connect.o: In function `ConnectWidget::mousePressEvent(QMouseEvent*)':
connect.cpp:(.text+0x190): undefined reference to `QWidget::erase_helper(int, int, int, int)'
/opt/xiongbiao/smdk2416/qt-embedded-tp-arm-install//lib/libQtGui.so: undefined reference to `deflateInit_'
/opt/xiongbiao/smdk2416/qt-embedded-tp-arm-install//lib/libQtGui.so: undefined reference to `deflateInit2_'
/opt/xiongbiao/smdk2416/qt-embedded-tp-arm-install//lib/libQtGui.so: undefined reference to `compress'
/opt/xiongbiao/smdk2416/qt-embedded-tp-arm-install//lib/libQtGui.so: undefined reference to `deflate'
/opt/xiongbiao/smdk2416/qt-embedded-tp-arm-install//lib/libQtGui.so: undefined reference to `deflateEnd'
/opt/xiongbiao/smdk2416/qt-embedded-tp-arm-install//lib/libQtGui.so: undefined reference to `crc32'
/opt/xiongbiao/smdk2416/qt-embedded-tp-arm-install//lib/libQtGui.so: undefined reference to `inflate'
/opt/xiongbiao/smdk2416/qt-embedded-tp-arm-install//lib/libQtGui.so: undefined reference to `inflateInit2_'
/opt/xiongbiao/smdk2416/qt-embedded-tp-arm-install//lib/libQtGui.so: undefined reference to `inflateInit_'
/opt/xiongbiao/smdk2416/qt-embedded-tp-arm-install//lib/libQtGui.so: undefined reference to `inflateEnd'
/opt/xiongbiao/smdk2416/qt-embedded-tp-arm-install//lib/libQtGui.so: undefined reference to `inflateReset'
/opt/xiongbiao/smdk2416/qt-embedded-tp-arm-install//lib/libQtGui.so: undefined reference to `deflateReset'
collect2: ld returned 1 exit status
make: *** [drawlines] Error 1
编译QT4.5出错了，请问下是什么原因？
