gold patch committed: Fix --exclude-libs with undefined symbol

[Ian Lance Taylor]

The support for --exclude-libs did not correctly handle an undefined
symbol in the excluded library.  It gave such a symbol hidden
visibility, which makes no sense.  --exclude-libs should only apply to
symbols actually being defined in the library being excluded.  I
committed this patch to fix it, along with a test case.

Ian


2009-12-30  Ian Lance Taylor  <iant@google.com>

	PR 10916
	* symtab.cc (Symbol_table::add_from_relobj): When not exporting
	symbols from this object, don't change the visibility of an
	undefined symbol.
	* testsuite/exclude_libs_test_1.c (lib1_ref): New function.


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