Building Qt

Ethereum(Go) Requires QML 5.1+

Mac OS X

brew tap homebrew/versions

brew install pkg-config qt5

Qt >=5.1 is needed. The following commands set the current Qt version and use it to set a go compiler flag:

export PKG_CONFIG_PATH=`brew --prefix qt5`/lib/pkgconfig
export QT5VERSION=`pkg-config --modversion Qt5Core`
export CGO_CPPFLAGS=-I`brew --prefix qt5`/include/QtCore/$QT5VERSION/QtCore

then go-ethereum build should work

go get -u github.com/go-qml/qml
go get -u github.com/ethereum/go-ethereum/ethereal

Linux

Ubuntu

sudo add-apt-repository ppa:ubuntu-sdk-team/ppa
sudo apt-get update
sudo apt-get install ubuntu-sdk qtbase5-private-dev qtdeclarative5-private-dev libqt5opengl5-dev

To install ubuntu-sdk, you may need to follow http://askubuntu.com/questions/408463/unmet-dependencies-i-cant-install-ubuntu-sdk

On Ubuntu 14.04, you will have to separately install the qtdialogs package

sudo apt-get install qtdeclarative5-dialogs-plugin

If you get an error which looks like:

FATAL: asset not found: you can set an alternative asset path on on the command line using option 'asset_path'
panic: file:///$GOPATH/src/github.com/ethereum/go-ethereum/ethereal/assets/qml/wallet.qml:5 module "QtQuick.Window" version 2.1 is not installed

Then you will need to have >= QT5.1 AND <= QT5.2.0 installed and your environmental variables set to something like this:

export PKG_CONFIG_PATH=<QT Location>/Qt5.2.0/5.2.0/gcc_64/lib/pkgconfig
export CGO_CPPFLAGS="-I<QT Location>/Qt5.2.0/5.2.0/gcc_64/include/QtCore/5.2.0/QtCore"
export LD_LIBRARY_PATH=<QT Location>/Qt5.2.0/5.2.0/gcc_64/lib

Remember to change to wherever you have QT installed. After setting your environmental variables, you will need to reinstall the go-qml package and the ethereal package:

go get -u github.com/go-qml/qml
go get -u github.com/ethereum/go-ethereum/ethereal

For 13.10, the qt packages in the ppas are not >= 5.1 at this time, so you must download and install QT from here. For 14.04, the qt packages in the ppas default to 5.2.1, which is not currently compatible with ethereal. QT 5.2.0 installer can be downloaded from here.

After you run the installer, then you can set the environment variables as described above and it should work as expected. To make sure that Ethereal runs in the proper environment if you are using it from a desktop file then one way to do this is to make a wrapper in your ~/.bin or other $PATH location which looks something like this:

#!/usr/bin/env bash
export PKG_CONFIG_PATH=<QT Location>/Qt5.2.0/5.2.0/gcc_64/lib/pkgconfig
export CGO_CPPFLAGS="-I<QT Location>/Qt5.2.0/5.2.0/gcc_64/include/QtCore/5.2.0/QtCore"
export LD_LIBRARY_PATH=<QT Location>/Qt5.2.0/5.2.0/gcc_64/lib  
<GO BIN FOLDER>/ethereal -asset_path=<GO FOLDER>/src/github.com/ethereum/go-ethereum/ethereal/assets