Topic:

Some Linux distributions with SELinux enabled may prevent IDL from running under the default security context. This TechTip is a workaround for CR#41937

Discussion:

Newer Linux distributions have enabled new kernel security extensions from the SELinux project at the NSA. These extensions allow finer-grained control over system security. However, SELinux also changes some default system behaviors, such as shared library loading, that can be problematic to third party programs.

If you receive the error message "cannot restore segment prot after reloc: Permission denied" when launching IDL, then your SELinux configuration is preventing IDL from launching.

• Change the default security context for IDL by issuing the command:
  
  chcon -t texrel_shlib_t /usr/local/rsi/idl_6.1/bin/bin.linux.x86/*.so
  
  
• Disabling SELinux altogether by setting the line
  
  SELINUX=disabled
  
  

  in your /etc/sysconfig/selinux file.

For more information about SELinux, please consult your Linux distribution vendor.