[Bug binutils/16515] New: objcopy cannot weaken undefined symbols

[srk31 at srcf dot ucam.org]

http://sourceware.org/bugzilla/show_bug.cgi?id=16515

            Bug ID: 16515
           Summary: objcopy cannot weaken undefined symbols
           Product: binutils
           Version: 2.22
            Status: NEW
          Severity: normal
          Priority: P2
         Component: binutils
          Assignee: unassigned at sourceware dot org
          Reporter: srk31 at srcf dot ucam.org

Created attachment 7379
  --> http://sourceware.org/bugzilla/attachment.cgi?id=7379&action=edit
Patch to fix the bug

It is meaningful to weaken an undefined symbol. Currently objcopy silently
omits to do this when asked.

The attached patch fixes this for me.

(Note that by contrast, localizing and globalizing -- which are done
immediately after weakening in the code -- are, I think, only meaningful for
defined symbols. Perhaps this explains why the weakening code doesn't handle
the undefined case.)

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