[llvm-dev] ThinLTO with Linux+ELF+Gold -- incorrectly dropping weak definitions.

[David Callahan via llvm-dev]

I am tracking a problem with ThinLTO on Linux using gold and elf files where there is a disconnect between gold’s treatment of comdat groups and ThinLTO’s decisions about which weak references to convert to available externally.  The net result is a definition is lost and a relocation entry is not handled.

My status is summarized: https://bugs.llvm.org/show_bug.cgi?id=32980

Anyone familiar with this space and have guidance? Either on how to avoid the problem, or a patch to correct it?

Thanks
--david


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