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目前使用的板子是IMX6，

下载yocto开发环境imx-4.1.15-2.1.0_ga，

1、repo命令是

# ~/bin/repo init -u git://git.freescale.com/imx/fsl-arm-yocto-bsp.git -b imx-4.1.15-1.0.0_ga

2、编译的sysroot命令

# bitbake fsl-image-qt5 

3、交叉编译环境命令

bitbake meta-toolchain-qt5

4、生成文件系统命令

#sh tmp/deploy/sdk/fsl-imx-fb-glibc-x86_64-meta-toolchain-qt5-cortexa9hf-vfp-neon-toolchain-4.1.15-1.2.0.sh

然后编译QT5.12

注：（yocto交叉编译工具为arm-poky-linux-gnueabi-gcc,我用的是arm-linux-gnueabihf-gcc）

#

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

#

MAKEFILE_GENERATOR      = UNIX

CONFIG                 += incremental

QMAKE_INCREMENTAL_STYLE = sublib

include(../common/linux.conf)

include(../common/gcc-base-unix.conf)

include(../common/g++-unix.conf)

QMAKE_INCDIR_OPENGL_ES2 += /opt/fsl-imx-fb/4.1.15-1.2.0/sysroots/cortexa9hf-vfp-neon-poky-linux-gnueabi/usr/include  

QMAKE_LIBDIR_OPENGL_ES2 += /opt/fsl-imx-fb/4.1.15-1.2.0/sysroots/cortexa9hf-vfp-neon-poky-linux-gnueabi/usr/lib

QMAKE_INCDIR           += /opt/fsl-imx-fb/4.1.15-1.2.0/sysroots/cortexa9hf-vfp-neon-poky-linux-gnueabi/usr/include  

QMAKE_LIBDIR           += /opt/fsl-imx-fb/4.1.15-1.2.0/sysroots/cortexa9hf-vfp-neon-poky-linux-gnueabi/usr/lib

QMAKE_LIBS             += -lz -lbz2 -lpng -lfreetype -lexpat -lxml2 -lfontconfig

QMAKE_LIBS_EGL         += -lEGL

QMAKE_LIBS_OPENGL_ES2  += -lGLESv2 -lEGL -lGAL

QMAKE_LIBS_OPENVG      += -lOpenVG -lEGL -lGAL

IMX6_CFLAGS           =-march=armv7-a  -mfloat-abi=hard -mfpu=neon -mtune=cortex-a9 -DLINUX=1 -DEGL_API_FB=1 -fPIC

QMAKE_CFLAGS           += $$IMX6_CFLAGS

QMAKE_CXXFLAGS         += $$IMX6_CFLAGS

DISTRO_OPTS+= hard-float

#Preferred eglfs backend

EGLFS_DEVICE_INTEGRATION= eglfs_viv

QT_QPA_DEFAULT_PLATFORM= eglfs

QMAKE_CFLAGS_RELEASE   += -O2 $$QMAKE_CFLAGS

QMAKE_CXXFLAGS_RELEASE += -O2 $$QMAKE_CXXFLAGS

# modifications to g++.conf

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_NM                = arm-linux-gnueabihf-nm -P

QMAKE_STRIP             = arm-linux-gnueabihf-strip

load(qt_config)

 ./configure -prefix /Qt5.12x_opengl -opensource -confirm-license -shared -release -xplatform linux-arm-gnueabihf-g++ -qt-pcre -no-libproxy -no-pch -no-rpath -no-alsa -no-cups -dbus -no-directfb -evdev -no-harfbuzz -no-iconv -no-kms -no-openvg -webengine-icu  -icu -qt-zlib -qt-libpng -qt-freetype  -sysconfdir /Qt5.12x_opengl/sysconf -nomake tests -nomake examples -eglfs -opengl es2 -device-option CROSS_COMPILE=/opt/fsl-imx-fb/4.1.15-1.2.0/sysroots/x86_64-pokysdk-linux/usr/bin/arm-poky-linux-gnueabi/arm-poky-linux-gnueabi- -sysroot /opt/fsl-imx-fb/4.1.15-1.2.0/sysroots/cortexa9hf-vfp-neon-poky-linux-gnueabi -v

编译完成之后将库复制到/usr/local目录下

ARM板配置环境

export QTDIR=/usr/local

export PATH=$QTDIR:$PATH

export QT_QPA_PLATFORM_PLUGIN_PATH=$QTDIR/plugins

export QT_QPA_PLATFORM=eglfs:tty=/dev/fb0

export QT_QPA_FONTDIR=$QTDIR/lib/fonts

export QT_QPA_GENERIC_PLUGINS=evdevtouch:$TSLIB_TSDEVICE

export LD_LIBRARY_PATH=$QTDIR:$QTDIR/lib/:$QT_QPA_PLATFORM_PLUGIN_PATH:$QT_QPA_FONTDIR:$LD_LIBRARY_PATH

export QML2_IMPORT_PATH=/usr/local/qml

运行程序后./target -platform eglfs

qt.qpa.plugin: Could not load the Qt platform plugin "eglfs" in "/usr/local/plugins" even though it was found.

This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.

Available platform plugins are: eglfs, linuxfb, minimal, minimalegl, offscreen, vnc, webgl.

Aborted

下载了两次yocto都是一样的结果，求指导