RFC: Risc-V: Allow assembler to adjust relocs against symbols in mergeable sections

[Nick Clifton]

Hi Guys,

  Attached is a small patch which allows the Risc-V assembler to adjust
  fixups against symbols in mergeable sections.  Doing this results in
  relocations against the section's symbol instead of local symbols.

  In theory this would workaround the problem reported in PR 33723 and
  PR 33789, although I have not actually checked this.  In addition I do
  not know if the change would break something important for Risc-V.
  (Although the change does not introduce any new testsuite failures,
  but I am testing in a cross-compilation environment so native tests
  were not run).

  The patch does also help to reduce the size of the symbol table in
  object files as some local symbols can now be dropped.

  I am not going to apply the patch - I will leave that up to you to
  decide if it is suitable.  But I just thought that it might help...

Cheers
  Nick

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