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<H2><A NAME="SECTION00053000000000000000">
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Configuration options</A>
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</H2>
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<P>
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To build MLD2P4 the first step is to use the <code>configure</code> script
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in the main directory to generate the necessary makefile(s).
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<P>
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As a minimal example consider the following:
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<PRE>
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./configure --with-psblas=PSB-INSTALL-DIR
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</PRE>
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which assumes that the various MPI compilers and support libraries are
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available in the standard directories on the system, and specifies
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only the PSBLAS install directory (note that the latter directory must
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be specified with an <EM>absolute</EM> path).
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The full set of options may be looked at by issuing the command
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<code>./configure --help</code>, which produces:
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<PRE>
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`configure' configures MLD2P4 2.0 to adapt to many kinds of systems.
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Usage: ./configure [OPTION]... [VAR=VALUE]...
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To assign environment variables (e.g., CC, CFLAGS...), specify them as
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VAR=VALUE. See below for descriptions of some of the useful variables.
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Defaults for the options are specified in brackets.
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Configuration:
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-h, --help display this help and exit
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--help=short display options specific to this package
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--help=recursive display the short help of all the included packages
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-V, --version display version information and exit
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-q, --quiet, --silent do not print `checking...' messages
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--cache-file=FILE cache test results in FILE [disabled]
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-C, --config-cache alias for `--cache-file=config.cache'
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-n, --no-create do not create output files
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--srcdir=DIR find the sources in DIR [configure dir or `..']
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Installation directories:
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--prefix=PREFIX install architecture-independent files in PREFIX
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[/usr/local]
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--exec-prefix=EPREFIX install architecture-dependent files in EPREFIX
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[PREFIX]
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By default, `make install' will install all the files in
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`/usr/local/bin', `/usr/local/lib' etc. You can specify
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an installation prefix other than `/usr/local' using `--prefix',
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for instance `--prefix=$HOME'.
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For better control, use the options below.
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Fine tuning of the installation directories:
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--bindir=DIR user executables [EPREFIX/bin]
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--sbindir=DIR system admin executables [EPREFIX/sbin]
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--libexecdir=DIR program executables [EPREFIX/libexec]
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--sysconfdir=DIR read-only single-machine data [PREFIX/etc]
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--sharedstatedir=DIR modifiable architecture-independent data [PREFIX/com]
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--localstatedir=DIR modifiable single-machine data [PREFIX/var]
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--libdir=DIR object code libraries [EPREFIX/lib]
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--includedir=DIR C header files [PREFIX/include]
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--oldincludedir=DIR C header files for non-gcc [/usr/include]
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--datarootdir=DIR read-only arch.-independent data root [PREFIX/share]
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--datadir=DIR read-only architecture-independent data [DATAROOTDIR]
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--infodir=DIR info documentation [DATAROOTDIR/info]
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--localedir=DIR locale-dependent data [DATAROOTDIR/locale]
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--mandir=DIR man documentation [DATAROOTDIR/man]
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--docdir=DIR documentation root [DATAROOTDIR/doc/mld2p4]
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--htmldir=DIR html documentation [DOCDIR]
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--dvidir=DIR dvi documentation [DOCDIR]
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--pdfdir=DIR pdf documentation [DOCDIR]
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--psdir=DIR ps documentation [DOCDIR]
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Optional Features:
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--disable-option-checking ignore unrecognized --enable/--with options
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--disable-FEATURE do not include FEATURE (same as --enable-FEATURE=no)
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--enable-FEATURE[=ARG] include FEATURE [ARG=yes]
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--enable-serial Specify whether to enable a fake mpi library to run
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in serial mode.
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Optional Packages:
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--with-PACKAGE[=ARG] use PACKAGE [ARG=yes]
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--without-PACKAGE do not use PACKAGE (same as --with-PACKAGE=no)
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--with-psblas=DIR The install directory for PSBLAS, for example,
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--with-psblas=/opt/packages/psblas-3.3
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--with-psblas-incdir=DIR
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Specify the directory for PSBLAS includes.
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--with-psblas-libdir=DIR
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Specify the directory for PSBLAS library.
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--with-extra-libs List additional link flags here. For example,
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--with-extra-libs=-lspecial_system_lib or
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--with-extra-libs=-L/path/to/libs
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--with-mumps=LIBNAME Specify the libname for MUMPS. Default: "-lsmumps
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-ldmumps -lcmumps -lzmumps -lmumps_common -lpord"
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--with-mumpsdir=DIR Specify the directory for MUMPS library and
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includes. Note: you will need to add auxiliary
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libraries with --extra-libs; this depends on how
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MUMPS was configured and installed, at a minimum you
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will need SCALAPACK and BLAS
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--with-mumpsincdir=DIR Specify the directory for MUMPS includes.
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--with-mumpslibdir=DIR Specify the directory for MUMPS library.
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--with-umfpack=LIBNAME Specify the library name for UMFPACK and its support
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libraries. Default: "-lumfpack -lamd"
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--with-umfpackdir=DIR Specify the directory for UMFPACK library and
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includes.
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--with-umfpackincdir=DIR
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Specify the directory for UMFPACK includes.
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--with-umfpacklibdir=DIR
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Specify the directory for UMFPACK library.
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--with-superlu=LIBNAME Specify the library name for SUPERLU library.
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Default: "-lsuperlu"
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--with-superludir=DIR Specify the directory for SUPERLU library and
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includes.
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--with-superluincdir=DIR
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Specify the directory for SUPERLU includes.
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--with-superlulibdir=DIR
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Specify the directory for SUPERLU library.
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--with-superludist=LIBNAME
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Specify the libname for SUPERLUDIST library.
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Requires you also specify SuperLU. Default:
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"-lsuperlu_dist"
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--with-superludistdir=DIR
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Specify the directory for SUPERLUDIST library and
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includes.
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--with-superludistincdir=DIR
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Specify the directory for SUPERLUDIST includes.
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--with-superludistlibdir=DIR
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Specify the directory for SUPERLUDIST library.
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Some influential environment variables:
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FC Fortran compiler command
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FCFLAGS Fortran compiler flags
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LDFLAGS linker flags, e.g. -L<lib dir> if you have libraries in a
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nonstandard directory <lib dir>
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LIBS libraries to pass to the linker, e.g. -l<library>
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CC C compiler command
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CFLAGS C compiler flags
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CPPFLAGS C/C++/Objective C preprocessor flags, e.g. -I<include dir> if
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you have headers in a nonstandard directory <include dir>
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CPP C preprocessor
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MPICC MPI C compiler command
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F77 Fortran 77 compiler command
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FFLAGS Fortran 77 compiler flags
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MPIF77 MPI Fortran 77 compiler command
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MPIFC MPI Fortran compiler command
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Use these variables to override the choices made by `configure' or to help
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it to find libraries and programs with nonstandard names/locations.
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Report bugs to <bugreport@mld2p4.it>.
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</PRE>
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For instance, if a user has built and installed PSBLAS 3.4 under the
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<code>/opt</code> directory and is
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using the SuiteSparse package (which includes UMFPACK), then MLD2P4
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might be configured with:
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<PRE>
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./configure --with-psblas=/opt/psblas-3.4/ \
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--with-umfpackincdir=/usr/include/suitesparse
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</PRE>
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Once the configure script has completed execution, it will have
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generated the file <code>Make.inc</code> which will then be used by all
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Makefiles in the directory tree; this file will be copied in the
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install directory under the name <code>Make.inc.MLD2P4</code>.
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<P>
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To use the MUMPS solver package,
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the user has to add the appropriate options to the configure script;
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by default we are looking for the libraries
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<code>-ldmumps -lsmumps -lzmumps -lzmumps -mumps_common -lpord</code>.
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MUMPS often uses additional packages such as ScaLAPACK, ParMETIS,
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SCOTCH, as well as enabling OpenMP; in such cases it is necessary to
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add linker options with the <code>--with-extra-libs</code> configure option.
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<P>
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To build the library the user will now enter
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<PRE>
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make
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</PRE>
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followed (optionally) by
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<PRE>
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make install
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</PRE><HR>
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