到 Qt 官網下載合適的 Qt 版本，地址：http://download.qt-project.org/archive/qt/
1.環境搭建:
1.安裝automake、libtool 和主機上的 Qt 工具：
$ sudo apt-get install automake autoconf libtool m4 $ sudo apt-get install libX11-dev libXext-dev libXtst-dev libXrender-dev $ sudo apt-get install libqt4-core libqt4-dev libqt4-webkit qt4-demos
2.搭建交叉編譯環境：
環境搭建很簡單,只要把交叉編譯工具鏈解壓后，在/etc/profile文件最后一行處添加環境變量，系統啟動時會自動設置。
解壓后進入目錄，ls bin/可以看到aarch64-linux-gnu-gcc、aarch64-linux-gnu-g++等編譯器。
[~/qtArm64Toolchain/Ambarella_Linaro_Toolchain_2016.02_For_S5/linaro-aarch64-2016.02-gcc5.3 root@jz4775dev] [root@jz4775dev]# ls aarch64-linux-gnu bin include lib lib64 libexec share [~/qtArm64Toolchain/Ambarella_Linaro_Toolchain_2016.02_For_S5/linaro-aarch64-2016.02-gcc5.3 root@jz4775dev] [root@jz4775dev]# ls bin/ aarch64-linux-gnu-addr2line aarch64-linux-gnu-cpp aarch64-linux-gnu-gcc-ar aarch64-linux-gnu-gdb aarch64-linux-gnu-objcopy aarch64-linux-gnu-readelf aarch64-linux-gnu-ar aarch64-linux-gnu-elfedit aarch64-linux-gnu-gcc-nm aarch64-linux-gnu-gprof aarch64-linux-gnu-objdump aarch64-linux-gnu-size aarch64-linux-gnu-as aarch64-linux-gnu-g++ aarch64-linux-gnu-gcc-ranlib aarch64-linux-gnu-ld aarch64-linux-gnu-pkg-config aarch64-linux-gnu-strings aarch64-linux-gnu-c++ aarch64-linux-gnu-gcc aarch64-linux-gnu-gcov aarch64-linux-gnu-ld.bfd aarch64-linux-gnu-pkg-config-real aarch64-linux-gnu-strip aarch64-linux-gnu-c++filt aarch64-linux-gnu-gcc-5.3.1 aarch64-linux-gnu-gcov-tool aarch64-linux-gnu-nm aarch64-linux-gnu-ranlib
[root@jz4775dev]# vim /etc/profile
在最后一行添加：
export PATH=/root/qtArm64Toolchain/Ambarella_Linaro_Toolchain_2016.02_For_S5/linaro-aarch64-2016.02-gcc5.3/bin:$PATH
2.編譯安裝Qt4.7.3
把qt-everywhere-opensource-src-4.7.3.tar.gz拷貝到/opt 目錄下，使用下面command解壓：
tar -xvf qt-everywhere-opensource-src-4.7.3.tar.gz
並在/opt目錄下新建目錄qt-4.7.3-arm64（qt-4.7.3-arm64是編譯完成后的安裝目錄):
mkdir qt-4.7.3-arm64
然后進入qt-everywhere-opensource-src-4.7.3目錄：
a.修改mkspecs/qws/linux-arm-gnueabi-g++/qmake.conf文件如下:
1 # 2 # qmake configuration for building with arm-none-linux-gnueabi-g++ 3 # 4 5 include(../../common/g++.conf) 6 include(../../common/linux.conf) 7 include(../../common/qws.conf) 8 9 # modifications to g++.conf 10 QMAKE_CC = aarch64-linux-gnu-gcc 11 QMAKE_CXX = aarch64-linux-gnu-g++ 12 QMAKE_LINK = aarch64-linux-gnu-g++ 13 QMAKE_LINK_SHLIB = aarch64-linux-gnu-g++ 14 15 # modifications to linux.conf 16 QMAKE_AR = aarch64-linux-gnu-ar cqs 17 QMAKE_OBJCOPY = aarch64-linux-gnu-objcopy 18 QMAKE_STRIP = aarch64-linux-gnu-strip 19 20 load(qt_config)
b.執行configure生成Makefile文件，命令如下：
./configure -opensource -prefix /opt/qt-4.7.3-arm64 -xplatform qws/linux-arm-gnueabi-g++ -embedded armv8 -release -webkit -no-cups -qt-zlib -qt-libjpeg -qt-libmng -qt-libpng -depths all -qt-gfx-linuxfb -qt-g fx-transformed -no-gfx-qvfb -qt-gfx-vnc -qt-gfx-multiscreen -qt-kbd-tty -no-openssl -no-phonon -no-phonon-backend -no-nas-sound -no-exceptions -svg -no-qt3support -no-multimedia -no-xmlpatterns -no-pch -con firm-license
配置成功顯示如下：
NOTICE: Atomic operations are not yet supported for this architecture. Qt will use the 'generic' architecture instead, which uses a single pthread_mutex_t to protect all atomic operations. This implementation is the slow (but safe) fallback implementation for architectures Qt does not yet support. Qt is now configured for building. Just run 'make'. Once everything is built, you must run 'make install'. Qt will be installed into /opt/qt-4.7.3-arm64 To reconfigure, run 'make confclean' and 'configure'.
然后：
make
注意：
1. qt4.7.3 configure時要加上-embedded armv8參數，armv8是arm芯片的架構(arm9對應armv5，arm11對應armv6，cortex-a8和cortex-a9對應armv7),不然會出現以下情況:
You have not explicitly asked to use pkg-config and are cross-compiling. pkg-config will not be used to automatically query cflag/lib parameters for dependencies This is the Qt for Linux/X11 Open Source Edition. You are licensed to use this software under the terms of the Lesser GNU General Public License (LGPL) versions 2.1. You are also licensed to use this software under the terms of the GNU General Public License (GPL) versions 3. You have already accepted the terms of the license. Creating qmake. Please wait... g++ -c -o option.o -m64 -pipe -DQMAKE_OPENSOURCE_EDITION -I. -Igenerators -Igenerators/unix -Igenerators/win32 -Igenerators/mac -Igenerators/symbian -I/opt/qt-everywhere-opensource-src-4.7.3/include -I/opt/qt-everywhere-opensource-src-4.7.3/include/QtCore -I/opt/qt-everywhere-opensource-src-4.7.3/src/corelib/global -I/opt/qt-everywhere-opensource-src-4.7.3/src/corelib/xml -I/opt/qt-everywhere-opensource-src-4.7.3/tools/shared -DQT_NO_PCRE -DQT_BUILD_QMAKE -DQT_BOOTSTRAPPED -DQLIBRARYINFO_EPOCROOT -DQT_NO_TEXTCODEC -DQT_NO_UNICODETABLES -DQT_NO_COMPONENT -DQT_NO_STL -DQT_NO_COMPRESS -I/opt/qt-everywhere-opensource-src-4.7.3/mkspecs/linux-g++-64 -DHAVE_QCONFIG_CPP -DQT_NO_THREAD -DQT_NO_QOBJECT -DQT_NO_GEOM_VARIANT option.cpp g++ -o "/opt/qt-everywhere-opensource-src-4.7.3/bin/qmake" project.o property.o main.o makefile.o unixmake2.o unixmake.o mingw_make.o option.o winmakefile.o projectgenerator.o meta.o makefiledeps.o metamakefile.o xmloutput.o pbuilder_pbx.o borland_bmake.o msvc_vcproj.o msvc_vcxproj.o msvc_nmake.o msvc_objectmodel.o msbuild_objectmodel.o symmake.o initprojectdeploy_symbian.o symmake_abld.o symmake_sbsv2.o symbiancommon.o registry.o epocroot.o qtextcodec.o qutfcodec.o qstring.o qtextstream.o qiodevice.o qmalloc.o qglobal.o qbytearray.o qbytearraymatcher.o qdatastream.o qbuffer.o qlist.o qfile.o qfsfileengine_unix.o qfsfileengine_iterator_unix.o qfsfileengine.o qfsfileengine_iterator.o qregexp.o qvector.o qbitarray.o qdir.o qdiriterator.o quuid.o qhash.o qfileinfo.o qdatetime.o qstringlist.o qabstractfileengine.o qtemporaryfile.o qmap.o qmetatype.o qsettings.o qlibraryinfo.o qvariant.o qvsnprintf.o qlocale.o qlinkedlist.o qurl.o qnumeric.o qcryptographichash.o qxmlstream.o qxmlutils.o -m64 Basic XLib functionality test failed! You might need to modify the include and library search paths by editing QMAKE_INCDIR_X11 and QMAKE_LIBDIR_X11 in /opt/qt-everywhere-opensource-src-4.7.3/mkspecs/qws/linux-arm-gnueabi-g++.
2.執行make后可能會報錯，不同的編譯器版本出現的錯誤不一樣，本人剛開始使用 ,aarch-linux-gnu 7.2.1版本編譯器，出現如下錯誤：
../../include/QtCore/../../src/corelib/tools/qmap.h: In instantiation of ‘T& QMap<Key, T>::operator[](const Key&) [with Key = int; T = inotify_event]’: io/qfilesystemwatcher_inotify.cpp:364:33: required from here ../../include/QtCore/../../src/corelib/tools/qmap.h:531:45: error: value-initialization of incomplete type ‘char []’ node = node_create(d, update, akey, T()); ^~~
google了一波並沒有找到解決辦法，個人感覺可能是qt代碼太老的關系，好多東西到現在的Qt5.11都已經棄用，編譯器太新導致出錯，之前用aarch64-linux-gnu 7.2.1編譯qt5.5.1並沒有出現這個錯誤，所以決定換個編譯器的版本嘗試一下。改用aarch64-linux-gnu 5.3.1版本后,沒有出現這個錯誤。
但是在后面編譯時出現了新的錯誤，如下：
runtime/JSValue.h: In constructor 'JSC::JSValue::JSValue(JSC::JSCell*)': runtime/JSValue.h:494:57: error: cast from 'JSC::JSCell*' to 'int32_t {aka int}' loses precision [-fpermissive] u.asBits.payload = reinterpret_cast<int32_t>(ptr); ^ runtime/JSValue.h: In constructor 'JSC::JSValue::JSValue(const JSC::JSCell*)': runtime/JSValue.h:506:78: error: cast from 'JSC::JSCell*' to 'int32_t {aka int}' loses precision [-fpermissive] u.asBits.payload = reinterpret_cast<int32_t>(const_cast<JSCell*>(ptr)); ^ make[1]: *** [.obj/release-static-emb-armv8/JSBase.o] Error 1 make[1]: Leaving directory `/opt/qt-everywhere-opensource-src-4.7.3/src/3rdparty/webkit/JavaScriptCore' make: *** [sub-javascriptcore-make_default-ordered] Error 2
google了一下，原來是Qt4.7的一個Bug,國外大胸弟們也是一頓操作，然而並沒有給出具體的解決辦法，想到在64位arm上跑，所以把494和506行的int32_t改成int64_t編譯通過了，但是編譯完成后並沒有生成webkit的動態庫，很是無語。這個錯誤就是編譯webkit第三方庫的時候出現的，為什么編譯通過后沒有libQtWebKit.so.4.7.3呢！
既然沒有生成webkit庫，那就在configure后面加上參數 -webkit，指明編譯這個庫。configure后生成新的Makefile,make繼續填坑。編譯過程中又出現了這個錯誤。打開JSValue.h文件發現是修改過的int64_t，執行command：
[root@jz4775dev]# find ./ -name JSValue.h ./src/3rdparty/webkit/WebCore/ForwardingHeaders/runtime/JSValue.h ./src/3rdparty/webkit/JavaScriptCore/runtime/JSValue.h ./src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSValue.h
原來有三個!
一個個來查看：
[root@jz4775dev]# vim ./src/3rdparty/webkit/WebCore/ForwardingHeaders/runtime/JSValue.h 1 #ifndef WebCore_FWD_JSValue_h 2 #define WebCore_FWD_JSValue_h 3 #include <JavaScriptCore/JSValue.h> 4 #endif
不是這個；
[root@jz4775dev]# vim ./src/3rdparty/webkit/JavaScriptCore/runtime/JSValue.h 487 488 inline JSValue::JSValue(JSCell* ptr) 489 { 490 if (ptr) 491 u.asBits.tag = CellTag; 492 else 493 u.asBits.tag = EmptyValueTag; 494 u.asBits.payload = reinterpret_cast<int32_t>(ptr); 495 #if ENABLE(JSC_ZOMBIES) 496 ASSERT(!isZombie()); 497 #endif 498 } 499 500 inline JSValue::JSValue(const JSCell* ptr) 501 { 502 if (ptr) 503 u.asBits.tag = CellTag; 504 else 505 u.asBits.tag = EmptyValueTag; 506 u.asBits.payload = reinterpret_cast<int32_t>(const_cast<JSCell*>(ptr)); 507 #if ENABLE(JSC_ZOMBIES) 508 ASSERT(!isZombie()); 509 #endif 510 }
就是你了，把int32_t改成int64_t后繼續編譯，編譯順利完成。
這時在 "ls lib/" 查看：
[root@jz4775dev]# ls lib/ fonts libQtCore.so libQtDeclarative.so.4.7 libQtNetwork.la libQtScript.la libQtScriptTools.so.4.7 libQtSvg.so libQtWebKit.la libQtXml.so libphonon.la libQtCore.so.4 libQtDeclarative.so.4.7.3 libQtNetwork.prl libQtScript.prl libQtScriptTools.so.4.7.3 libQtSvg.so.4 libQtWebKit.prl libQtXml.so.4 libphonon.prl libQtCore.so.4.7 libQtGui.la libQtNetwork.so libQtScript.so libQtSql.la libQtSvg.so.4.7 libQtWebKit.so libQtXml.so.4.7 libpvrQWSWSEGL.prl libQtCore.so.4.7.3 libQtGui.prl libQtNetwork.so.4 libQtScript.so.4 libQtSql.prl libQtSvg.so.4.7.3 libQtWebKit.so.4 libQtXml.so.4.7.3 libQAxContainer.prl libQtDBus.la libQtGui.so libQtNetwork.so.4.7 libQtScript.so.4.7 libQtSql.so libQtTest.la libQtWebKit.so.4.7 pkgconfig libQAxServer.prl libQtDBus.prl libQtGui.so.4 libQtNetwork.so.4.7.3 libQtScript.so.4.7.3 libQtSql.so.4 libQtTest.prl libQtWebKit.so.4.7.3 README libQt3Support.la libQtDeclarative.la libQtGui.so.4.7 libQtOpenGL.la libQtScriptTools.la libQtSql.so.4.7 libQtTest.so libQtXml.la libQt3Support.prl libQtDeclarative.prl libQtGui.so.4.7.3 libQtOpenGL.prl libQtScriptTools.prl libQtSql.so.4.7.3 libQtTest.so.4 libQtXmlPatterns.la libQtCore.la libQtDeclarative.so libQtMultimedia.la libQtOpenVG.la libQtScriptTools.so libQtSvg.la libQtTest.so.4.7 libQtXmlPatterns.prl libQtCore.prl libQtDeclarative.so.4 libQtMultimedia.prl libQtOpenVG.prl libQtScriptTools.so.4 libQtSvg.prl libQtTest.so.4.7.3 libQtXml.prl
libQtWebKit.so.4.7.3 有了，嗯...美滋滋！
然后執行command:
make install
就會把生成的庫等相干東西安裝在/opt/qt-4.7.3-arm64目錄下。至此，交叉編譯告一段落。下面的任務就是移植到arm開發板上。
3.移植到arm開發板上
方法很簡單，把qt-4.7.3-arm64打包，生成qt-4.7.3-arm64.tgz。把它放到開發板的上，放在哪你自己決定，我是同樣放在/opt目錄下,然后解壓。
編輯開發板上 /etc/profile文件，在最后一行添加如下環境變量：
# # Configure the runtime environment for Qt # export QTDIR=/opt/qt-4.7.3-arm64 export LD_LIBRARY_PATH=$QTDIR/lib:$LD_LIBRARY_PATH export QT_QWS_FONTDIR=$QTDIR/lib/fonts export QWS_SIZE=800x400 export QWS_DISPLAY=LinuxFb:/dev/fb0(這個根據開發板而定)
添加完后wq保存退出，執行command：
source /etc/profile
使修改生效，然后你就可以在你的開發板上運行你的qtdemo啦...
localhost:/opt/qt-4.7.3-arm64/examples/webkit # file fancybrowser/fancybrowser fancybrowser/fancybrowser: ELF 64-bit LSB executable, ARM aarch64, version 1 (SYSV), dynamically linked, interpreter /lib/ld-linux-aarch64.so.1, for GNU/Linux 3.7.0, BuildID[sha1]=68c7b85ea380524f07bcc49da63dff2505ddfb57, stripped 查看demo的可執行文件的類型，基於ARM aarch64，正確的。
《題外篇》
如果想要實現觸摸功能，需要編譯tslib.
4.編譯tslib
Tslib是一個開源的程序，能夠為觸摸屏驅動獲得的采樣提供諸如濾波、去抖、校准等功能，通常作為觸摸屏驅動的適配層，為上層的應用提供了一個統一的接口。在采用觸摸屏的移動終端中，觸摸屏性能的調試是個重要問題之一，因為電磁噪聲的緣故，觸摸屏容易存在點擊不准確、有抖動等問題。
到 github 下載 tslib最新版，地址：https://github.com/libts/tslib.git
下載后文件名為tslib-master.zip。
1.建立工作目錄
cd /opt mkdir tslib
2.編譯安裝tslib
將下載的tslib源碼復制到/opt目錄下，並解壓：
unzip tslib-master.zip cd tslib-master
3.編譯
配置tslib，安裝路徑可以通過 --prefix 參數設置，這里安裝到 /opt/tslib：
./autogen.sh ./configure CC=aarch64-linux-gnu-gcc CXX=aarch64-linux-gnu-g++ --host=aarch64-linux-gnu --prefix=/opt/tslib ac_cv_func_malloc_0_nonnull=yes
編譯安裝：
make make install
完成后，tslib會按安裝到主機 /opt/tslib 目錄下。 進入下一步之前，先將主機中 /opt/tslib/etc/ts.conf 文件第二行“#module_raw input”的注釋去掉，變為“module_raw input”，注意一定要頂格(哥哥編譯好時第二行的注釋符#已經去掉了)。
重新編譯Qt-4.7.3
這時qmake.conf文件修改為如下：
1 # 2 # qmake configuration for building with arm-none-linux-gnueabi-g++ 3 # 4 5 include(../../common/g++.conf) 6 include(../../common/linux.conf) 7 include(../../common/qws.conf) 8 9 # modifications to g++.conf 10 QMAKE_CC = aarch64-linux-gnu-gcc -lts 11 QMAKE_CXX = aarch64-linux-gnu-g++ -lts 12 QMAKE_LINK = aarch64-linux-gnu-g++ -lts 13 QMAKE_LINK_SHLIB = aarch64-linux-gnu-g++ -lts 14 15 # modifications to linux.conf 16 QMAKE_AR = aarch64-linux-gnu-ar cqs 17 QMAKE_OBJCOPY = aarch64-linux-gnu-objcopy 18 QMAKE_STRIP = aarch64-linux-gnu-strip 19 20 load(qt_config)
configure也要添加新的參數:
-no-mouse-qvfb -qt-mouse-linuxtp -qt-mouse-tslib -DQT_QLOCALE_USES_FCVT -DQT_NO_QWS_CURSOR -no-pch -I/opt/tslib/include -L/opt/tslib/lib -confirm-license
然后再make && make install
編譯好后把qt-4.7.3-arm64和tslib同時拷貝到開發板/opt下。 編輯/etc/profile添加環境變量：
export QTDIR=/opt/qt-4.7.3-arm64 export T_ROOT=/opt/tslib export PATH=$T_ROOT/bin:$PATH export LD_LIBRARY_PATH=$T_ROOT/lib:$QTDIR/lib:$LD_LIBRARY_PATH export TSLIB_CONSOLEDEVICE=none export TSLIB_FBDEVICE=/dev/fb0 export TSLIB_TSDEVICE=/dev/input/event0 export TSLIB_PLUGINDIR=$T_ROOT/lib/ts export TSLIB_CONFFILE=$T_ROOT/etc/ts.conf export TSLIB_CALIBFILE=/etc/pointercal export QWS_KEYBOARD=USB:/dev/input/event1 export QWS_MOUSE_PROTO=Tslib:/dev/input/event0 export QT_QWS_FONTDIR=$QTDIR/lib/fonts