Greater flexibility in executing an alternative link-editor is provided with the link-editor -z altexec64 option, and the LD_ALTEXEC environment variable. See The 32–bit link-editor and 64–bit link-editor.
Symbol definitions that are generated using mapfiles can now be associated to ELF sections. See Defining Additional Symbols with a mapfile.
The link-editors now provide for the creation of static 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. See Program Startup.