[llvm-dev] Undefined reference while linking with 3.8 and GCC5

[edA-qa mort-ora-y via llvm-dev]

I think my ENABLE_RTTI flag might not be correct/enough. I'm trying
again with LLVM_REQUIRES_RTTI.


On 05/06/16 18:43, edA-qa mort-ora-y via llvm-dev wrote:
> I'm getting these errors while linking my project now (being migrated
> from 3.3 to 3.8, now using GCC5):
>
>     build/libleaf_ir_llvm.so: undefined reference to `typeinfo for
> llvm::Value'
>     build/libleaf_ir_llvm.so: undefined reference to `typeinfo for
> llvm::CmpInst'
>     build/libleaf_ir_llvm.so: undefined reference to `typeinfo for
> llvm::Instruction'
>     build/libleaf_ir_llvm.so: undefined reference to `typeinfo for
> llvm::Function'
>     build/libleaf_ir_llvm.so: undefined reference to `typeinfo for
> llvm::UnaryInstruction'
>
> I'm presuming my linking is basically correct otherwise I'd get hundreds
> of undefined references.  Am I perhaps using a constructor that isn't
> being provided anymore?
>
> I built LLVM with this command:
>
>     cmake .. -DENABLE_EH=ON -DENABLE_RTTI=ON -DLLVM_ENABLE_CXX1Y=ON
> -DLLVM_LINK_LLVM_DYLIB=ON -DLLVM_ENABLE_FFI=ON
> -DLLVM_ENABLE_ASSERTIONS=ON -DLLVM_BUILD_DOCS=ON
> -DLLVM_ENABLE_DOXYGEN=ON -DLLVM_OPTIMIZED_TABLEGEN=ON
> -DCMAKE_INSTALL_PREFIX="/opt/llvm/install"
>
> And I link to the installed LLVM-3-8.so
>


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