[Bug ld/23350] multiple prevailing defs for unused variable in lto mode

[hjl.tools at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=23350

--- Comment #7 from H.J. Lu <hjl.tools at gmail dot com> ---
get_symbols has

    if (!blhe)
        {
          /* The plugin is called to claim symbols in an archive element
             from plugin_object_p.  But those symbols aren't needed to
             create output.  They are defined and referenced only within
             IR.  */

But there is no way to tell LTO plugin to drop this symbol.

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