[llvm] [llvm-objcopy] Add llvm-objcopy option --set-visibility-sym (PR #80872)

[James Henderson via llvm-commits]

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@@ -290,6 +290,9 @@ static Error updateAndRemoveSymbols(const CommonConfig &Config,
     return Error::success();
 
   Obj.SymbolTable->updateSymbols([&](Symbol &Sym) {
+    if (ELFConfig.SymbolsToSetVisibility.matches(Sym.Name) &&
+        Sym.getShndx() != SHN_UNDEF)
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jh7370 wrote:

I don't think you have any testing showing that SHN_UNDEF symbols aren't modified?

https://github.com/llvm/llvm-project/pull/80872