qt移植aarch64

引用中给出了在移植qt到aarch64平台的配置信息。要将qt移植到aarch64平台，需要进行以下步骤：
1. 使用arm64交叉编译器进行编译。在`qtbase/mkspecs/linux-arm-gnueabi-g/qmake.conf`文件中，修改以下参数：

    QMAKE_CC = aarch64-linux-gnu-gcc
    QMAKE_CXX = aarch64-linux-gnu-g++
    QMAKE_LINK = aarch64-linux-gnu-g++
    QMAKE_LINK_SHLIB = aarch64-linux-gnu-g++
    QMAKE_AR = aarch64-linux-gnu-ar cqs
    QMAKE_OBJCOPY = aarch64-linux-gnu-objcopy
    QMAKE_NM = aarch64-linux-gnu-nm -P
    QMAKE_STRIP = aarch64-linux-gnu-strip

2. 修改`qmake`配置文件。在配置文件中添加以下内容：

    MAKEFILE_GENERATOR = UNIX
    CONFIG  = incremental
    QMAKE_INCREMENTAL_STYLE = sublib
    QT_QPA_DEFAULT_PLATFORM = linuxfb
    QMAKE_CFLAGS_RELEASE  = -O2 -march=armv8-a -lts
    QMAKE_CXXFLAGS_RELEASE  = -O2 -march=armv8-a -lts
    include(../common/linux.conf)
    include(../common/gcc-base-unix.conf)
    include(../common/g++-unix.conf)
    QMAKE_CC = aarch64-linux-gnu-gcc
    QMAKE_CXX = aarch64-linux-gnu-g++
    QMAKE_LINK = aarch64-linux-gnu-g++
    QMAKE_LINK_SHLIB = aarch64-linux-gnu-g++
    QMAKE_AR = aarch64-linux-gnu-ar cqs
    QMAKE_OBJCOPY = aarch64-linux-gnu-objcopy
    QMAKE_NM = aarch64-linux-gnu-nm -P
    QMAKE_STRIP = aarch64-linux-gnu-strip
    load(qt_config)

3. 运行配置命令。使用以下命令运行`configure`脚本来进行配置：

    ./configure -prefix /usr/local/qt-5.6-arm -release -xplatform linux-arm-gnueabi-g -make libs -optimized-qmake -pch -qt-sql-sqlite -qt-libjpeg -qt-zlib -qt-libpng