[PATCH] D61117: Fix Bug 41353 - unique symbols printed as D instead of u

[Mike Pozulp via Phabricator via llvm-commits]

mmpozulp added a comment.

In D61117#1507698 <https://reviews.llvm.org/D61117#1507698>, @MaskRay wrote:

> BTW, I think `STB_GNU_UNIQUE` is a misfeature (no clear specification, only (complex) implementation is in glibc, interaction with STB_WEAK/STB_GLOBAL is unclear..)..  this feature will highlight the problem :)


@MaskRay, it sounds like you know a lot more than I do about this feature :). Do you know what purpose is served by "unique" global symbols? `man nm` shows

>   "u" The symbol is a unique global symbol.  This is a GNU extension to the
>       standard set of ELF symbol bindings.  For such a symbol the dynamic
>       linker will make sure that in the entire process there is just one
>       symbol with this name and type in use.

but without an example I don't understand why this feature is useful. If you, @MaskRay, don't know of an example, then @rupprecht, who asked for this feature <https://bugs.llvm.org/show_bug.cgi?id=41353>, or other knowledgeable people like @grimar and @jhenderson may know of one. Thanks :)


Repository:
  rL LLVM

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  https://reviews.llvm.org/D61117/new/

https://reviews.llvm.org/D61117