https://manpages.ubuntu.com/manpages/xenial/man3/ExtUtils::XSSymSet.3perl.html
Ubuntu Manpage: ExtUtils::XSSymSet - keep sets of symbol names palatable to the VMS linker
keep sets of symbol names palatable to the VMS linker
https://perldoc.perl.org/5.40.4/ExtUtils::XSSymSet
ExtUtils::XSSymSet - keep sets of symbol names palatable to the VMS linker - Perldoc Browser