qt5.6在3531板子上没有反应。

export QT_QPA_PLATFORM='linuxfb:/dev/fb0' 改成export QT_QPA_PLATFORM='linuxfb:fb=/dev/fb0'

[quote][url=forum.php?mod=redirect&goto=findpost&pid=37079&ptid=12512]lishiqi 发表于 2016-9-2 15:07[/url]
export QT_QPA_PLATFORM='linuxfb:/dev/fb0' 改成export QT_QPA_PLATFORM='linuxfb:fb=/dev/fb0'[/quote]

好的，谢谢，我试一下。

[quote][url=forum.php?mod=redirect&goto=findpost&pid=37079&ptid=12512]lishiqi 发表于 2016-9-2 15:07[/url]
export QT_QPA_PLATFORM='linuxfb:/dev/fb0' 改成export QT_QPA_PLATFORM='linuxfb:fb=/dev/fb0'[/quote]

你好，我试了下。
# export
export HOME='/root'
export LD_LIBRARY_PATH='/usr/local/lib:/usr/lib:/opt/Qt-5.6.1/hisiv100nptl/lib'
export LOGNAME='root'
export OLDPWD='/root'
export PATH='/usr/bin:/usr/sbin:/bin:/sbin'
export PWD='/opt/nfs'
export QT_QPA_FONTDIR='/opt/Qt-5.6.1/hisiv100nptl/lib/fonts'
export QT_QPA_PLATFORM_PLUGIN_PATH='/opt/Qt-5.6.1/hisiv100nptl/plugins'
export SHELL='/bin/sh'
export TERM='vt102'
export USER='root'
# ./helloworld3
This application failed to start because it could not find or load the Qt platform plugin "xcb"
in "/opt/Qt-5.6.1/hisiv100nptl/plugins".

Available platform plugins are: linuxfb, minimal, offscreen.

Reinstalling the application may fix this problem.
Aborted
# ls /opt/Qt-5.6.1/hisiv100nptl/plugins/
/opt/Qt-5.6.1/hisiv100nptl/plugins/bearer/                 /opt/Qt-5.6.1/hisiv100nptl/plugins/imageformats/           /opt/Qt-5.6.1/hisiv100nptl/plugins/platforms/
/opt/Qt-5.6.1/hisiv100nptl/plugins/generic/                /opt/Qt-5.6.1/hisiv100nptl/plugins/platforminputcontexts/
# ls /opt/Qt-5.6.1/hisiv100nptl/plugins/platforms/
libqlinuxfb.so    libqminimal.so    libqoffscreen.so
#

这个是我先运行 sample_vio再运行helloworld3的输出

如果我不运行sample，运行那个根据guitest修改过的helloworld，会报海思的错误码。
# ./helloworld1444
failed with 0xa00f8010!
This application failed to start because it could not find or load the Qt platform plugin "xcb"
in "/opt/Qt-5.6.1/hisiv100nptl/plugins".

Available platform plugins are: linuxfb, minimal, offscreen.

Reinstalling the application may fix this problem.
Aborted
#


////////
我看了下goodman编译的qt5.6.0, /plugins/platforms也是只有这三个文件，没有xcb相关的。
libqlinuxfb.so    libqminimal.so    libqoffscreen.so

This application failed to start because it could not find or load the Qt platform plugin "xcb"
是我变量没加。不过加上了，还是没有反应呢。

编译时加上 -no-xcb 选项

./configure --prefix=/opt/qt5 -opensource -confirm-license -c++std c++98 -qt-sql-sqlite -plugin-sql-sqlite -no-qml-debug -qt-zlib -qt-libpng -qt-libjpeg -qt-freetype -no-harfbuzz -no-openssl -no-libproxy -nomake examples -no-nis -no-cups -no-tslib -no-icu -no-fontconfig -no-pch -no-dbus -no-use-gold-linker -no-xcb -no-eglfs -no-kms -no-gbm -no-directfb  -xplatform linux-arm-hisiv400-g++
这是我QT5.6的编译参数

请问有遇到如下错误吗？
scriptast.o obj/release/qscriptastvisitor.o obj/release/qscriptgrammar.o obj/release/qscriptsyntaxchecker.o obj/release/qscriptlexer.o obj/release/moc_qscriptextensionplugin.o  -L/home/yj/work/qt5.6/qt5.6.1-1/qt-everywhere-opensource-src-5.6.1/qtbase/lib -lQt5Core -lpthread  
obj/release/JSClassRef.o: In function `OpaqueJSClassContextData::~OpaqueJSClassContextData()':
JSClassRef.cpp:(.text+0xd80): undefined reference to `__sync_sub_and_fetch_4'
obj/release/JSClassRef.o: In function `OpaqueJSClassContextData::~OpaqueJSClassContextData()':
JSClassRef.cpp:(.text+0x1208): undefined reference to `__sync_sub_and_fetch_4'
obj/release/JSClassRef.o: In function `OpaqueJSClass::create(JSClassDefinition const*)':
JSClassRef.cpp:(.text+0x14f4): undefined reference to `__sync_sub_and_fetch_4'
obj/release/JSClassRef.o: In function `OpaqueJSClassContextData::OpaqueJSClassContextData(OpaqueJSClass*)':
JSClassRef.cpp:(.text+0x17b4): undefined reference to `__sync_add_and_fetch_4'
obj/release/JSClassRef.o: In function `OpaqueJSClassContextData::OpaqueJSClassContextData(OpaqueJSClass*)':
JSClassRef.cpp:(.text+0x1f98): undefined reference to `__sync_add_and_fetch_4'
obj/release/JSClassRef.o: In function `QTWTF::ThreadSafeShared::deref()':
JSClassRef.cpp:(.text._ZN5QTWTF16ThreadSafeSharedI14OpaqueJSStringE5derefEv[QTWTF::ThreadSafeShared::deref()]+0xc): undefined reference to `__sync_sub_and_fetch_4'
obj/release/JSClassRef.o: In function `QTWTF::ThreadSafeShared::deref()':
JSClassRef.cpp:(.text._ZN5QTWTF16ThreadSafeSharedI13OpaqueJSClassE5derefEv[QTWTF::ThreadSafeShared::deref()]+0xc): undefined reference to `__sync_sub_and_fetch_4'
obj/release/JSClassRef.o: In function `QTJSC::JSCallbackObject::getOwnPropertySlot(QTJSC::ExecState*, QTJSC::Identifier const&, QTJSC::PropertySlot&)':

http://blog.csdn.net/wangmingape/article/details/24545775
我找到这个解决方法，
进入Qt源码目录：

cd qt-everywhere-opensource-src-4.8.6

然后：

vim src/script/Makefile

修改：

在LIBS  = 。。。。。。。。。。。。。的结尾添加 -L/opt -llinux-atomic

保存，继续make，就OK了。




vi qtscript/src/Makefile  但qt5.6.1的这里面没有LIBS

是改的文件不对，可以了。之前弄的忘了。今天又重新再编译一遍。

等会再放在板子上试试。