> > > > Hi, I am using Xcode 4 and trying to set up FLTK 1.3.0 to run Bjarne > > Stroustrup's Chapter 12 FLTK Demo at the end of the chapter. I keep > > getting the following error when compiling, and have no idea where to go. > > I have an idea it might have to do with the linker flags, but I don't know > > what flag to add and where... > > > > Here's the error: > > > > > > > > > Undefined symbols for architecture x86_64: > > > "Fl_JPEG_Image::Fl_JPEG_Image(char const*)", referenced from: > > > Graph_lib::Image::Image(Point, String, > > Graph_lib::Suffix::Encoding) in Graph.o > > > "Fl_GIF_Image::Fl_GIF_Image(char const*)", referenced from: > > > Graph_lib::Image::Image(Point, String, > > Graph_lib::Suffix::Encoding) in Graph.o > > > ld: symbol(s) not found for architecture x86_64 > > > clang: error: linker command failed with exit code 1 (use -v to see > > invocation) > > > It appears to be telling you that the objects you are linking do not have t= > he required symbols to link as x86_64. Is it possible that some (or all?) o= > f your code is linked as i386 only and that's what's throwing the errors? > > Also; I see you are using clang; did you try with gcc too, just in case the= > re's some weirdness there? > > I'm not sure if anyone here actively uses Xc4 (I know I don't!) so it may b= > e less thouroughly tested - though I think Matt was doing stuff with Xc4... > > > > > I don't know how to check what code is linked as i386, but I'll try to figure > that out. Also, how should I change clang to gcc? Thanks for trying to help, > I understand many aren't familiar with Xcode 4.
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