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# Libqmatrixclient
libqmatrixclient is a Qt-based library to make IM clients for the [Matrix](https://matrix.org) protocol. It is used by the Quaternion client and is a part of the Quaternion project. The below instructions are the same for Quaternion and libqmatrixclient (the source tree of Quaternion has most up-to-date instructions but this source tree strives to closely follow).
## Contacts
You can find authors of libqmatrixclient in the Quaternion Matrix room: [#quaternion:matrix.org](https://matrix.to/#/#quaternion:matrix.org).
Issues should be submitted to [the project's issue tracker](https://github.com/Fxrh/libqmatrixclient/issues). We do not guarantee a response but we usually try to at least acknowledge the issue
## Pre-requisites
a Linux, MacOS or Windows system (desktop versions tried; mobile Linux/Windows might work too)
- a Git client (to check out this repo)
- CMake (from your package management system or [the official website](https://cmake.org/download/))
- Qt 5 (either Open Source or Commercial), version 5.2.1 or higher as of this writing (check the CMakeLists.txt for most up-to-date information). Qt 5.3 or higher recommended on Windows.
- a C++ toolchain supported by your version of Qt (see a link for your platform at [the Qt's platform requirements page](http://doc.qt.io/qt-5/gettingstarted.html#platform-requirements))
- GCC 4.8, Clang 3.5.0, Visual C++ 2015 are the oldest officially supported as of this writing
## Installing pre-requisites
### Linux
Just install things from "Pre-requisites" using your preferred package manager. If your Qt package base is fine-grained you might want to take a look at CMakeLists.txt to figure out which specific libraries libqmatrixclient uses (or blindly run cmake and look at error messages).
### OS X
`brew install qt5` should get you Qt5. You may need to tell CMake about the path to Qt by passing `-DCMAKE_PREFIX_PATH=<where-Qt-installed>`
### Windows
1. Install a Git client and CMake. The commands here imply that git and cmake are in your PATH - otherwise you have to prepend them with your actual paths.
1. Install Qt5, using their official installer. If for some reason you need to use Qt 5.2.1, select its Add-ons component in the installer as well; for later versions, no extras are needed. If you don't have a toolchain and/or IDE, you can easily get one by selecting Qt Creator and at least one toolchain under Qt Creator.
1. Make sure CMake knows about Qt and the toolchain - the easiest way is to run a qtenv2.bat script that can be found in `C:\Qt\<Qt version>\<toolchain>\bin` (assuming you installed Qt to `C:\Qt`). The only thing it does is adding necessary paths to PATH - you might not want to run it on system startup but it's very handy to setup environment before building. Setting CMAKE_PREFIX_PATH, the same way as for OS X (see above), also helps.
There are no official MinGW-based 64-bit packages for Qt. If you're determined to build 64-bit libqmatrixclient, either use a Visual Studio toolchain or build Qt5 yourself as described in Qt documentation.
## Source code
To get all necessary sources, simply clone the GitHub repo. If you have cloned Quaternion or Tensor sources with `--recursive`, you already have libqmatrixclient in the respective `lib` subdirectory.
## Building
In the root directory of the project sources:
```
mkdir build_dir
cd build_dir
cmake .. # Pass -DCMAKE_PREFIX_PATH and -DCMAKE_INSTALL_PREFIX here if needed
cmake --build . --target all
```
This will get you the compiled library in `build_dir` inside your project sources. Only static builds of libqmatrixclient are tested at the moment; experiments with dynamic builds are welcome. The two known projects to link with libqmatrixclient are Tensor and Quaternion; you should take a look at their source code before doing anything with libqmatrixclient on your own.
## Troubleshooting
If `cmake` fails with...
```
CMake Warning at CMakeLists.txt:11 (find_package):
By not providing "FindQt5Widgets.cmake" in CMAKE_MODULE_PATH this project
has asked CMake to find a package configuration file provided by
"Qt5Widgets", but CMake did not find one.
```
...then you need to set the right -DCMAKE_PREFIX_PATH variable, see above.
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