[PATCH] gold: Implement --exclude-libs option

[=?big5?b?RG91ZyBLd2FuICjD9q62vHcp?= <dougkwan at google dot com>]

Hi,

    This patch implements an --exclude-libs option similar to the one
in gnu-ld.   The patch was tested using the gold testsuite, including
a new test including in the patch, on x86_64-unknown-linux-gnu.

-Doug

2009-05-19  Doug Kwan  <dougkwan@google.com>

        * archive.cc (Archive::get_elf_object_for_member): Set no_export
        flag of object.
        * archive.h (option.h, parameters.h): New includes.
        (Archive::Archive): Set no_explort_.
        (Archive::no_export): New method.
        (Archive::no_export_): New field.
        * object.h (Object::Object): Initialize no_export_ to false.
        (Object::no_export, Object::set_no_export): New methods.
        (Object::no_export_): New field.
        * options.cc (General_options::parse_exclude_libs): New method.
        (General_options::check_excluded_libs) Same.
        * options.h (exclude_libs): New option.
        (General_options::check_excluded_libs): New method declaration.
        (General_options::excluded_libs_): New field.
        * symtab.cc (Symbol_table::add_from_relobj): Hide symbols with
        default or protected visibility if an object has no-export flag set.
        testsuite/Makefile.am (check_PROGRAMS): Add exclude_lib_test.
        (check_SCRIPTS): Add exclude_libs_test.sh.
        (check_DATA): Add exclude_libs_test.syms.
        (MOSTLYCLEANFILES): Add exlude_libs_test.syms,
        libexclude_libs_test_1.a and libexclude_libs_test_2.a.
        (exclude_libs_test_SOURCES, exclude_libs_test_DEPENDENDICES,
        exclude_libs_test_LDFLAGS and exclude_libs_test_LDADD): Define.
        (exclude_libs_test.syms, libexclude_libs_test_1.a,
        libexclude_libs_test_2.a): New rules.
        * testsuite/Makefile.in: Regenerate.
        * testsuite/exclude_libs_test.c: New file.
        * testsuite/exclude_libs_test_1.c: Ditto.
        * testsuite/exclude_libs_test_2.c: Ditto.
        * testsuite/exclude_libs_test_2.sh: Ditto.

Attachment: patch.txt
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