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.. _Getting Started with ndn-cxx:
Getting started with ndn-cxx
============================
Supported platforms
-------------------
ndn-cxx uses continuous integration and has been tested on the following
platforms:
- Ubuntu 14.04 (64-bit and 32-bit)
- Ubuntu 16.04 (64-bit and 32-bit)
- OS X 10.8
- OS X 10.9
- OS X 10.10
- OS X 10.11
ndn-cxx is known to work on the following platforms, although they are not officially
supported:
- Fedora >= 20
- CentOS >= 6.2
- Gentoo Linux
- FreeBSD >= 10.0
- Raspbian >= 3.12
Prerequisites
-------------
Required:
~~~~~~~~~
- ``python`` >= 2.6
- ``libsqlite3``
- ``libcrypto++``
- ``pkg-config``
- Boost libraries >= 1.54
- OSX Security framework (on OSX platform only)
Following are the detailed steps for each platform to install the compiler, all necessary
development tools and libraries, and ndn-cxx prerequisites.
- OS X
Install Xcode. In Xcode Preferences > Downloads, install "Command
Line Tools".
If using MacPorts, dependencies can be installed using the following
commands::
sudo port install pkgconfig boost sqlite3 libcryptopp
.. note::
If a major OS X system upgrade is performed after installing dependencies with MacPorts,
remember to `reinstall all ports <https://trac.macports.org/wiki/Migration>`__.
- Ubuntu
In a terminal, enter::
sudo apt-get install build-essential libcrypto++-dev libsqlite3-dev libboost-all-dev
- Fedora
In a terminal, enter::
sudo yum install gcc-g++ git
sudo yum install sqlite-devel cryptopp-devel boost-devel
Optional:
~~~~~~~~~
To build tutorials, manpages, and API documentation the following
dependencies need to be installed:
- ``doxygen``
- ``graphviz``
- ``python-sphinx`` and sphinx extensions ``sphinxcontrib-doxylink``,
``sphinxcontrib-googleanalytics``
The following lists steps for common platforms to install these prerequisites:
- On OS X with MacPorts::
sudo port install doxygen graphviz py27-sphinx sphinx_select
sudo port select sphinx py27-sphinx
# Install sphinx extensions
sudo port install py27-pip
sudo port select pip pip27
sudo pip install sphinxcontrib-doxylink sphinxcontrib-googleanalytics
- On Ubuntu::
sudo apt-get install doxygen graphviz python-sphinx python-pip
sudo pip install sphinxcontrib-doxylink sphinxcontrib-googleanalytics
- On Fedora::
sudo yum install doxygen graphviz python-sphinx
sudo pip install sphinxcontrib-doxylink sphinxcontrib-googleanalytics
.. _build:
Build
-----
(These are instructions to build ndn-cxx. To do development of ndn-cxx
code and update the build system, see Development.)
To build in a terminal, change directory to the ndn-cxx root. Enter:
::
./waf configure
./waf
sudo ./waf install
By default, only the shared version of ndn-cxx library is built. To build the static library,
use ``--enable-static`` option for ``./waf configure`` command. For example::
./waf configure --enable-static
To disable build of the shared library and build only the static library, use additional
``--disable-shared`` option. Note that at least one version of the library needs to be
enabled.
::
./waf configure --enable-static --disable-shared
After the shared library is built and installed, some systems require additional actions.
- on Linux::
sudo ldconfig
- on FreeBSD::
sudo ldconfig -m
.. note::
When library is installed in a non-standard path (in general: not in ``/usr/lib`` or
``/usr/local/lib``; on some Linux distros including Fedora: not in ``/usr/lib``),
additional actions may be necessary.
The installation path should be added to ``/etc/ld.so.conf`` (or in
``/etc/ld.so.conf.d``) **before** running ``sudo ldconfig``. For example::
echo /usr/local/lib | sudo tee /etc/ld.so.conf.d/ndn-cxx.conf
Alternatively, ``LD_LIBRARY_PATH`` environment variable should be set to the location of
the library::
export LD_LIBRARY_PATH=/usr/local/lib
This builds and installs the following items:
- ``<LIBPATH>/libndn-cxx.a``: static NDN C++ library (if enabled)
- ``<LIBPATH>/libndn-cxx.so``, ``<LIBPATH>/libndn-cxx.so.<VERSION>`` (on Linux),
``<LIBPATH>/libndn-cxx.dylib``, ``<LIBPATH>/libndn-cxx.<VERSION>.dylib`` (on OS X):
shared NDN C++ library (if enabled)
- ``<LIBPATH>/pkgconfig/libndn-cxx.pc``: pkgconfig file storing all
neccessary flags to build against the library. For example, if
pkgconfig or pkgconf package is installed and ``PKG_CONFIG_PATH`` is
configured properly (or ``<LIBPATH>/pkgconfig`` is a default path),
``pkgconfig --libs --clflags libndn-cxx`` will return all necessary
compile and link flags for the library.
- ``<BINPATH>/ndncatchunks3``: a simplified equivalent to ndncatchunks2
in NDNx package
- ``<BINPATH>/ndnputchunks3``: a simplified equivalent to ndnputchunks2
in NDNx package
- ``<BINPATH>/ndnsec``: tool to manage NDN keys and certificates
- ``<BINPATH>/ndnsec-*``: convenience scripts for ``ndnsec`` tools
If configured with tests: ``./waf configure --with-tests``), the above
commands will also produce:
- ``build/unit-tests``: A unit test binary for the library
1.5GB available memory per CPU core is necessary for efficient compilation.
On a multi-core machine with less than 1.5GB available memory per CPU core,
limit the objects being compiled in parallel with ``./waf -jN`` where N is the amount
of available memory divided by 1.5GB (eg. ``./waf -j1`` for 1.5GB memory),
which could usually avoid memory thrashing and result in faster compilation.
Build with examples
-------------------
By default, examples in ``examples/`` are not build. To enable them, use
``--with-examples`` configure option:
::
./waf configure --with-examples
./waf
sudo ./waf install
:ref:`Additional step <build>`:
- on Linux::
sudo ldconfig
- on FreeBSD::
sudo ldconfig -m
To run examples:
::
# trivial producer app
./build/examples/producer
# trivial consumer app
./build/examples/consumer
# trivial consumer app with timers
./build/examples/consumer-with-timer
If you want to test out a sample application, just create a ``.cpp`` file in ``examples/``
folder and it will be compiled on the next run on ``./waf``. For example:
::
cp examples/consumer.cpp examples/my-new-consumer-app.cpp
./waf
sudo ./waf install
./build/examples/my-new-consumer-app
Debug symbols
~~~~~~~~~~~~~
The default compiler flags enable debug symbols to be included in binaries (i.e., ``-g``
flag for ``./waf configure`` and ``-g3`` for ``./waf configure --debug``). This
potentially allows more meaningful debugging information if your application crashes.
If it is undesirable, default flags can be easily overridden:
::
CXXFLAGS="-O2" ./waf configure --prefix=/usr --sysconfdir=/etc
./waf
sudo ./waf install
:ref:`Additional step <build>`:
- on Linux::
sudo ldconfig
- on FreeBSD::
sudo ldconfig -m
Documentation
-------------
ndn-cxx tutorials and API documentation can be built using the following
commands:
::
# Full set of documentation (tutorials + API) in build/docs
./waf docs
# Only tutorials in `build/docs`
./waf sphinx
# Only API docs in `build/docs/doxygen`
./waf doxgyen
Manpages are automatically created and installed during the normal build
process (e.g., during ``./waf`` and ``./waf install``), if
``python-sphinx`` module is detected during ``./waf configure`` stage.
By default, manpages are installed into ``${PREFIX}/share/man`` (where
default value for ``PREFIX`` is ``/usr/local``). This location can be
changed during ``./waf configure`` stage using ``--prefix``,
``--datarootdir``, or ``--mandir`` options.
For more details, refer to ``./waf --help``.
Development Build
-----------------
The following is the suggested configure commands for development build.
::
./waf configure --debug --with-tests
./waf
sudo ./waf install
:ref:`Additional step <build>`:
- on Linux::
sudo ldconfig
- on FreeBSD::
sudo ldconfig -m
In the development build all compiler optimizations are disabled by
default and all warnings are treated as error. The default behavior can
be overridden by setting ``CXXFLAGS`` environment variable before
running ``./waf configure``:
::
CXXFLAGS="-O1 -g3" ./waf configure --debug --with-tests
...
Customize Compiler
------------------
To customize compiler, set ``CXX`` environment variable to point to compiler binary and, in
some case, specify type of the compiler using ``--check-cxx-compiler``. For example, when
using clang compiler on Linux system, use the following:
::
CXX=clang++ ./waf configure --check-cxx-compiler=clang++