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====== How to compile and install Qt to an ARM platform ====== ===== Qt for Ubuntu ARM Core ===== //These instructions were tested on a Ubuntu 12.04 LTS system// ==== Prerequisites ==== First of all you need to install a cross-compiler tool that is compatible with Ubuntu Core ARM: <code> apt-get install gcc-arm-linux-gnueabihf g++-arm-linux-gnueabihf </code> Other tools like autogen, libtool and others are considered to be installed on a development host. Download qt sources from 'ftp://ftp.qt-project.org/qt/source/'. To avoid problems connected with the latest Qt 5.x version we'll use the latest from 4.x series: 4.8.1 <code> wget ftp://ftp.qt-project.org/qt/source/qt-everywhere-opensource-src-4.8.1.tar.gz </code> Untar it in the home directory: <code> tar xf qt-everywhere-opensource-src-4.8.1.tar.gz </code> Now we need to specify a proper configuration that is suitable for our target system. Let's presume that we want to work only with a touchscreen for input and omit Java, SQL and WebKit support. You can still enable these packets, it only affects the build time. First, let's specify the cross-environment configuration. For this modify the file 'mkspecs/qws/linux-arm-gnueabi-g++/qmake.conf' and make it as suggested: <code> # # qmake configuration for building with arm-linux-gnueabihf-g++ # include(../../common/linux.conf) include(../../common/gcc-base-unix.conf) include(../../common/g++-unix.conf) include(../../common/qws.conf) TSLIB_INCDIR = /usr/local/include TSLIB_LIBDIR = /usr/local/lib #Compiler Flags to take advantage of the ARM architecture QMAKE_CC = arm-linux-gnueabihf-gcc QMAKE_CXX = arm-linux-gnueabihf-g++ QMAKE_LINK = arm-linux-gnueabihf-g++ QMAKE_LINK_SHLIB = arm-linux-gnueabihf-g++ # modifications to linux.conf QMAKE_AR = arm-linux-gnueabihf-ar cqs QMAKE_OBJCOPY = arm-linux-gnueabihf-objcopy QMAKE_STRIP = arm-linux-gnueabihf-strip QMAKE_INCDIR += $$TSLIB_INCDIR QMAKE_LIBDIR += $$TSLIB_LIBDIR QMAKE_LIBS += -lts load(qt_config) </code> Please pay attention that we include the Include- and Library- paths to the build as TSLIB_INCDIR and TSLIB_LIBDIR. Next, run the configure script: <code> ./configure -prefix /opt/qte4.8.1 -embedded arm -platform qws/linux-x86-g++ -xplatform qws/linux-arm-gnueabi-g++ -depths 16,24,32 -no-mmx -no-3dnow -no-sse -no-sse2 -no-glib -no-cups -no-largefile -no-accessibility -no-openssl -no-gtkstyle -fast -qt-mouse-tslib -nomake demos -nomake examples -no-svg -no-phonon -no-qt3support -no-svg -qt-gfx-linuxfb -no-javascript-jit -confirm-license -opensource -no-webkit </code>