[Bug ld/28814] New: Support creating empty ELF symbol versions without VER_FLG_WEAK

[fweimer at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=28814

            Bug ID: 28814
           Summary: Support creating empty ELF symbol versions without
                    VER_FLG_WEAK
           Product: binutils
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: ld
          Assignee: unassigned at sourceware dot org
          Reporter: fweimer at redhat dot com
                CC: hjl.tools at gmail dot com
  Target Milestone: ---

In some sense this is opposite of bug 24718.

If an object defines a sequence of versions A, B, C, and does not associate any
symbol versions with (say) version B, BFD ld sets VER_FLG_WEAK on that symbol
version. It would be nice if this could be avoided. In glibc, to suppress the
flag, we currently create an otherwise-unused placeholder symbol. If we had a
way to avoid the flag, we would not need to do that.

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