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Linker garbage collection should not collect unreferenced symbols if they are externally visible and export-dynamic is on


Hi,

   There is a bug in gold. Linker garbage collection should not
collect unreferenced symbols if they are externally visible and
export-dynamic is on. They do right now. The following patch fixes it.

	* symtab.h (Symbol_table::gc_mark_symbol_for_shlib): Rename to
	gc_mark_symbol.
	* symtab.cc (Symbol_table::gc_mark_symbol_for_shlib): Rename to
	gc_mark_symbol.
	Change to just keep the section associated with symbol.
	(Symbol_table::add_from_relobj): Mark symbols as not garbage when
	they are externally visible and --export-dynamic is turned on.
	(Symbol_table::gc_mark_dyn_syms): Call gc_mark_symbol.

Comments?

Thanks,
-Sri.

Attachment: gold_patch.txt
Description: Text document


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