Qt5 在Linux 下的编译，该怎么处理

Qt5 在Linux 下的编译，该怎么处理

[wanglj@localhost testQT]$ make
g++ -o testQT main.o -L/opt/Qt5.1.1/5.1.1/gcc_64/lib -lqt-mt -lXext -lX11 -lm
main.o: In function `main':
/home/wanglj/testQT/main.cpp:6: undefined reference to `QApplication::QApplication(int&, char**, int)'
main.o: In function `QString':
/usr/include/QtCore/qstring.h:413: undefined reference to `QString::fromAscii_helper(char const*, int)'
main.o: In function `main':
/home/wanglj/testQT/main.cpp:7: undefined reference to `QLabel::QLabel(QString const&, QWidget*, QFlags)'
main.o: In function `~QString':
/usr/include/QtCore/qstring.h:869: undefined reference to `QString::free(QString::Data*)'
/usr/include/QtCore/qstring.h:869: undefined reference to `QString::free(QString::Data*)'
collect2: ld 返回 1
make: *** [testQT] 错误 1

但若直接用 qtcreator 打开编译，则无错误
并且find -name libqt-mt* 也找不到其他版本的该文件

用qtcreator编译好的可执行文件，也找不到连接该lib文件

[wanglj@localhost build-testQT-桌面-Debug]$ ldd testQT
linux-vdso.so.1 => (0x00007fff4ddff000)
libQtGui.so.4 => /usr/lib64/libQtGui.so.4 (0x000000397f000000)
libQtCore.so.4 => /usr/lib64/libQtCore.so.4 (0x000000397ea00000)
libpthread.so.0 => /lib64/libpthread.so.0 (0x0000003978600000)
libstdc++.so.6 => /usr/lib64/libstdc++.so.6 (0x00007fda6a081000)
libm.so.6 => /lib64/libm.so.6 (0x0000003977a00000)
libgcc_s.so.1 => /lib64/libgcc_s.so.1 (0x0000003983a00000)
libc.so.6 => /lib64/libc.so.6 (0x0000003977e00000)
libgthread-2.0.so.0 => /lib64/libgthread-2.0.so.0 (0x000000397a600000)
librt.so.1 => /lib64/librt.so.1 (0x0000003978e00000)
libglib-2.0.so.0 => /lib64/libglib-2.0.so.0 (0x0000003979200000)
libpng12.so.0 => /usr/lib64/libpng12.so.0 (0x000000397be00000)
libz.so.1 => /lib64/libz.so.1 (0x0000003978a00000)
libfreetype.so.6 => /usr/lib64/libfreetype.so.6 (0x000000397ba00000)
libgobject-2.0.so.0 => /lib64/libgobject-2.0.so.0 (0x0000003979e00000)
libSM.so.6 => /usr/lib64/libSM.so.6 (0x0000003985a00000)
libICE.so.6 => /usr/lib64/libICE.so.6 (0x0000003984e00000)
libXi.so.6 => /usr/lib64/libXi.so.6 (0x000000397ce00000)
libXrender.so.1 => /usr/lib64/libXrender.so.1 (0x000000397d600000)
libXrandr.so.2 => /usr/lib64/libXrandr.so.2 (0x000000397de00000)
libXfixes.so.3 => /usr/lib64/libXfixes.so.3 (0x000000397da00000)
libXcursor.so.1 => /usr/lib64/libXcursor.so.1 (0x000000397e200000)
libXinerama.so.1 => /usr/lib64/libXinerama.so.1 (0x000000397e600000)
libfontconfig.so.1 => /usr/lib64/libfontconfig.so.1 (0x000000397d200000)
libXext.so.6 => /usr/lib64/libXext.so.6 (0x000000397c600000)
libX11.so.6 => /usr/lib64/libX11.so.6 (0x000000397b600000)
libdl.so.2 => /lib64/libdl.so.2 (0x0000003978200000)
/lib64/ld-linux-x86-64.so.2 (0x0000003977600000)
libuuid.so.1 => /lib64/libuuid.so.1 (0x0000003983600000)
libexpat.so.1 => /lib64/libexpat.so.1 (0x000000397c200000)
libxcb.so.1 => /usr/lib64/libxcb.so.1 (0x000000397ae00000)
libXau.so.6 => /usr/lib64/libXau.so.6 (0x000000397aa00000)

------解决方案--------------------
INCPATH = -I/usr/lib64/qt-3.3/mkspecs/default -I. -I. -I$(QTDIR)/include
这一行看上去你调用的qmake不是5.1.1的。试试指定完整路径运行qmake
/opt/Qt5.1.1/5.1.1/gcc_64/bin/qmake testQT.pro

打开命令终端面板输入：sudo apt-get install gdb 如图所示： 即可安装，如果还是不可以，那就使用下面这种方式安装： 打开终端输入： wget ftp://ftp.gnu.org/gnu/gdb/gdb-7.9.tar.gz 下载完毕后解压 tar -zxvf /gdb-7.9.tar.gz 然后进行安装即可