Re: Have you ever seen a compiler error message like this?

[Scott Christley]

At 12:01 AM 11/6/97 -0600, Paul Johnson wrote:

> ModelSwarm.o: In function `_c_ModelSwarm__createBegin_':
>/swarm/swarmapps/majority03/ModelSwarm.m:18: undefined reference to
>`__objc_class_name_Setter'
>make: *** [Voter] Error 1

This is not a compiler error, in actuality it is a linker error.  Your code
is compiling fine; the problem is that the linker cannot find the object
code for the Setter class.

When you reference a class

Setter *aSetter;

Then there must be an @implementation of Setter which gets compiled and
linked in with your program.

Essentially the linker is saying "hey you say there is this Setter class but
I cannot find its implementation!"

Check to see that your Setter.m file is correct, is being compiled, and is
being linked with the rest of your program.

Scott


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