[llvm-dev] Linking issue with clang/libc++

[Anton Korobeynikov via llvm-dev]

This symbol is a part of compiler runtime. In your case – you need to
link libgcc.

On Fri, Sep 3, 2021 at 9:01 PM Oleg Smolsky via llvm-dev
<llvm-dev at lists.llvm.org> wrote:
>
> Folks, I'm hitting a funky issue while building a Boost tool with Clang/libc++. Here is the compiler invocation:
>
> $ /opt/llvm-12/bin/clang++ -std=c++11 -O2 -stdlib=libc++ -Wno-mismatched-tags -O2 -s -DNDEBUG builtins.cpp class.cpp ........... pathunix.cpp -o b2
>
> And I get this:
>
> /opt/llvm-12/bin/../lib/libc++.so.1: undefined reference to `__divmodti4 at GCC_7.0.0'
>
> Clang itself was built with GCC-11... so I fail to understand where this symbol is coming from. Can someone shed some light on this please?
>
> Thanks in advance,
> Oleg.
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-- 
With best regards, Anton Korobeynikov
Department of Statistical Modelling, Saint Petersburg State University