Add manual installation instructions

README.md

@@ -4,4 +4,41 @@ This is the C++ library component of the [QML.jl](https://github.com/barche/QML.
 
 To compile this, make sure that Qt, libcxxwrap-julia and Julia can be found by adding the relevant paths to `CMAKE_PREFIX_PATH`.
 
-See the [QML.jl](https://github.com/barche/QML.jl) README for more info.
+Example sequence of commands to download the code and build it:
+
+```bash
+git clone https://github.com/barche/jlqml.git
+mkdir jlqml-build
+cd jlqml-build
+cmake -DCMAKE_BUILD_TYPE=Release -DCMAKE_PREFIX_PATH=/path/to/cxxwrap ../jlqml
+make
+```
+
+The path for CxxWrap can be obtained by running the following in Julia:
+
+```julia
+using CxxWrap
+dirname(dirname(CxxWrap.libcxxwrap_julia))
+```
+
+After building jlqml, add QML.jl in Julia with the environment variable `JLQML_DIR` set to the full build dir path:
+
+```julia
+ENV["JLQML_DIR"] = "/path/to/jlqml-build"
+```
+
+Then, in pkg mode (hit `]`):
+
+```
+add QML#master
+```
+
+See the [QML.jl](https://github.com/barche/QML.jl) README for more info on using the QML.jl package.
+
+## Qt compilation
+
+Using Qt packages from the Linux distribution is easiest, but if you need to compile Qt itself from source, the following configuration command should result in a Qt build that is compatible with QML.jl:
+
+```bash
+./configure -prefix /home/bjanssens/src/build/qt/qt-install -opensource -confirm-license -skip qtactiveqt -skip qtandroidextras -skip qtcanvas3d -skip qtconnectivity -skip qtdatavis3d -skip qtdoc -skip qtgamepad -skip qtnetworkauth -skip qtpurchasing -skip qtremoteobjects -skip qtscript -skip qtscxml -skip qtsensors -skip qtserialbus -skip qtserialport -skip qtspeech -skip qtvirtualkeyboard -skip qtwayland -skip qtwebchannel -skip qtwebengine -skip qtwebglplugin -skip qtwebsockets -skip qtwebview -skip qtwinextras -release
+```