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| author | Sriraman Tallam <tmsriram@google.com> | 2015-04-23 13:56:40 -0700 |
|---|---|---|
| committer | Sriraman Tallam <tmsriram@google.com> | 2015-04-23 13:56:40 -0700 |
| commit | a100d66fb42044153dc0e93c96d7944dab0cc674 (patch) | |
| tree | 7ab7ef6c6911cde3a440fed3c688e6b533d973f4 /gold/symtab.cc | |
| parent | 65eb8c79be0c71f9b52d14563c0817fc5ca33c0d (diff) | |
| download | binutils-gdb-a100d66fb42044153dc0e93c96d7944dab0cc674.tar.gz | |
Add option --weak-unresolved-symbols to treat unresolved symbols as weak ref.
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.
Diffstat (limited to 'gold/symtab.cc')
| -rw-r--r-- | gold/symtab.cc | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/gold/symtab.cc b/gold/symtab.cc index c1972210d67..d2ed3520da0 100644 --- a/gold/symtab.cc +++ b/gold/symtab.cc @@ -2920,6 +2920,13 @@ Symbol_table::sized_write_globals(const Stringpool* sympool, typename elfcpp::Elf_types<size>::Elf_Addr dynsym_value = sym_value; elfcpp::STB binding = sym->binding(); + // If --weak-unresolved-symbols is set, change binding of unresolved + // global symbols to STB_WEAK. + if (parameters->options().weak_unresolved_symbols() + && binding == elfcpp::STB_GLOBAL + && sym->is_undefined()) + binding = elfcpp::STB_WEAK; + // If --no-gnu-unique is set, change STB_GNU_UNIQUE to STB_GLOBAL. if (binding == elfcpp::STB_GNU_UNIQUE && !parameters->options().gnu_unique()) |