PATCH: Revised fix for gold problem with weak undefined symbols

[Ian Lance Taylor]

"Cary Coutant" <ccoutant@google.com> writes:

>     * symtab.h (Symbol::is_strong_undefined): Removed unused function.
>     (Symbol::needs_plt_entry): Allow weak undefined symbols.
>     (Symbol::needs_dynamic_reloc): Allow weak undefined symbols when
>     building shared libraries.
>     * testsuite/Makefile.am (weak_undef_nonpic_test): New target.
>     (weak_undef_file1_nonpic.o, weak_undef_file2_nonpic.o)
>     (weak_undef_lib_nonpic.so, alt/weak_undef_lib_nonpic.so): New targets.
>     * testsuite/Makefile.in: Rebuild.
>     * testsuite/weak_undef.h: New file.
>     * testsuite/weak_undef_file1.cc: Add extra test cases.
>     * testsuite/weak_undef_file2.cc: Likewise.
>     * testsuite/weak_undef_test.cc: Likewise.

This is OK.

Thanks.

Ian