DIR        C header files [PREFIX/include]
  --oldincludedir=DIR     C header files for non-gcc [/usr/include]
  --datarootdir=DIR       read-only arch.-independent data root [PREFIX/share]
  --datadir=DIR           read-only architecture-independent data [DATAROOTDIR]
  --infodir=DIR           info documentation [DATAROOTDIR/info]
  --localedir=DIR         locale-dependent data [DATAROOTDIR/locale]
  --mandir=DIR            man documentation [DATAROOTDIR/man]
  --docdir=DIR            documentation root [DATAROOTDIR/doc/mld2p4]
  --htmldir=DIR           html documentation [DOCDIR]
  --dvidir=DIR            dvi documentation [DOCDIR]
  --pdfdir=DIR            pdf documentation [DOCDIR]
  --psdir=DIR             ps documentation [DOCDIR]

Program names:
  --program-prefix=PREFIX            prepend PREFIX to installed program names
  --program-suffix=SUFFIX            append SUFFIX to installed program names
  --program-transform-name=PROGRAM   run sed PROGRAM on installed program names

Optional Features:
  --disable-option-checking  ignore unrecognized --enable/--with options
  --disable-FEATURE       do not include FEATURE (same as --enable-FEATURE=no)
  --enable-FEATURE[=ARG]  include FEATURE [ARG=yes]
  --disable-dependency-tracking  speeds up one-time build
  --enable-dependency-tracking   do not reject slow dependency extractors
  --enable-serial         Specify whether to enable a fake mpi library to run
                          in serial mode.
  --enable-long-integers  Specify usage of 64 bits integers.

Optional Packages:
  --with-PACKAGE[=ARG]    use PACKAGE [ARG=yes]
  --without-PACKAGE       do not use PACKAGE (same as --with-PACKAGE=no)
  --with-psblas=DIR       The install directory for PSBLAS, for example,
                          --with-psblas=/opt/packages/psblas-3.5
  --with-psblas-incdir=DIR
                          Specify the directory for PSBLAS includes.
  --with-psblas-libdir=DIR
                          Specify the directory for PSBLAS library.
  --with-ccopt            additional CCOPT flags to be added: will prepend
                          to CCOPT
  --with-fcopt            additional FCOPT flags to be added: will prepend
                          to FCOPT
  --with-libs             List additional link flags here. For example,
                          --with-libs=-lspecial_system_lib or
                          --with-libs=-L/path/to/libs
  --with-clibs            additional CLIBS flags to be added: will prepend
                          to CLIBS
  --with-flibs            additional FLIBS flags to be added: will prepend
                          to FLIBS
  --with-library-path     additional LIBRARYPATH flags to be added: will
                          prepend to LIBRARYPATH
  --with-include-path     additional INCLUDEPATH flags to be added: will
                          prepend to INCLUDEPATH
  --with-module-path      additional MODULE_PATH flags to be added: will
                          prepend to MODULE_PATH
  --with-extra-libs       List additional link flags here. For example,
                          --with-extra-libs=-lspecial_system_lib or
                          --with-extra-libs=-L/path/to/libs
  --with-blas=<lib>       use BLAS library <lib>
  --with-blasdir=<dir>    search for BLAS library in <dir>
  --with-lapack=<lib>     use LAPACK library <lib>
  --with-mumps=LIBNAME    Specify the libname for MUMPS. Default: autodetect
                          with minimum "-lmumps_common -lpord"
  --with-mumpsdir=DIR     Specify the directory for MUMPS library and
                          includes. Note: you will need to add auxiliary
                          libraries with --extra-libs; this depends on how
                          MUMPS was configured and installed, at a minimum you
                          will need SCALAPACK and BLAS
  --with-mumpsincdir=DIR  Specify the directory for MUMPS includes.
  --with-mumpslibdir=DIR  Specify the directory for MUMPS library.
  --with-umfpack=LIBNAME  Specify the library name for UMFPACK and its support
                          libraries. Default: "-lumfpack -lamd"
  --with-umfpackdir=DIR   Specify the directory for UMFPACK library and
                          includes.
  --with-umfpackincdir=DIR
                          Specify the directory for UMFPACK includes.
  --with-umfpacklibdir=DIR
                          Specify the directory for UMFPACK library.
  --with-superlu=LIBNAME  Specify the library name for SUPERLU library.
                          Default: "-lsuperlu"
  --with-superludir=DIR   Specify the directory for SUPERLU library and
                          includes.
  --with-superluincdir=DIR
                          Specify the directory for SUPERLU includes.
  --with-superlulibdir=DIR
                          Specify the directory for SUPERLU library.
  --with-superludist=LIBNAME
                          Specify the libname for SUPERLUDIST library.
                          Requires you also specify SuperLU. Default:
                          "-lsuperlu_dist"
  --with-superludistdir=DIR
                          Specify the directory for SUPERLUDIST library and
                          includes.
  --with-superludistincdir=DIR
                          Specify the directory for SUPERLUDIST includes.
  --with-superludistlibdir=DIR
                          Specify the directory for SUPERLUDIST library.

Some influential environment variables:
  FC          Fortran compiler command
  FCFLAGS     Fortran compiler flags
  LDFLAGS     linker flags, e.g. -L<lib dir> if you have libraries in a
              nonstandard directory <lib dir>
  LIBS        libraries to pass to the linker, e.g. -l<library>
  CC          C compiler command
  CFLAGS      C compiler flags
  CPPFLAGS    C/C++/Objective C preprocessor flags, e.g. -I<include dir> if
              you have headers in a nonstandard directory <include dir>
  MPICC       MPI C compiler command
  MPIFC       MPI Fortran compiler command
  CPP         C preprocessor

Use these variables to override the choices made by `configure' or to help
it to find libraries and programs with nonstandard names/locations.

Report bugs to <bugreport@mld2p4.it>.

For instance, if a user has built and installed PSBLAS 3.5 under the /opt directory and is using the SuiteSparse package (which includes UMFPACK), then MLD2P4 might be configured with:

 ./configure --with-psblas=/opt/psblas-3.5/ \
 --with-umfpackincdir=/usr/include/suitesparse/

Once the configure script has completed execution, it will have generated the file Make.inc which will then be used by all Makefiles in the directory tree; this file will be copied in the install directory under the name Make.inc.MLD2P4.

To use the MUMPS solver package, the user has to add the appropriate options to the configure script; by default we are looking for the libraries -ldmumps -lsmumps -lzmumps -mumps_common -lpord. MUMPS often uses additional packages such as ScaLAPACK, ParMETIS, SCOTCH, as well as enabling OpenMP; in such cases it is necessary to add linker options with the --with-extra-libs configure option.

To build the library the user will now enter

make

followed (optionally) by

make install

Many Linux distributions (e.g. Ubuntu, Fedora, CentOS) provide precompiled packages for the prerequisite softwares; in many cases the software packages are split between a runtime part and a ``developer'' part, to rebuild MLD2P4 you'll need both.