Issue 183440
Summary link err: 3 api unfound while compile LTO module
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Reporter AlexBrowning
    [platform]: window10 MSVC 17
[errlog]: = note: lldELF.lib(LTO.obj) : error LNK2001: unresolved external symbol "public: virtual class llvm::Expected<class std::shared_ptr<class llvm::lto::InputFile> > __cdecl llvm::lto::DTLTO::addInput(class std::unique_ptr<class llvm::lto::InputFile,struct std::default_delete<class llvm::lto::InputFile> >)" (?addInput@DTLTO@lto@llvm@@UEAA?AV?$Expected@V?$shared_ptr@VInputFile@lto@llvm@@@std@@@3@V?$unique_ptr@VInputFile@lto@llvm@@U?$default_delete@VInputFile@lto@llvm@@@std@@@std@@@Z)␍
          lldELF.lib(LTO.obj) : error LNK2001: unresolved external symbol "protected: virtual class llvm::Error __cdecl llvm::lto::DTLTO::serializeInputsForDistribution(void)" (?serializeInputsForDistribution@DTLTO@lto@llvm@@MEAA?AVError@3@XZ)␍
          lldELF.lib(LTO.obj) : error LNK2001: unresolved external symbol "protected: virtual void __cdecl llvm::lto::DTLTO::cleanup(void)" (?cleanup@DTLTO@lto@llvm@@MEAAXXZ)␍

It seems CmakeFiles in LTO module is lack of DTLTO dependence.
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