cmake - undefined symbols error in c++, while the header file exists -


sorry if i'm asking dumb question, i've been stuck on 1 quite time now. so, i'm trying compile program using cmake, calls functions videosource.cpp file, corresponding videosource.h file.

the compiler finds file, when linking makes error:

undefined symbols: "videosourcefactory::construct()", referenced from: _main in main.cpp.o

however, in videosource.h, function defined, as:

class videosourcefactory { public: videosourcefactory(); ...}

does have idea can causing kind of errors happen??

thanks in advance!

videosource.cpp file must added files list, main.cpp.


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