undefined reference

[fafner]

I know there are several other posts about this issue, but none of the ones I can find have been helpful.

I'm trying for the first time to compile a fairly large codebase. Everything compiles fine except for two classes. This is an example of the compiler-error I get:

/tmp/ccZfRwyv.o: In function `GeometricObject::GeometricObject()':
GeometricObject.cpp:(.text+0x34): undefined reference to `RGBColor::RGBColor(float, float, float)'

The GeometricObject.h includes RGBColor.h, and GeometricObject has an instance of RGBColor, but none of the rest of the code references RGBColor. The RGBColor constructor mentioned in the error is defined:

RGBColor(const float nr, const float ng, const float nb);

and declared:

RGBColor::RGBColor(const float nr, const float ng, const float nb) : r(nr), g(ng), b(nb) {
}

As far as I can see, there is nothing wrong with either implementation or definition. Any clues?

Peace

[Bazzy]

If you have multiple source files, make sure you are linking every object file you need into the final binary

[fafner]

Yep, all the files are there. When I first encountered the issue, I realized that I HAD forgotten to include RGBColor when compiling, but now I have fixed that and the issue still remains.

[Bazzy]

what about linking?

[fafner]

I use: g++ foo1.cpp foo2.cpp foo3.cpp -o foo -lm

[Disch]

No IDE?

[fafner]

No, I'm only using gedit and g++ in terminal. I'm currently using a netbook, so I need as much screen real-estate as possible for the actual code. I find all the IDEs I've tried to clutter up my screen:p If you have a suggestion for a good IDE for netbook usage, I'd be grateful:)

[fafner]

Ok, I moved RGBColor to the beginning of the list of files in the g++ command, and now it appears to work. Does that make sense?

[ne555]

Dunno. If that is really an issue, compile like

g++ *.cpp -c #just compile, don't link
g++ *.o -o program.bin