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SvxLink build instructions

Dependencies

Some dependencies need to be installed before building. First, the build tools:

  • gcc/g+\+: The GNU C/C++ compiler (Required)

  • make: The Make build tool (Required)

  • cmake: Version 2.8 or later. A makefile generator (Required)

  • groff: Needed to build manual pages (Recommended)

  • gzip: Needed to compress manual pages (Recommended)

  • doxygen: Used to build developer documentation (Optional)

  • tar: Needed to unpack downloaded source archives (Recommended)

  • git: Needed to download bleeding edge/experimental source code (Optional)

SvxLink depend on some third party libraries. Since packages are named differently in different distributions you need to do some research to find out exactly what the packages are called in your distribution. Packages usually are devided in two parts, a runtime part and a development part. Both are needed to compile SvxLink. The development packages usually have a name ending in "-dev" or "-devel".

  • libsigc++: Version 2. A callback handling framework (Required)

  • libpopt: Parse command line options (Required)

  • tcl: The TCL scripting language (Required)

  • libgcrypt: Cryptographic functions (Required)

  • libasound: Alsa sound system support (Recommended)

  • libgsm: GSM audio codec (Required)

  • libjsoncpp: For json file support (Required)

  • libspeex: The Speex audio codec (Optional)

  • librtlsdr: Support for RTL2832U DVB-T/SDR USB dongles (Optional)

  • libgpiod: More modern approach for GPIO support (Optional)

  • libqt: Version 4. Framework for graphical applications (Optional)

  • libssl: OpenSSL Cryptography and SSL/TLS Toolkit

There also are some runtime dependencies which normally is needed to run a SvxLink system.

  • alsa-utils: Alsa tools for configuring sound levels etc (Recommended)

  • opus-tools: Encode/decode Opus sound files (Optional)

Required system user

Before trying to build and install using the commands below you also need to create a user called svxlink. There must also exist a group called daemon for the install to complete without errors.

How to create users and groups vary between different Linux distributions. A common command that exist on many distributions is useradd. The daemon group usually exist but if not, look for the groupadd command.

Build and install

SvxLink use the CMake build system. The basic pattern for building using CMake looks like this:

cd path/to/svxlink/src
mkdir build
cd build
cmake ..
make
make doc
sudo make install
sudo ldconfig

This will build SvxLink and install it under /usr/local. The first argument to cmake point out the source directory so the build directory can be created anywhere. A common pattern is to place the build directly under the top source code directory, hence the ".." in the example above.

To use another install location (e.g. /opt/svxlink) use the following line when running cmake:

cmake -DCMAKE_INSTALL_PREFIX=/opt/svxlink ..

The "-D" switch is used to define CMake variables. There are both standardized CMake variables and project specific ones.

To get install locations that would be used when building a binary package, use the following cmake line:

cmake -DCMAKE_INSTALL_PREFIX=/usr -DSYSCONF_INSTALL_DIR=/etc \
      -DLOCAL_STATE_DIR=/var ..

Cmake does normally only need to be run one time. After that the configuration is cached so only "make" need to be run. Make will rerun cmake when necessary.

Some other good to know configuration variables that also can be set using -D command line switch are:

USE_ALSA          -- Set to NO to compile without Alsa sound support
USE_OSS           -- Set to NO to compile without OSS sound support
USE_QT            -- Set to NO to compile without Qt (no Qtel)
BUILD_STATIC_LIBS -- Set to YES to build static libraries as well as dynamic
LIB_SUFFIX        -- Set to 64 on 64 bit systems to install in the lib64 dir

Further reading

More details can be found on the SvxLink web pages: