/*! \page page_build Build Instructions and Information

\section dependencies Dependencies

The list of GNU Radio dependencies and the minimum required versions,
if any, to build the various GNU Radio components.

Most of these components do not need to be individually compiled or
installed. Instead, rely on your operating system's package manager or
binary installation process (the <b>apt-get</b> system in Debian and
Ubuntu, <b>yum</b> in RedHat and Fedora, etc.). GNU Radio tries to keep an
up-to-date build guide for the majority of the supported operating
systems on gnuradio.org
(http://gnuradio.org/redmine/projects/gnuradio/wiki/BuildGuide).

Not all dependencies are required for all components, and not all
components are required for a given installation. The list of required
components is determined by what the user requires from GNU Radio. If,
for example, you do not use any Comedi-based hardware, do not worry
about building gr-comedi.

\subsection dep_global Global Dependencies
\li git                      http://code.google.com/p/msysgit
\li cmake                    http://www.cmake.org/cmake/resources/software.html
\li boost       (>= 1.35)    http://www.boostpro.com/download
\li cppunit     (>= 1.9.14)  http://gaiacrtn.free.fr/cppunit/index.html
\li fftw3f      (>= 3.0)     http://www.fftw.org/install/windows.html
\li gsl	        (>= 1.10)    http://gnuwin32.sourceforge.net/packages/gsl.htm

\subsection dep_python Python Wrappers
\li python      (>= 2.5)     http://www.python.org/download/
\li swig        (>= 1.3.31)  http://www.swig.org/download.html
\li numpy       (>= 1.1.0)   http://sourceforge.net/projects/numpy/files/NumPy/

\subsection dep_docs docs: Building the documentation
\li doxygen     (>= 1.5)     http://www.stack.nl/~dimitri/doxygen/download.html

\subsection dep_grc grc: The GNU Radio Companion
\li Cheetah     (>= 2.0)     http://www.cheetahtemplate.org/
\li pygtk       (>= 2.10)    http://www.pygtk.org/downloads.html

\subsection dep_gr_qtgui gr-qtgui: The QT-based Graphical User Interface
\li qt	        (>= 4.4)     http://qt.nokia.com/downloads/
\li qwt         (>= 5.2)     http://sourceforge.net/projects/qwt/
\li pyqt        (>= 4.4)     http://www.riverbankcomputing.co.uk/software/pyqt/download
\li pyqwt       (>= 5.2)     http://pyqwt.sourceforge.net/download.html

\subsection dep_gr_wxgui gr-wxgui: The WX-based Graphical User Interface
\li wxpython    (>= 2.8)     http://www.wxpython.org/
\li python-lxml (>= 1.3.6)   http://lxml.de/

\subsection dep_gr_audio gr-audio: Audio Subsystems (system/OS dependent)
\li audio-alsa  (>= 0.9)     http://www.alsa-project.org
\li audio-jack  (>= 0.8)     http://jackaudio.org/
\li portaduio   (>= 19)      http://www.portaudio.com/
\li audio-oss   (>= 1.0)     http://www.opensound.com/oss.html
\li audio-osx
\li audio-windows

\subsection dep_uhd uhd: The Ettus USRP Hardware Driver Interface
\li uhd         (>= 3.0.0)   http://code.ettus.com/redmine/ettus/projects/uhd/wiki

\subsection dep_shd shd: The Symplex Hardware Driver Interface
\li shd         (>= 3.0.0)   

\subsection dep_gr_video_sdl gr-video-sdl: PAL and NTSC display
\li SDL	        (>= 1.2.0)   http://www.libsdl.org/download-1.2.php

\subsection dep_gr_comedi gr-comedi: Comedi hardware interface
\li comedilib   (>= 0.8)     http://www.comedi.org/



\section build_gr_cmake Building GNU Radio

GNU Radio is built using the Cmake build system
(http://www.cmake.org/). The standard build method is as follows:

\code
$ mkdir $(builddir)
$ cd $(builddir)
$ cmake [OPTIONS] $(srcdir)
$ make
$ make test
$ sudo make install
\endcode

The \$(builddir) is the directory in which the code is built. This
<b>cannot</b> be the same path as where the source code resides. Often,
\$(builddir) is \$(srcdir)/build.

Options can be used to specify where to find various library or
include file dependencies that are not automatically being found
(-DCMAKE_PREFIX_PATH) or set the prefix
(-DCMAKE_INSTALL_PREFIX=(dir)).

Components can also be enabled and disabled through the options. For a
component named *gr-comp*, the option to disable would look like:
-DENABLE_GR_COMP=off. The "off" could also be "false" or "no", and
cmake is not case sensitive about these options. Similarly, "true",
"on", or "yes" will turn this component on. All components are enabled
by default.


\subsection build_gr_cmake_e100 Building for the E100

To build GNU Radio on the Ettus Research E100 embedded platforms,
Cmake has to know that the processors uses the NEON extensions. Use
the

\code
cmake -DCMAKE_CXX_FLAGS:STRING="-mcpu=cortex-a8 -mfpu=neon -mfloat-abi=softfp -g" \
      -DCMAKE_C_FLAGS:STRING="-mcpu=cortex-a8 -mfpu=neon -mfloat-abi=softfp -g" \
       <gr_source_dir>
\endcode


\section build_old_autotools Building Using Old Autotools Method

As of version 3.5, we have moved to using Cmake as the default,
preferred build system. If for some reason, Cmake fails on your
system, GNU Radio still includes the old autotools build process as a
parallel build method. To build:

\code
$ cd $(srcdir)
$ ./bootstrap   // only if not building from a tarball
$ cd $(builddir)
$ $(srcdir)/configure [options]
$ make [-jN]
$ make check
$ sudo make install
\endcode

*/