compilation error #36

Linking amule
amule-ClientCreditsList.o: In function `CryptoPP::Unflushable<CryptoPP::Filter>::Flush(bool, int, bool)':
/usr/include/cryptopp/simple.h:61: undefined reference to `CryptoPP::DEFAULT_CHANNEL'
amule-ClientCreditsList.o: In function `CryptoPP::SourceTemplate<CryptoPP::FileStore>::Pump2(unsigned long long&, bool)':
/usr/include/cryptopp/filters.h:763: undefined reference to `CryptoPP::DEFAULT_CHANNEL'
amule-ClientCreditsList.o: In function `CryptoPP::SourceTemplate<CryptoPP::FileStore>::PumpMessages2(unsigned int&, bool)':
/usr/include/cryptopp/filters.h:765: undefined reference to `CryptoPP::DEFAULT_CHANNEL'
amule-ClientCreditsList.o: In function `CryptoPP::SourceTemplate<CryptoPP::FileStore>::PumpAll2(bool)':
/usr/include/cryptopp/filters.h:767: undefined reference to `CryptoPP::DEFAULT_CHANNEL'
amule-ClientCreditsList.o: In function `CryptoPP::SourceTemplate<CryptoPP::StringStore>::Pump2(unsigned long long&, bool)':
/usr/include/cryptopp/filters.h:763: undefined reference to `CryptoPP::DEFAULT_CHANNEL'
amule-ClientCreditsList.o:/usr/include/cryptopp/filters.h:765: more undefined references to `CryptoPP::DEFAULT_CHANNEL' follow
clang: error: linker command failed with exit code 1 (use -v to see invocation)