Adding -lpthread to the compiler options, as Roy suggested solved the problem. Thank you very much. I do not understand how -pthread as linker option should solve the problem, as the parameter is unknown by g++. Did you perhaps mean -lpthread or did I add the parameter to the wrong command? I have to add it as linker flag, don't I?
On 5/21/08, Wei Dai <[EMAIL PROTECTED]> wrote: > I think you need to add "-pthread" as an option to the linker. > > -------------------------------------------------- > From: "Jojo" <[EMAIL PROTECTED]> > Sent: Tuesday, May 20, 2008 1:21 PM > To: "Crypto++ Users" <[EMAIL PROTECTED]> > Subject: Re: Compiling fails "undefined reference to `pthread_key_create'" > >> >> Oops sorry. >> >> I am trying to compile an app which uses libcrypto++ on my debian >> machine with gcc-4.2. >> I googled it and some guys were facing this problem with Eclipse but I >> am using KDevelop. >> http://article.gmane.org/gmane.comp.encryption.cryptopp/3685 >> http://groups.google.com/group/cryptopp-users/browse_thread/thread/e88323e6093f2c68?fwc=1 >> >> >> This is my minimum program: >> #include <iostream> >> #include <cstdlib> >> >> //cryptopp >> #include <md5.h> >> #include <hex.h> >> >> using namespace std; >> >> int main(int argc, char *argv[]) >> { >> cout << "Hello, world!" << endl; >> CryptoPP::MD5 hash; >> byte digest[ CryptoPP::MD5::DIGESTSIZE ]; >> std::string message = "abcdefghijklmnopqrstuvwxyz"; >> >> hash.Calculate#include <iostream> >> #include <cstdlib> >> #include <md5.h> >> #include <hex.h> >> using namespace std; >> >> int main(int argc, char *argv[]) >> { >> cout << "Hello, world!" << endl; >> CryptoPP::MD5 hash; >> byte digest[ CryptoPP::MD5::DIGESTSIZE ]; >> std::string message = "abcdefghijklmnopqrstuvwxyz"; >> >> hash.CalculateDigest( digest, (byte*) message.c_str(), >> message.length() ); >> >> CryptoPP::HexEncoder encoder; >> std::string output; >> encoder.Attach( new CryptoPP::StringSink( output ) ); >> encoder.Put( digest, sizeof(digest) ); >> encoder.MessageEnd(); >> >> std::cout << output << std::endl; >> return EXIT_SUCCESS; >> }Digest( digest, (byte*) message.c_str(), message.length() ); >> >> CryptoPP::HexEncoder encoder; >> std::string output; >> encoder.Attach( new CryptoPP::StringSink( output ) ); >> encoder.Put( digest, sizeof(digest) ); >> encoder.MessageEnd(); >> >> std::cout << output << std::endl; >> return EXIT_SUCCESS; >> } >> >> And this is the compiler output: >> cd '/home/user/cryptopptest/debug' && WANT_AUTOCONF_2_5="1" >> WANT_AUTOMAKE_1_6="1" LC_MESSAGES="C" LC_CTYPE="C" make -k >> make all-recursive >> Making all in src >> cd /home/user/cryptopptest && /bin/sh /home/user/cryptopptest/missing >> --run automake-1.10 --gnu src/Makefile >> cd .. && /bin/sh ./config.status src/Makefile depfiles >> config.status: creating src/Makefile >> config.status: executing depfiles commands >> g++ -DHAVE_CONFIG_H -I. -I/home/user/cryptopptest/src -I.. -I/usr/ >> include/cryptopp -O0 -g3 -MT cryptopptest.o -MD -MP -MF .deps/ >> cryptopptest.Tpo -c -o cryptopptest.o /home/user/cryptopptest/src/ >> cryptopptest.cpp >> In file included from /home/user/cryptopptest/src/cryptopptest.cpp:28: >> /usr/include/cryptopp/md5.h:25:2: warning: #warning "You may be using >> a weak algorithm that has been retained for backwards compatibility. >> Please '#define CRYPTOPP_ENABLE_NAMESPACE_WEAK 1' before including >> this .h file and prepend the class name with 'Weak::' to remove this >> warning." >> mv -f .deps/cryptopptest.Tpo .deps/cryptopptest.Po >> /bin/sh ../libtool --tag=CXX --mode=link g++ -O0 -g3 -o cryptopptest >> cryptopptest.o -lcryptopp >> g++ -O0 -g3 -o cryptopptest cryptopptest.o /usr/lib/libcrypto++.so >> /usr/lib/libcrypto++.so: undefined reference to `pthread_key_create' >> /usr/lib/libcrypto++.so: undefined reference to `pthread_getspecific' >> /usr/lib/libcrypto++.so: undefined reference to `pthread_key_delete' >> /usr/lib/libcrypto++.so: undefined reference to `pthread_setspecific' >> collect2: ld returned 1 exit status >> make[2]: Nothing to be done for `all-am'. >> make[2]: *** [cryptopptest] Error 1 >> make[2]: Target `all' not remade because of errors. >> make[1]: *** [all-recursive] Error 1 >> make: *** [all] Error 2 >> *** Exited with status: 2 *** >> >> >> > > --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the "Crypto++ Users" Google Group. To unsubscribe, send an email to [EMAIL PROTECTED] More information about Crypto++ and this group is available at http://www.cryptopp.com. -~----------~----~----~----~------~----~------~--~---
