Hahnfeld added inline comments.
================
Comment at: lib/Driver/ToolChains.cpp:4704
+ GetRuntimeLibType(Args) == ToolChain::RLT_CompilerRT)
+ CmdArgs.push_back("-lunwind");
+}
----------------
mgorny wrote:
> Hahnfeld wrote:
> > As just written in D25008: This will probably result in problems if a
> > system default `libunwind.so.8` is installed...
> I think this is the correct behavior in this case. Clang should work with
> whichever unwinder implementation is available, and if you want to change
> that, change the `libunwind.so` symlink.
>
> However, I don't really think it's a good idea to have both unwinder
> libraries installed alongside, especially that they are sharing the same name.
No, we can't: The nongnu libunwind is used by other system libraries that need
and are tested against this version.
It's certainly not a good idea, but it's reality in many distros. Most of them
don't ship LLVM's libunwind.
https://reviews.llvm.org/D25402
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