## REQUIREMENTS to compile GRASS GIS 6

A workstation running some flavor of UNIX like Solaris, IRIX, Linux, BSD, Mac OS X or cygwin (on Win32). Ideally, you should have at least 500 Mb for data and 32 Mb RAM. The source code package needs around 50 MB uncompressed. The resulting binaries may need between 20 MB and 180 MB depending on your platform. During a full compilation you may need temporarily up to 550MB including the source code.

To disable features please read the INSTALL file.

### General requirements:

(most tools are standard tools on Linux, for other platforms you may have to install some of them.)

- C-compiler (cc, gcc, egcs, ...)
gcc: http://www.gnu.org/software/gcc/gcc.html
- GNU make is recommended
http://www.gnu.org/software/make/make.html
- zlib compression library (already installed on most modern systems)
It is used to internally compress GRASS raster files:
libz: http://www.gzip.org/zlib
- flex lexical analyzer generator (flex),
(lex is no longer supported, please use flex instead)
flex: http://www.gnu.org/software/flex/flex.html
- parser generator (yacc, bison)
bison: http://www.gnu.org/software/bison/bison.html
- libncurses4.x/5.x (already installed on modern systems)
http://www.gnu.org/software/ncurses/ncurses.html
ftp://ftp.gnu.org/pub/gnu/ncurses
- X11 window system for graphical output, development libraries (X development libraries, in some linux distributions they are separate packages, e.g. xlibs-dev)
http://www.xfree.org
- winGRASS: As alternative a generic MS-Windows driver is under construction which does not require X11
- PROJ4 - Projection Library
  http://www.remotesensing.org/proj

### Optional requirements:

- Tcl/Tk 8.x libraries (including the 'wish' program) to use the GRASS GUI menu system and the NVIZ visualization suite
  On some platforms (e.g. Debain/Sarge) GRASS needs to be compiled against the Tcl/Tk 8.3 development packages in order to get NVIZ working correctly.
  see http://tcl.sourceforge.net
- GDAL and OGR for import and export of most external raster and vector map formats
  http://www.gdal.org
- If hardware openGL support is missing in the X Server, Mesa-3.x (openGL clone) may be required for NVIZ
  http://mesa3d.sourceforge.net
- C++ Compiler (required for the r.terraflow module)
  gcc: http://www.gnu.org/software/gcc/gcc.html
- FFTW 2.x (library for computing the Discrete Fourier Transform), required for i.fft and i.ifft modules
  http://www.fftw.org
- libpng (for r.out.png and the PNG driver), usually already installed.
  http://www.libpng.org/pub/png/libpng.html
- libjpeg (for r.out.tiff), usually already installed.
  http://www.ijg.org
  ftp://ftp.uu.net/graphics/jpeg
- libtiff (for r.out.tiff), usually already installed.
  http://www.libtiff.org
- PostgreSQL libraries (for the PostgreSQL database interface)
  http://www.postgresql.org
- mySQL libraries (for the mySQL database interface)
  http://www.mysql.org
- unixODBC (for the ODBC database interface)
  http://www.unixodbc.org
- Motif or Lesstif libraries (for the "xanim" module)
  http://www.lesstif.org
- R language (for the R statistical language interface)
  http://cran.r-project.org
- FreeType2 (for TrueType font support and d.text.freetype)
  http://www.freetype.org

### Note:

SUN Solaris users may go here to download precompiled libraries etc.:
http://www.sunfreeware.com

SGI IRIX users may go here to download precompiled libraries etc.:
http://freeware.sgi.com

MacOSX users may go here to download precompiled libraries etc.:
http://fink.sourceforge.net

© GRASS Development Team 2001-2005

Please report bugs here:
http://grass.itc.it/bugtracking/bugreport.html

$Id: REQUIREMENTS.html,v 1.6 2005/02/22 01:26:16 hamish Exp $