nenajdena referencia v dynamickej kniznici

Ak pouzivas gcc tak
http://www.delorie.com/djgpp/doc/ug/compiling/gcc. html

The -l options are used to add libraries to your program. Note that order is important! You should always list libraries after all your objects. If you don't, gcc might not realize that it needs them until it's too late. The -l option is a shortcut for linking a library, because you can always just list the library on the command line (like "gcc hello.o mylib.a"). The benefit of the -l option is that you don't need to know where the library is. This is used for the standard libraries, and in fact, gcc will automatically add -lc to whatever you type in order to get the standard C library (libc.a). Note that with the -l option, you only need to specify part of the library name. gcc assumes that the library name starts with "lib" and ends in ".a", so -lfoo would refer to libfoo.a and would be found wherever the standard libraries are kept.

ak je ta kniznica v nedefaultnom adresari tak potrebujes nastavit aj cesty na kniznice
http://www.network-theory.co.uk/docs/gccintro/gcci ntro_21.html

When additional libraries are installed in other directories it is necessary to extend the search paths, in order for the libraries to be found. The compiler options -I and -L add new directories to the beginning of the include path and library search path respectively.

Zdravim.
Trosku neskoro ale skor sa mi nedalo, no uz mi to ide. Pouzil som zly prekladac. Kniznica bola zostavena cez g++ a aplikaciu, kde som chcel kniznicu pouzit som kompiloval cez cc a ten akceptoval iba volania, ktore boli deklarovane s klauzulou extern "C" a ja v kniznici mam umiestnenu aj triedu nie len funkcie.

Nahodou nevies co znamena extern "C" a jeho vyuzitie, alebo knihu kde sa o tom dozviem viac? Zatial som sa to nepotreboval.

Daj si do google slova "calling convention"

Alebo si daj do google slova "mix C and C++", alebo citaj napr. http://msdn.microsoft.com/en-US/library/0603949d%2 8v=VS.80%29.aspx, alebo si najdi calling convention pre C++ a C (a trebars aj pascal, ptz napr. cele WinAPI ma pascal calling convention a neni to jedno).
Rozdiel je v tom co prekladac musi urobit pred a po volani funkcie, neni to jedno. Z toho dovodu pri linkovani je rozlisovana konvencia, a funkciu s nespravnou konvenciou to vobec nenajde (pri linkovani nazov funkcie obsahuje aj dalsie potrebne informacie, takze linker nehlada len "test" ale vpodtste nieco ako "_test0IUGZFW" apod. prekladace si tam davaju aj potrebne informacie o tom jak je nutne tu fciu volat, ptz keby si volal tu fciu inac alebo s inym mnozstvom parametrov, tak by ti ten program na tom mieste dokonale skapal. Preto musis zadat aj tvojmu kompileru programu v programe spravnu konvenciu, s akou bola kompilovana kniznica.

Vdaka za pomoc. Vyzera ze je to, presne to co som potreboval odtial sa uz dalej odrazim, len som nevedel co presne hladat.