General Description: Chapter 2 of the CORE Generator User Guide for the 2.1i release incorrectly states that the $XILINX/coregen/ip directory must have permissions of 777 (global Read, Write, and Execute Permissions).
解决方案
This statement was based on what was known at the time of publishing In fact, the $XILINX/coregen/ip directory only needs global Read and Execute permissions (755). The main requirement is that the resources.lib FILE in $XILINX/coregen/ip have universal Write permissions for proper operation of COREGen. It is not critical that the "ip" directory have its permissions set in this manner.