何解？-static-libstdc++ 改成 -lstdc++ 就出的问题

./NetCenter_Service: /usr/lib/libstdc++.so.6: version `GLIBCXX_3.4.15' not found (required by ./NetCenter_Service)
./NetCenter_Service: /usr/lib/libstdc++.so.6: version `GLIBCXX_3.4.15' not found (required by ../NetCenter_Release/NetEngine_Core/Bin/libNetEngine_ManagePool.so)
./NetCenter_Service: /usr/lib/libstdc++.so.6: version `GLIBCXX_3.4.15' not found (required by ../NetCenter_Release/NetEngine_WorkLogic/Bin/libNetLogic_DetachLayer.so)
./NetCenter_Service: /usr/lib/libstdc++.so.6: version `GLIBCXX_3.4.15' not found (required by ../NetCenter_Release/NetEngine_Alarm/Bin/libNetEngine_Alarm.so)
./NetCenter_Service: /usr/lib/libstdc++.so.6: version `GLIBCXX_3.4.15' not found (required by ../NetCenter_Release/NetEngine_WorkLogic/Bin/libNetLogic_MemoryTable.so)


怪事 ，我明明重新编译 为啥还会出这个问题？

CentOS 5.4
G++4.6.4 。