[Bug ld/20070] LLVM gold plugin(LLVMgold.so) report Unexpected resolution failure on ld when LTO, but pass on gold

[hjl.tools at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=20070

--- Comment #11 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to Steven Shi from comment #10)
> LLVM guys say "LTO is linker specific, clang is only forwarding the option
> to the linker here." see below discussion about "How to debug if LTO
> generate wrong code?":
> http://lists.llvm.org/pipermail/cfe-dev/2016-May/048906.html
> 
> So it looks, if I compile my llvm bitcode without any optimization level
> (-O0) and pass them to linker to finish the LTO build, all the optimizations
> are done only by the linker, not llvm.
> 
> Is it right?

LTO stands for link-time optimization.  -On is passed back to llvm LTO
plugin.

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