E.2 Running Configure and Make

• Run the shell script configure. This will determine the features your system has (or doesn’t have) and create a file named Makefile from each of the files named Makefile.in.

  Here is a summary of the configure options that are most frequently used when building Octave:

  --help

  Print a summary of the options recognized by the configure script.

  --prefix=prefix

  Install Octave in subdirectories below prefix. The default value of prefix is /usr/local.

  --srcdir=dir

  Look for Octave sources in the directory dir.

  --disable-64

  Disable using 64-bit integers for indexing arrays and use 32-bit integers instead. On systems with 32-bit pointers, this option is always disabled. If the configure script determines that your BLAS library uses 32-bit integers, then operations using the following libraries are limited to arrays with dimensions that are smaller than 2^{31} elements:

  • BLAS
  • LAPACK
  • QRUPDATE
  • SuiteSparse
  • ARPACK

  Additionally, the following libraries use int internally, so maximum problem sizes are always limited:

  • GLPK
  • Qhull

  See Compiling Octave with 64-bit Indexing, for more details about building Octave with more complete support for large arrays.

  --enable-address-sanitizer-flags

  Enable compiler options -fsanitize=address and -fomit-frame-pointer for memory access checking. This option is primarily used for debugging Octave. Building Octave with this option has a negative impact on performance and is not recommended for general use. It may also interfere with proper functioning of the GUI.

  --disable-docs

  Disable building all forms of the documentation (Info, PDF, HTML). The default is to build documentation, but your system will need functioning Texinfo and TeX installs for this to succeed.

  --enable-float-truncate

  This option allows for truncation of intermediate floating point results in calculations. It is only necessary for certain platforms.

  --enable-readline

  Use the readline library to provide for editing of the command line in terminal environments. This option is on by default.

  --enable-shared

  Create shared libraries (this is the default). If you are planning to use the dynamic loading features, you will probably want to use this option. It will make your .oct files much smaller and on some systems it may be necessary to build shared libraries in order to use dynamically linked functions.

  You may also want to build a shared version of libstdc++, if your system doesn’t already have one.

  --with-blas=<lib>

  By default, configure looks for the best BLAS matrix libraries on your system, including optimized implementations such as the free ATLAS 3.0, as well as vendor-tuned libraries. (The use of an optimized BLAS will generally result in several-times faster matrix operations.) Use this option to specify a particular BLAS library that Octave should use.

  --with-lapack=<lib>

  By default, configure looks for the best LAPACK matrix libraries on your system, including optimized implementations such as the free ATLAS 3.0, as well as vendor-tuned libraries. (The use of an optimized LAPACK will generally result in several-times faster matrix operations.) Use this option to specify a particular LAPACK library that Octave should use.

  --with-magick=<lib>

  Select the library to use for image I/O. The two possible values are "GraphicsMagick" (default) or "ImageMagick".

  --with-sepchar=<char>

  Use <char> as the path separation character. This option can help when running Octave on non-Unix systems.

  --without-amd

  Don’t use AMD, disable some sparse matrix functionality.

  --without-camd

  Don’t use CAMD, disable some sparse matrix functionality.

  --without-colamd

  Don’t use COLAMD, disable some sparse matrix functionality.

  --without-ccolamd

  Don’t use CCOLAMD, disable some sparse matrix functionality.

  --without-cholmod

  Don’t use CHOLMOD, disable some sparse matrix functionality.

  --without-curl

  Don’t use the cURL library, disable the ftp objects, urlread and urlwrite functions.

  --without-cxsparse

  Don’t use CXSPARSE, disable some sparse matrix functionality.

  --without-fftw3

  Use the included FFTPACK library for computing Fast Fourier Transforms instead of the FFTW3 library.

  --without-fftw3f

  Use the included FFTPACK library for computing Fast Fourier Transforms instead of the FFTW3 library when operating on single precision (float) values.

  --without-glpk

  Don’t use the GLPK library for linear programming.

  --without-hdf5

  Don’t use the HDF5 library, disable reading and writing of HDF5 files.

  --without-opengl

  Don’t use OpenGL, disable native graphics toolkit for plotting. You will need gnuplot installed in order to make plots.

  --without-qhull

  Don’t use Qhull, disable delaunay, convhull, and related functions.

  --without-qrupdate

  Don’t use QRUPDATE, disable QR and Cholesky update functions.

  --without-umfpack

  Don’t use UMFPACK, disable some sparse matrix functionality.

  --without-zlib

  Don’t use the zlib library, disable data file compression and support for recent MAT file formats.

  --without-framework-carbon

  Don’t use framework Carbon headers, libraries, or specific source code even if the configure test succeeds (the default is to use Carbon framework if available). This is a platform specific configure option for Mac systems.

  --without-framework-opengl

  Don’t use framework OpenGL headers, libraries, or specific source code even if the configure test succeeds. If this option is given then OpenGL headers and libraries in standard system locations are tested (the default value is --with-framework-opengl). This is a platform specific configure option for Mac systems.

  See the file INSTALL for more general information about the command line options used by configure. That file also contains instructions for compiling in a directory other than the one where the source is located.

• Run make.

  You will need a recent version of GNU Make as Octave relies on certain features not generally available in all versions of make. Modifying Octave’s makefiles to work with other make programs is probably not worth your time; instead, we simply recommend installing GNU Make.

  There are currently three options for plotting in Octave: the external program gnuplot, the internal graphics engine using OpenGL coupled with either FLTK or Qt widgets. Gnuplot is a command-driven interactive function plotting program.

  To compile Octave, you will need a recent version of g++ or other ANSI C++ compiler. In addition, you will need a Fortran 77 compiler or f2c. If you use f2c, you will need a script like fort77 that works like a normal Fortran compiler by combining f2c with your C compiler in a single script.

  If you plan to modify the parser you will also need GNU bison and flex. If you modify the documentation, you will need GNU Texinfo.

  GNU Make, gcc (and libstdc++), gnuplot, bison, flex, and Texinfo are all available from many anonymous ftp archives. The primary site is ftp://ftp.gnu.org, but it is often very busy. A list of sites that mirror the software on ftp://ftp.gnu.org is available by anonymous ftp from ftp://ftp.gnu.org/pub/gnu/GNUinfo/FTP.

  Octave requires approximately 1.4 GB of disk storage to unpack and compile from source (significantly less, 400 MB, if you don’t compile with debugging symbols). To compile without debugging symbols try the command

  make CFLAGS=-O CXXFLAGS=-O LDFLAGS=

  instead of just make.

• If you encounter errors while compiling Octave, first see Installation Problems for a list of known problems and if there is a workaround or solution for your problem. If not, see Trouble for information about how to report bugs.
• Once you have successfully compiled Octave, run make install.

  This will install a copy of Octave, its libraries, and its documentation in the destination directory. As distributed, Octave is installed in the following directories. In the table below, prefix defaults to /usr/local, version stands for the current version number of the interpreter, and arch is the type of computer on which Octave is installed (for example, ‘i586-unknown-gnu’).

  prefix/bin

  Octave and other binaries that people will want to run directly.

  prefix/lib/octave-version

  Libraries like liboctave.a and liboctinterp.a.

  prefix/include/octave-version/octave

  Include files distributed with Octave.

  prefix/share

  Architecture-independent data files.

  prefix/share/man/man1

  Unix-style man pages describing Octave.

  prefix/share/info

  Info files describing Octave.

  prefix/share/octave/version/m

  Function files distributed with Octave. This includes the Octave version, so that multiple versions of Octave may be installed at the same time.

  prefix/libexec/octave/version/exec/arch

  Executables to be run by Octave rather than the user.

  prefix/lib/octave/version/oct/arch

  Object files that will be dynamically loaded.

  prefix/share/octave/version/imagelib

  Image files that are distributed with Octave.