Installing gp-xerces

To ensure that Greenplum can successfully compile GPORCA, install gp-xerces.

1. Go to the directory.

   cd /opt/tool 

2. Download the gp-xerces source code and upload it to /opt/tool.

   Download link of the gp-xerces source code: https://gitee.com/WilliamLeoV/gp-xerces/tree/v3.1.2-p1/

3. Decompress the package and install gp-xerces.

   tar -xvf v3.1.2-p1
   cd gp-xerces-3.1.2-p1 
   ./configure
   make -j `nproc`

4. Set environment variables and load the dynamic library.

   vim /etc/profile
   export LD_LIBRARY_PATH=${LD_LIBRARY_PATH}:/usr/local/lib
   source /etc/prfile