Linker and Libraries Updates

Starting with this release, there is greater flexibility in executing an alternative link-editor with the link-editor -z altexec64 option and the LD_ALTEXEC environment variable.

Symbol definitions that are generated using mapfiles can now be associated to the executable and linking format (ELF) sections.

The link-editors now enable the creation of static thread-local storage (TLS) within shared objects. In addition, a backup TLS reservation is established to provide for limited use of static TLS within post-startup shared objects.