Add option --weak-unresolved-symbols to treat unresolved as weak references.
authorSriraman Tallam <tmsriram@google.com>
Thu, 23 Apr 2015 20:48:24 +0000 (13:48 -0700)
committerSriraman Tallam <tmsriram@google.com>
Thu, 23 Apr 2015 20:50:48 +0000 (13:50 -0700)
commit65eb8c79be0c71f9b52d14563c0817fc5ca33c0d
treefed2f9b9f1b24d2ef032547a893173a8edf92771
parent2ca4ff6d5b2217faba14b80f88189a42520dcf8f
Add option --weak-unresolved-symbols to treat unresolved as weak references.

This patch adds option --weak-unresolved-symbols to treat unresolved symbols as
weak references.  This is helpful when we want the link to succeed with unresolved
symbols and the dynamic loader to not complain at run-time.  Option
--warn-unresolved-symbols lets the link succeed but could fail at run-time with
unresolved symbol warnings especially when the unresolved symbols have GOT entries
and dynamic relocations against them, like when -fPIE is used.

2015-04-23  Sriraman Tallam  <tmsriram@google.com>
* options.h (--weak-unresolved-symbols): New option.
* symtab.cc (Symbol_table::sized_write_globals): Change symbol
binding to weak with new option.
* symtab.h (is_weak_undefined): Check for new option.
(is_strong_undefined): Check for new option.
* testsuite/Makefile.am (weak_unresolved_symbols_test): New test.
* testsuite/Makefile.in: Regenerate.
* testsuite/weak_unresolved_symbols_test.cc: New file.
gold/testsuite/weak_unresolved_symbols_test.cc [new file with mode: 0644]