http://llvm.org/bugs/show_bug.cgi?id=12714
Bug #: 12714
Summary: undefined references to class template methods when
visibility is used
Product: clang
Version: trunk
Platform: PC
OS/Version: Linux
Status: NEW
Severity: normal
Priority: P
Component: C++
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected], [email protected]
Classification: Unclassified
Created attachment 8480
--> http://llvm.org/bugs/attachment.cgi?id=8480
sample project for the bug
I don't know if this is really a bug in clang or not.
But the attached samples compiles fine with gcc (4.6.1)
I have a class template "Manager" from which the class "IntManager" inherits.
this class is compiled into a lib named lib1.
// class template
template <class AType> class Manager {
public:
virtual bool Init();
virtual bool DeInit();
protected:
Manager();
virtual ~Manager();
protected:
AType *m_pElement;
};
// inherited class which gets compiled int lib1
class IntManager : public Manager<int> {
public:
LIB1_API_EXPORT IntManager();
LIB1_API_EXPORT virtual ~IntManager();
};
Another class "AdvIntManager" (compiled into another shared lib called lib2)
inherits from "IntManager"
class AdvIntManager : public IntManager {
public:
LIB2_API_EXPORT AdvIntManager();
LIB2_API_EXPORT virtual ~AdvIntManager();
};
whenn lib2 gets compiled with following additional LDFLAG: -Wl,--no-undefined
the linker generates following error:
AdvIntManager.o:(.data.rel.ro+0x10): undefined reference to
`Manager<int>::Init()'
AdvIntManager.o:(.data.rel.ro+0x18): undefined reference to
`Manager<int>::DeInit()'
As i already sad i don't know if this is a bug in clang in conjunction with the
visibility feature or an non standard usage.
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