https://llvm.org/bugs/show_bug.cgi?id=31903
Bug ID: 31903
Summary: Clang-CL error on inheritance from template supplied
internal type
Product: clang
Version: trunk
Hardware: PC
OS: Windows NT
Status: NEW
Severity: normal
Priority: P
Component: C++
Assignee: unassignedclangb...@nondot.org
Reporter: steve...@gmail.com
CC: dgre...@apple.com, llvm-bugs@lists.llvm.org
Classification: Unclassified
MS CL.exe differs in behavior from Clang-CL
$ type ..\templ_inst.cpp
namespace {
class Internal {};
}
class __declspec(dllexport) NotTempl : public Internal
{
};
template<typename T>
class __declspec(dllexport) Templ : public T
{
};
int main()
{
NotTempl nt;
Templ<Internal> ta;
return 0;
}
$ C:\dev\src\llvm\build\releaseprefix\msbuild-bin\CL.exe ..\templ_inst.cpp
..\templ_inst.cpp(11,29): error: 'Templ<(anonymous namespace)::Internal>' must
have external linkage when declared 'dllexport'
class __declspec(dllexport) Templ : public T
^
..\templ_inst.cpp(18,18): note: in instantiation of template class
'Templ<(anonymous namespace)::Internal>' requested here
Templ<Internal> ta;
^
1 error generated.
$ CL.exe ..\templ_inst.cpp
/out:templ_inst.exe
templ_inst.obj
Creating library templ_inst.lib and object templ_inst.exp
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