qt编译数据库

记住要在.pro文件中添加QT+=sql不然的话会出现好多的问题。

 

使用QSqlTableModel的时候显示中文的时候要注意''可能导致 没有输出结果 。

 

 

 

我的linux版本编译程序时出现错误，如下：

         Undefined reference to “FT_Library_SetLcdFilter”

原因是缺少或者版本过低，安装 freetype-2.4.4, 下载安装：

./configure --sysconfdir=/etc --prefix=/usr --mandir=/usr/share/man

make

make install

 

 

 

/opt/qtsdk-2010.02/qt/lib/libQtGui.so: undefined reference to `FcFreeTypeQueryFace'

If you get this error under RHEL or CentOS 5.x: /home/esutton/qtsdk-2010.02/qt/lib/libQtGui.so: undefined reference to `FcFreeTypeQueryFace' collect2: ld returned 1 exit status Apparently libQtGui.so fails trying to use the libfontconfig `FcFreeTypeQueryFace' method. Prior to version 2.4.2 it either did not exist or perhaps the signature was changed in version 2.4.2. Not sure which, but an updated version needs to be installed to: '''/usr/lib/libfontconfig.so.1''' How to Fix Download sources and configure to install where it expects to find it: cd /usr/src wget tar -zxf fontconfig-2.4.2.tar.gz cd fontconfig-2.4.2 ./configure -prefix=/usr make make install <- Run as root or use sudo After doing this, you do not need to add the fontconfig library location to your Qt project’s .pro file. LIBS += -L/opt/fontconfig-2.4.2/lib This has worked for me on RHEL 5.3. I hope this helps! -Ed