Duncan Gibson wrote: >>>>> g++ hello.cxx [...] -lfltk_images -lfltk >>>>> produces: >>>>> /tmp/ccBlyRgP.o: In function `main': >>>>> hello.cxx:(.text+0x44): undefined reference to >>>>> `fltk::Window::Window(int, ... > >>> fltk-1.3 and fltk-2 are completely different beasts, so don't confuse >>> them or think that they are interchangable. [...] >>> To discover the compiler and linker flags that are appropriate for >>> your installation, use 'fltk-config' for fltk-1.x, and 'fltk2-config' >>> for fltk-2. > >> Well, thanks Duncan, but that's quit obvious or I wouldn't have got >> to the link stage at all. I installed fltk 2, tried that example and >> got the problem above. I uninstalled it, installed 1.3 tried the 1.3 >> example with the same problems. > > My apologies, but it's not obvious to some people who post here. > > Some people also come unstuck by having multiple versions of fltk-1.1.x > and/or fltk-1.3.x installed where include files and libraries might not > match or where they built and installed them with different options. > > Final suggestion from me: > Does fltk-config* --ldflags return non-standard -L options that you > will need to give to the linker so that it can find the libraries?
... and two more from me: Is there any chance that your installed libs (you wrote that you "installed" them, i.e. did not compile them yourself?) might have been compiled with a different compiler version? If so, try compiling them yourself and see what happens. It is also not obvious if you tried to link with gcc/g++ before you tried to use ld. I don't know what happens "under the hood", but generally it is not recommended to link with ld, but instead use the compiler frontend to drive the linker, e.g. g++ -o hello hello.cxx `fltk(2)-config --cxxflags --ldflags` should work. If this doesn't work, please post the exact error messages. You can even use the generated fltk(2)-config in the fltk source directory without installing it for testing. That's what I do often to compile and link with different fltk (test/development) versions. Albrecht _______________________________________________ fltk mailing list [email protected] http://lists.easysw.com/mailman/listinfo/fltk
