Qt5.4.1移植到arm——Linuxfb篇

Qt5与Qt4对比有很大的改变，其最大的特性在于模块化，并且很明显的是不再见到Qt4用到的qws，Qt5新增了QPA系统，基于QPA使得Qt5移 植到一个新平台非常简单而又具有极强的底层扩展能力；同时，C++11 也获得全面支持，使用 C++11 新特性更为方便。下面讲述将Qt5.4.1移植到MYD-AM335X的步骤：

1、编译并安装tslib1.4。这部分按照“MYD-AM335X Linux 3.2.0 用户手册”第1.10.2章节的步骤即可，最终将安装到/usr/local/tslib中。


2、到https://download.qt.io/archive/qt/5.4/5.4.1/single/下载源码包qt-everywhere-opensource-src-5.4.1.tar.gz

3、解压：

1 2	$ tar xzf qt-everywhere-opensource-src-5.4.1.tar.gz $ cd qt-everywhere-opensource-src-5.4.1/

4、指定所用平台的arm架构以及交叉编译器：

1	$ vi qtbase/mkspecs/linux-arm-gnueabi-g++/qmake.conf

改成以下内容，实际应需要根据自己的开发环境作出相应改变：

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# # qmake configuration for building with arm-linux-gnueabi-g++ #   MAKEFILE_GENERATOR      = UNIX CONFIG                 += incremental QMAKE_INCREMENTAL_STYLE = sublib   QT_QPA_DEFAULT_PLATFORM = linuxfb QMAKE_CFLAGS_RELEASE   += -O2 -march=armv7-a QMAKE_CXXFLAGS_RELEASE += -O2 -march=armv7-a   include(../common/linux.conf) include(../common/gcc-base-unix.conf) include(../common/g++-unix.conf)   QMAKE_INCDIR += /usr/local/tslib/include QMAKE_LIBDIR += /usr/local/tslib/lib   # modifications to g++.conf QMAKE_CC                = arm-linux-gnueabihf-gcc -lts QMAKE_CXX               = arm-linux-gnueabihf-g++ -lts QMAKE_LINK              = arm-linux-gnueabihf-g++ -lts QMAKE_LINK_SHLIB        = arm-linux-gnueabihf-g++ -lts   # modifications to linux.conf QMAKE_AR                = arm-linux-gnueabihf-ar cqs QMAKE_OBJCOPY           = arm-linux-gnueabihf-objcopy QMAKE_NM                = arm-linux-gnueabihf-nm -P QMAKE_STRIP             = arm-linux-gnueabihf-strip load(qt_config)

5、根据自己的实际需求配置Qt：

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$ ./configure         -prefix /usr/local/qt5.4.1         -confirm-license         -opensource         -release          -make libs         -xplatform linux-arm-gnueabi-g++         -optimized-qmake         -pch         -qt-sql-sqlite         -qt-libjpeg         -qt-libpng         -qt-zlib         -tslib         -no-opengl         -no-sse2         -no-openssl         -no-nis         -no-cups         -no-glib         -no-dbus         -no-xcb         -no-xcursor -no-xfixes -no-xrandr -no-xrender         -no-separate-debug-info         -make examples -nomake tools -nomake tests -no-iconv

6、编译安装：

1 2	$ make $ sudo make install

7、移植Qt到开发板：
完成上述步骤后，qt5.4.1将被安装到/usr/local/qt5.4.1中。然后将/usr/local/中的qt5.4.1复制到开发板的/opt/目录中，将/usr/local/中的tslib复制到开发板的/usr/local/中。


8、设置开发板Qt环境变量：

1	root@MYD-AM335X:~# vi /etc/init.d/qt.sh

添加下面内容：

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export TSLIB_CONSOLEDEVICE=none export TSLIB_FBDEVICE=/dev/fb0   export TSLIB_TSDEVICE=/dev/input/event1 export TSLIB_CONFFILE=/usr/local/tslib/etc/ts.conf export TSLIB_PLUGINDIR=/usr/local/tslib/lib/ts export TSLIB_CALIBFILE=/etc/pointercal export LD_LIBRARY_PATH=/lib:/usr/lib:/usr/local/tslib/lib:/opt/qt5.4.1/lib export PATH=/bin:/sbin:/usr/bin/:/usr/sbin:/usr/local/tslib/bin   export QT_QPA_PLATFORM_PLUGIN_PATH=/opt/qt5.4.1/plugins export QT_QPA_PLATFORM=linuxfb:tty=/dev/fb0 export QT_QPA_FONTDIR=/opt/qt5.4.1/lib/fonts export QT_QPA_GENERIC_PLUGINS=tslib:$TSLIB_TSDEVICE

保存退出后使上面的环境变量生效：

1	root@MYD-AM335X:~# source /etc/init.d/qt.sh

9、运行一些example：

1	root@MYD-AM335x ~# /opt/qt5.4.1/examples/touch/pinchzoom/pinchzoom

1	root@MYD-AM335x ~# /opt/qt5.4.1/examples/svg/embedded/fluidlauncher/fluidlauncher

我们可以看到用linuxfb方式的运行的QT是没有窗体边框的，这是qt5的一个特点，似乎是其为了更好的转移到手机等移动终端。

./configure -prefix /opt/EmbedSky/gcc-4.6.2-glibc-2.13-linaro-multilib-2011.12/tq-linaro-toolchain/qt-5.2.1-embedded-arm-MuliTCS -xplatform linux-arm-fr
eescale-gnueabi-g++ -confirm-license -opensource -release -make libs -optimized-qmake -pch -qt-sql-sqlite -qt-libjpeg -qt-libpng -qt-zlib -tslib -no-sse
2 -no-openssl -no-nis -no-cups -no-glib  -no-separate-debug-info -nomake examples -nomake tools -nomake tests -no-iconv -skip webkit -opengl es2 -verbos
e -no-xcb-xlib -qt-xcb  -qpa xcb

#
# qmake configuration for building with arm-linux-gnueabi-g++
#

MAKEFILE_GENERATOR      = UNIX
CONFIG                 += incremental gdb_dwarf_index xlib
QMAKE_INCREMENTAL_STYLE = sublib

QMAKE_CFLAGS_RELEASE   += -O2 -march=armv7-a  -mfloat-abi=softfp -mfpu=neon


include(../common/linux.conf)
include(../common/gcc-base-unix.conf)
include(../common/g++-unix.conf)

# modifications to g++.conf
QMAKE_CC                = arm-fsl-linux-gnueabi-gcc
QMAKE_CXX               = arm-fsl-linux-gnueabi-g++
QMAKE_LINK              = arm-fsl-linux-gnueabi-g++
QMAKE_LINK_SHLIB        = arm-fsl-linux-gnueabi-g++

# modifications to linux.conf
QMAKE_AR                = arm-fsl-linux-gnueabi-ar cqs
QMAKE_OBJCOPY           = arm-fsl-linux-gnueabi-objcopy
QMAKE_NM                = arm-fsl-linux-gnueabi-nm -P
QMAKE_STRIP             = arm-fsl-linux-gnueabi-strip
load(qt_config)


#QMAKE_INCDIR += /opt/EmbedSky/gcc-4.6.2-glibc-2.13-linaro-multilib-2011.12/tq-linaro-toolchain/include  
#QMAKE_INCDIR += /opt/EmbedSky/gcc-4.6.2-glibc-2.13-linaro-multilib-2011.12/tq-linaro-toolchain/libX11/include
#QMAKE_LIBDIR += /opt/EmbedSky/gcc-4.6.2-glibc-2.13-linaro-multilib-2011.12/tq-linaro-toolchain/lib
#QMAKE_LIBDIR += /opt/EmbedSky/gcc-4.6.2-glibc-2.13-linaro-multilib-2011.12/tq-linaro-toolchain/qt-5.2.1-embedded-arm-MuliTCS/lib
#QMAKE_LIBDIR += /opt/EmbedSky/gcc-4.6.2-glibc-2.13-linaro-multilib-2011.12/tq-linaro-toolchain/libX11/lib
#QMAKE_LIBS+=-lXau -lxcb -lX11 -lX11-xcb

#QMAKE_INCDIR_OPENGL_ES2=/opt/EmbedSky/gcc-4.6.2-glibc-2.13-linaro-multilib-2011.12/tq-linaro-toolchain/include
#QMAKE_LIBDIR_OPENGL_ES2=/opt/EmbedSky/gcc-4.6.2-glibc-2.13-linaro-multilib-2011.12/tq-linaro-toolchain/lib
#QMAKE_LIBS_OPENGL_ES2=-lglapi -lGLESv2 -lEGL