Hey German, yes, it should be listed with ldd. You could add -Wl,-y,<any_of_your_symbols>, e.g. -Wl,-y,_ZN3ftr10Aplicacion11dibujarTodoER9SDL_Event and check the output, if the linker searches your library. A sample output could look like: andi@roma:~/Programming/c++$ g++ main.o -Wl,-y,_ZdaPv -o main main.o: reference to operator delete[](void*) /usr/lib/gcc/i486-linux-gnu/4.3.2/libstdc++.so: definition of operator delete[](void*) I hope that helps to at least further narrow the problem, if still present. Best regards, Andi Germán Diago wrote: > I noticed now that using ldd does not list libmylib as a dependency of > the executable. I think it should, shouldn't it? > > > 2009/4/11 Germán Diago <germandiago@xxxxxxxxx>: > >> Hello. I'm having problems with what it seemed to work before. I'm >> under ubuntu 9.04, gcc .4.3.3 compiler. >> >> I have a project in which I build a shared library. >> The shared library is later used in an executable. >> >> When I try to run the executable, once compiled, I get a strange error: >> >> It does not find some symbols from my shared library. I checked the >> library with the program nm. >> There are no undefined (relevant) symbols for my shared library there. >> >> However, in my executable, the following is shown with nm -u (I just >> copy here what it's relevant): >> >> U _ZN3ftr10Aplicacion11dibujarTodoER9SDL_Event >> U _ZN3ftr10Aplicacion11inicializarEv >> U _ZN3ftr10Aplicacion12addDibujableERKN5boost8functionIFvR9SDL_EventESaIvEEENS_15PrioridadDibujoE >> U _ZN3ftr10Aplicacion17refrescarPantallaEv >> U _ZN3ftr10Aplicacion8addTareaEPFvR9SDL_EventE >> U _ZN3ftr10Aplicacion8ejecutarEv >> U _ZN3ftr10AplicacionD1Ev >> U _ZN3ftr12MonitorDatos7dibujarER9SDL_Event >> U _ZN3ftr12MonitorDatosC1Ev >> U _ZN3ftr12MonitorDatosD1Ev >> U _ZN3ftr18ParseadorEscenario7parsearERKSs >> U _ZN3ftr18ParseadorEscenarioC1ERNS_9EscenarioE >> U _ZN3ftr18ParseadorEscenarioD1Ev >> U _ZN3ftr18ParseadorPersonaje7parsearERKSs >> U _ZN3ftr18ParseadorPersonajeC1ERNS_9PersonajeE >> U _ZN3ftr18ParseadorPersonajeD1Ev >> U _ZN3ftr9Escenario11inicializarEv >> U _ZN3ftr9Escenario7dibujarER9SDL_Event >> U _ZN3ftr9EscenarioC1Ev >> U _ZN3ftr9EscenarioD1Ev >> U _ZNK3ftr9Personaje7getPosXEv >> U _ZNK3ftr9Personaje7getPosYEv >> >> >> These symbols are from the library I compiled, and they appear as >> undefined in the executable, so when I try to execute >> my program, it fails. >> >> If I compile a Static library everything is ok, but I need to compile >> a shared library for other purposes. >> >> >> This compilation command is used to build files in my shared library: >> >> g++ -o build/linux2/release/libmylib/Utility.os -c -O3 -fPIC >> -D_GNU_SOURCE=1 -D_REENTRANT -DDATA_DIR=\"/usr/share/mylib/\" >> -DTIXML_USE_STL=YES -I/usr/include/python2.6 -I/usr/include/SDL >> -Ibuild/linux2/release/libmylib -Ilibmylib -Itinyxml >> libfollowtherabbit/Utility.cpp >> >> This is the link gcc command: >> >> g++ -o build/linux2/release/libmylib/libmylib.so -shared (all object >> files here and other libraries here) >> >> This is used for my executable: >> >> g++ -o build/linux2/release/src/myprogram >> build/linux2/release/src/myprogram.o -Lbuild/linux2/release/libmylib >> -Llibmylib -L/usr/lib -lmylib >> build/linux2/release/tinyxml/libtinyxml.a -lSDL_ttf -lSDL_mixer -lSDL >> >> Thanks for your help >> >> > >
