[PATCH] D52810: [llvm-nm] Print an explicit "no symbols" message when an object file has no symbols

[James Henderson via Phabricator via llvm-commits]

jhenderson added a comment.

In D52810#1818209 <https://reviews.llvm.org/D52810#1818209>, @sbc100 wrote:

> I've got a fix llvm-nm that I will upload, but funnily enough it doesn't actually solve the wasm issue.   The reason is that with ELF we always generate at least one local symbols (the STT_FILE symbols) so no unstripped object will ever report "no symbols".  However compiling the empty file on wasm does generate file with a symbol table of size zero..  which mean the fix I'm proposing doesn't actually fix our issue.


FWIW, if you create an ELF object from an assembly file, the STT_FILE symbol will only be created if you have a .file directive.

An ELF symbol table with only the null symbol at index 0 present does result in GNU nm producing "no symbols" for me, so it's not a missing/size 0 symbol table that is exactly important, just an effectively empty table.


Repository:
  rL LLVM

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https://reviews.llvm.org/D52810