[PATCH] D21890: [ELF] - Do not error out when version declaration not found when building executable.

[George Rimar via llvm-commits]

grimar created this revision.
grimar added reviewers: ruiu, rafael.
grimar added subscribers: emaste, grimar, llvm-commits.

When building executable usually version script is absent.
Before this patch error was shown in this case,
that is PR28359. Instead of error out patch allows
to create new version declaration in this case and use it.
It looks like gnu linkers do the same and this
behavior seems logical and correct to me.

http://reviews.llvm.org/D21890

Files:
  ELF/SymbolTable.cpp
  test/ELF/verdef-executable.s

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