关于QTE4.4.2的编译问题(undefined reference to `QDnotifyFileSystemWatcherEngine::create())

[rzsheng]

我在编译 qt-embedded-linux-opensource-src-4.4.2 的时候遇到如下问题，
请各位高手指点迷津，谢谢了！

/qt-embedded-linux-opensource-src-4.4.2/lib/libQtCore.so: undefined reference to `QInotifyFileSystemWatcherEngine::create()'
/qt-embedded-linux-opensource-src-4.4.2/lib/libQtCore.so: undefined reference to `QDnotifyFileSystemWatcherEngine::create()'
collect2: ld returned 1 exit status
make[3]: *** [screenshot] Error 1
make[3]: Leaving directory `/qt-embedded-linux-opensource-src-4.4.2/examples/desktop/screenshot'
make[2]: *** [sub-screenshot-make_default-ordered] Error 2
make[2]: Leaving directory `/qt-embedded-linux-opensource-src-4.4.2/examples/desktop'
make[1]: *** [sub-desktop-make_default] Error 2
make[1]: Leaving directory `/qt-embedded-linux-opensource-src-4.4.2/examples'
make: *** [sub-examples-make_default-ordered] Error 2

[rzsheng]

此问题已经解决，再问一个问题：

在目标板上运行QT应用程序的时候提示如下错误：
QFontDatabase: Cannot find font directory /usr/local/Trolltech/QtEmbedded-4.4.2-arm/lib/fonts - is Qt installed correctly?

为何我一定要把QT安装到那个目录：/usr/local/Trolltech/QtEmbedded-4.4.2-arm/lib/


我通过export QTDIR=/usr/local/lib
指定的环境变量为何不起作用，是不是不能改变这个路径呢？

请知道的人指教，谢谢！

[bshawk]

try QTEDIR !

[rzsheng]

这个问题我也解决了，权当散分吧。

[rzsheng]

明日中午前揭帖！

[fox000002]

jf

[nipiao2]

linux 群 8709932 欢迎大家的加入

[rzsheng]

楼上老兄的广告太多了吧

[otis_dlut]

问题怎么解决的也不说
恶心！！！！！！！！！！

[otis_dlut]

在官方网站上找的消息，还没有验证是否正确，先贴过来，给需要的人

When creating the mkspec for a embedded target if the name of the directory does not match "linux-*" then the following build error will be seen.
undefined reference to `QDnotifyFileSystemWatcherEngine::create()'
see also:
http://doc.trolltech.com/4.4/qt-embedded-crosscompiling.html#step-2-create-a-target-specific-qmake-specification

[youthboy]

QInotifyFileSystemWatcherEngine::create 收藏
error1:
libQtCore.so: undefined reference to `QInotifyFileSystemWatcherEngine::create()'

resolution:
edit ./src/corelib/io/io.pri
find linux-*:
append your cross-toolchain's prefix after it

eg:
my toolchains's prefix is arm_xxxxx
so....
68 linux-*|arm*:{
69 SOURCES += \
70 io/qfilesystemwatcher_inotify.cpp \
71 io/qfilesystemwatcher_dnotify.cpp
72
73 HEADERS += \
74 io/qfilesystemwatcher_inotify_p.h \
75 io/qfilesystemwatcher_dnotify_p.h
76 }

error2:
libQtCore.so: undefined reference to `clock_gettime'

resolution:
append "-lrt" parameters after the "./configure" so that the compiler can find the define in librt.



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