* config/obj-elf.c (elf_frob_symbol): Support
".symver name,name2@@@nodename".
(elf_frob_file_before_adjust): Likewise.
* doc/as.texinfo: Updated for ".symver name,name2@@@nodename"
and ".symver name,name2@@@nodename".
Fix a typo.
* doc/as.texinfo (.symver): Updated for versioned symbol
reference.
* obj.h (format_ops): Add the frob_file_before_adjust field.
* config/obj-aout.c (aout_format_ops): Set the
frob_file_before_adjust field to 0.
* config/obj-coff.c (coff_format_ops): Likewise.
* config/obj-ecoff.c (ecoff_format_ops): Likewise.
* config/obj-elf.c (obj_elf_symver): Allow duplicated version
name.
(elf_frob_file_before_adjust): New function to remove unneeded
versioned symbols from the symbol table.
(elf_format_ops): Set the frob_file_before_adjust field to
elf_frob_file_before_adjust.
* config/obj-elf.h (obj_frob_file_before_adjust): Defined if
not defined.
* config/obj-multi.h (obj_frob_file_before_adjust): Defined.
(parse_args): Add --no-warn, --warn, --fatal-warnings,
which become 'W', OPTION_WARN, and OPTION_WARN_FATAL.
(parse_args): Parse the new options.
(main): If there were warnings, and --fatal-warnings
was specified, print an error.
* as.h: New variable, flag_fatal_warnings, for new option.