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If a header contains 'extern template', then the template should be provided somewhere by an explicit instantiation, so it is not necessary to generate a copy. Worse, this can lead to an unresolved symbol, because the codegen's object file will not actually contain functions from such a template because of the GVA_AvailableExternally, but the object file for the explicit instantiation will not contain them either because it will be blocked by the information provided by the module. Differential Revision: https://reviews.llvm.org/D69779
13 lines
245 B
C++
13 lines
245 B
C++
// header for codegen-extern-template.cpp
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#ifndef CODEGEN_EXTERN_TEMPLATE_H
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#define CODEGEN_EXTERN_TEMPLATE_H
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template <typename T>
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inline T foo() { return 10; }
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extern template int foo<int>();
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inline int bar() { return foo<int>(); }
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#endif
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