Linphone is an open source softphone for voice and video over IP calling and instant messaging.

It is fully SIP-based, for all calling, presence and IM features.

General description is available from Linphone web site

Copyright © Belledonne Communications

Linphone is dual licensed, and is available either :

• under a GNU/GPLv3 license, for free (open source). Please make sure that you understand and agree with the terms of this license before using it (see LICENSE file for details).

• under a proprietary license, for a fee, to be used in closed source applications. Contact Belledonne Communications for any question about costs and services.

• Supported features and RFCs

• Linphone public wiki

Here are the general instructions to build Linphone for desktop. The specific instructions for each build platform is described just below. You will need the tools :

• cmake >= 3.15 : download it in https://cmake.org/download/
• python : https://www.python.org/downloads/release/python-381/
• pip : it is already embedded inside Python, so there should be nothing to do about it
• yasm : https://yasm.tortall.net/Download.html
• nasm : https://www.nasm.us/pub/nasm/releasebuilds/
• doxygen (required for the Cxx Wrapper)
• Perl
• Pystache : use 'pip install pystache --user'
• six : use 'pip install six --user'
• git

For Desktop : you will need Qt5 (5.12 or newer). C++11 support is required!

1. It's necessary to install the pip command and to execute:

    pip install pystache six
   

2. You have to set the environment variable Qt5_DIR to point to the path containing the cmake folders of Qt5, and the PATH to the Qt5 bin. Example:

    Qt5_DIR="~/Qt/5.12.5/gcc_64/lib/cmake"
    PATH="~/Qt/5.12.5/gcc_64/bin/:$PATH"
   

Note: If you have the third party tool qtchooser installed : eval "$(qtchooser -print-env)" export Qt5_DIR=${QTLIBDIR}/cmake/Qt5 export PATH=${QTTOOLDIR}:$PATH 3. For specific requirements, see platform instructions sections below.

    `git clone https://gitlab.linphone.org/BC/public/linphone-desktop.git --recursive`
    `cd linphone-desktop`
    `mkdir build`
    `cd build`
    `cmake .. -DCMAKE_BUILD_PARALLEL_LEVEL=10 -DCMAKE_BUILD_TYPE=RelWithDebInfo`
    `cmake --build . --target install --parallel 10 --config RelWithDebInfo`
    `./OUTPUT/bin/linphone --verbose` or `./OUTPUT/Linphone.app/Contents/MacOS/linphone --verbose`

    git clone https://gitlab.linphone.org/BC/public/linphone-desktop.git --recursive        

The build is done by building the SDK and the application. Their targets are sdk and linphone-qt.

1. Create your build folder at the root of the project : mkdir build Go to this new folder and begin the build process : cd build

2. Prepare your options : cmake ... By default, it will try compile all needed dependencies. You can remove some by adding -DENABLE_<COMPONENT>=NO to the command. You can use cmake-gui .. if you want to have a better access to them. You can add -DCMAKE_BUILD_PARALLEL_LEVEL=<count> to do <count> parallel builds for speeding up the process. Also, you can add -DENABLE_BUILD_VERBOSE=ON to get more feedback while generating the project.

Note : For Makefile or Ninja, you have to add -DCMAKE_BUILD_TYPE=<your_config> if you wish to build in a specific configuration (for example RelWithDebInfo).

3. Build and install the whole project : cmake --build . --target <target> --parallel <count> (replace <target> with the target name and <count> by the number of parallel builds).

Note : For XCode or Visual Studio, you have to add --config <your_config> if you wish to build in a specific configuration (for example RelWithDebInfo).

When all are over, the files will be in the OUTPUT folder in the build directory. When rebuilding, you have to use cmake --build . --target install (or cmake --install .) to put the application in the correct configuration.

Binaries inside other folders (like linphone-app and linphone-sdk) are not supposed to work.

4. When doing some modifications in the SDK, you can rebuild only the SDK with the target sdk and the same for the application with linphone-qt-only

5. In order to get packages, you can use cmake .. -DENABLE_APP_PACKAGING=YES. The files will be in OUTPUT/packages folder.

1. Update your project with :

    git fetch
    git pull --rebase
   

2. Update sub-modules from your current branch

    git submodule update --init --recursive
   

Then simply re-build using cmake.

• The latest version of Doxygen may not work with the SDK. If you some build issues and have a specific version of Doxygen that is not in your PATH, you can use -DLINPHONESDK_DOXYGEN_PROGRAM.

Eg on Mac : -DLINPHONESDK_DOXYGEN_PROGRAM=/Applications/Doxygen.app/Contents/Resources/doxygen

• If the build of the SDK crash with something like "cmd.exe failed" and no more info, it can be a dependency that is not available. You have to check if all are in your PATH. Usually, if it is about VPX or Decaf, this could come from your Perl installation.

• If the application doesn't start and create an empty file with a random name, it could be come from a bad configuration between your application and others sub-modules. Check your configurations and force them with -DCMAKE_BUILD_TYPE=<your_config> or --config <your_config>.

• On Mac, the application can crash at the start from QOpenGLContext. A workaround is to deactivate the mipmap mode on images by adding into your configuration file (linphonerc): mipmap_enabled=0 in [ui] section.

To install the required dependencies on Mac OS X, you can use Homebrew. Before you install packages with Brew, you may have to change directories permissions (if you can't change permissions with sudo on a MacOS >= High Sierra, get a look at this StackOverflow answer).

1. Install XCode from the Apple store. Run it at least once to allow it to install its tools.

2. Install Homebrew by following the instructions here https://brew.sh/

3. Install dependencies:

    brew install cmake qt git
   

4. First ensure you have installed pip. You can get it for python 2.7 there.

5. Then, you can install a pip package with the following command:

    pip install [package]
   

For instance, if you don't have pystache and the dot package (contained in graphviz), enter the following commands:

    pip install pystache
    pip install graphviz

6. Build as usual (General Steps).

64-bit version is not fully supported at this moment by Linphone Desktop and wasn't tested. If a build for 64bits is needed, replace all mingw32 by mingw64, i686 by x86_64, -A Win32 by -A x64 or simply remove it.

1. Install main tools:

• MinGW/MSYS2 : download
  • Follow instructions on their "Getting Started" page.
  • Install toolchains and prepare python:
    • pacman -Sy --needed base-devel mingw-w64-i686-toolchain
    • pacman -S python3-pip in MSYS2 MSYS console
    • python3 -m pip install pystache six in cmd
  • In this order, add C:\msys64\, C:\msys64\usr\bin and C:\msys64\mingw32\bin in your PATH (the last one is needed by cmake to know where gcc is) to the PATH environement variable from windows advanced settings.

When building the SDK, it will install automatically from MSYS2 : perl, yasm, gawk, bzip2, nasm, sed, patch, pkg-config, gettext, glib2andintltool` (if needed)

• git : use MSYS2 : pacman -S git or download

• Visual Studio must also be properly configured with addons. Under "Tools"->"Obtain tools and features", make sure that the following components are installed:

  • Tasks: Select Windows Universal Platform development, Desktop C++ Development, .NET Development
  • Under "Installation details". Go to "Desktop C++ Development" and add "SDK Windows 8.1 and SDK UCRT"
  • Individual component: Windows 8.1 SDK

2. Ensure that you have downloaded the Qt msvc2015 version or Qt msvc2017 version (32-bit).

3. Or open a Command line with Visual Studio Developer Command Prompt for VS 2017 and call qtenv2.bat that is in your qt binaries eg: C:\Qt\<version>\msvc2017\bin\qtenv2.bat

4. Build as usual with adding -A Win32 to cmake .. (General Steps) :

• cmake .. -DCMAKE_BUILD_PARALLEL_LEVEL=10 -DCMAKE_BUILD_TYPE=RelWithDebInfo -A Win32 The default build is very long. It is prefered to use the Ninja generator -G "Ninja"
• cmake --build . --target ALL_BUILD --parallel 10 --config RelWithDebInfo

5. The project folder will be in the build directory and binaries should be in the OUTPUT folder.

There are docker files configurations where dependencies can be retrieved.

Also, more configurations are available in the docker-files folder of linphone-sdk submodule.

In order to submit a patch for inclusion in Linphone's source code:

1. First make sure that your patch applies to the latest Git sources before submitting : patches made to old versions can't and won't be merged.

2. Fill out and send the contributor agreement for your patch to be included in the Git tree by following links there. The goal of this agreement is to grant us the peaceful exercise of our rights to the Linphone source code, without losing your rights over your contribution.

3. Then go to the github repository and make a Pull Requests based on your code.

Please note that we don't offer free support and these contributions will be addressed on our free-time.

Linphone is getting a full internationalization support. We no longer use transifex for the translation process, instead we have deployed our own instance of Weblate. If you want you can contribute at: https://weblate.linphone.org/projects/linphone-desktop/

Launch the application with --verbose parameter to get full logs and send it with your request. You can use the "Send logs" button in settings to upload log files and share it by email or with a post in the corresponding Github project :

• Desktop Application
• Linphone SDK

On some OS (like Fedora 22 and later), they disable Qt debug output by default. To get full output, you need to create ~/.config/QtProject/qtlogging.ini and add :

    [Rules]
    *.debug=true
    qt.*.debug=false