[llvm-bugs] [Bug 31695] New: Export attribute on inline template method not ignored

[via llvm-bugs]

https://llvm.org/bugs/show_bug.cgi?id=31695

            Bug ID: 31695
           Summary: Export attribute on inline template method not ignored
           Product: clang
           Version: trunk
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: normal
          Priority: P
         Component: Driver
          Assignee: unassignedclangbugs at nondot.org
          Reporter: steveire at gmail.com
                CC: llvm-bugs at lists.llvm.org
    Classification: Unclassified

Given a header

    #ifdef BUILDING_LIB
    #define EXPORT __declspec(dllexport)
    #else
    #define EXPORT __declspec(dllimport)
    #endif

    namespace MyNS {
        EXPORT void func();

        template<int size = 3>
        EXPORT inline int someFunc(int input = size);
    }

    template<int size>
    int MyNS::someFunc(int input)
    {
        return input * 2;
    }

and trivial source file:

    #include "export-inline.h"

    namespace MyNS {
    void func()
    {

    }
    }

and consumer:


    #include "export-inline.h"

    int main()
    {
        MyNS::func();
        int sf = MyNS::someFunc(43);
        return 0;
    }

and buildsystem:

    add_library(sh SHARED
        export-inline.cpp
    )
    target_compile_definitions(sh PRIVATE BUILDING_LIB)

    add_executable(shconsumer export-consumer.cpp)
    target_link_libraries(shconsumer sh)

clang-cl fails to ignore the export attribute and the link fails.

    unresolved external symbol "__declspec(dllimport) int __cdecl
MyNS::someFunc<3>(int)" (__imp_??$someFunc@$02 at MyNS@@YAHH at Z) referenced in
function main

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