Hi,
I'm stuck on a runtime error "undefined symbol: _ZTIN5eckit9ExceptionE" with a
shared library libMagPlus.so. There was no error while building it, the error
just was raised at runtime when Python module loading it.
Symbol '_ZTIN5eckit9ExceptionE' was demangled into a readable symbol 'typeinfo
for eckit::Exception'
Checked with nm, the undefined symbol '_ZTIN5eckit9ExceptionE' is from a static
library libOdb.a, which was static linked into libMagPlus.so, like this
nm -Cl libOdb.a | grep -i "eckit::Exception"
<code>
U eckit::Exception::Exception(std::string const&,
eckit::CodeLocation const&)
/opt/src/OdbAPI-0.10.2-Source/eckit/src/eckit/exception/Exceptions.h:84
U eckit::Exception::~Exception()
/opt/src/OdbAPI-0.10.2-Source/eckit/src/eckit/exception/Exceptions.h:108
0000000000000000 W eckit::Exception::retryOnClient() const
/opt/src/OdbAPI-0.10.2-Source/eckit/src/eckit/exception/Exceptions.h:48
0000000000000000 W eckit::Exception::retryOnServer() const
/opt/src/OdbAPI-0.10.2-Source/eckit/src/eckit/exception/Exceptions.h:47
0000000000000000 W eckit::Exception::terminateApplication() const
/opt/src/OdbAPI-0.10.2-Source/eckit/src/eckit/exception/Exceptions.h:49
0000000000000000 W eckit::Exception::what() const
/opt/src/OdbAPI-0.10.2-Source/eckit/src/eckit/exception/Exceptions.h:46
U eckit::Exception::print(std::ostream&) const
U typeinfo for eckit::Exception
</code>
I also tried to unpack all object files from libOdb.a and relink libMagPlus.so
with all of them with option '-fvisibility=default -rdynamic', like this
<code>
ar x libOdb.a ( ./Odb )
/usr/bin/g++ -fvisibility=default -rdynamic -fPIC -pipe -O2 -g \
-Wl,--disable-new-dtags -shared \
-Wl,-soname,libMagPlus.so -o ../lib/libMagPlus.so \
... ... \
./Odb/*.o \
... ...
</code>
But still got these undefined symbols
<code>
U eckit::Exception::~Exception()
/opt/src/OdbAPI-0.10.2-Source/eckit/src/eckit/exception/Exceptions.h:108
U eckit::Exception::print(std::ostream&) const
U typeinfo for eckit::Exception
<code>
Here are the the header that defines eckit::Exception class.
<code>
Exceptions.h
/// @brief General purpose exception
/// Derive other exceptions from this class and implement then in the class
that throws them.
class Exception : public std::exception {
public: // methods
/// Constructor with message
Exception(const std::string& what, const CodeLocation& location =
CodeLocation() );
/// Destructor
/// @throws nothing
~Exception() throw();
virtual const char *what() const throw() { return what_.c_str(); }
virtual bool retryOnServer() const { return false; }
virtual bool retryOnClient() const { return false; }
virtual bool terminateApplication() const { return false; }
static bool throwing();
static void exceptionStack(std::ostream&,bool callStack = false);
const std::string& callStack() const { return callStack_; }
protected: // methods
void reason(const std::string&);
Exception();
virtual void print(std::ostream&) const;
private: // members
std::string what_; ///< description
std::string callStack_; ///< call stack
SavedStatus save_; ///< saved monitor status to recover after
destruction
Exception* next_;
CodeLocation location_; ///< where exception was first thrown
friend std::ostream& operator<<(std::ostream& s,const Exception& p)
{
p.print(s);
return s;
}
};
</code>
I knew little about C++, and have no idea how to get this fixed. Wondering if
needs to touch Exceptions.h and how to touch it ?
Anybody can help ?
Appreciating your time
Regards
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