Re: [Mingw-users] Error: undefined reference to Newbie::C++ in MinGW-Users

[Oscar F. <of...@wa...>]

"Devin Carless" <dcc...@ya...> writes:

> Hello all,
> 
>   Of recent, as a way of doing something useful with my time, I've begun to
> teach myself C++.  (Those of you wincing already need read no further.)
> The only book available is eight years out of date and has no index to speak
> of.

Be careful with what you use to learn. There are very bad C++ books
out there that can harm you for a long time. You can take a look to
the ACCU book reviews to know some qualified opinion about your book:

http://www.accu.org/bookreviews/public/index.htm

There is a decent book published in electronic format:

http://www.mindview.net/Books

Look for "Thinking in C++".

[snip]

> I have the feeling they're symptoms of a deeper problem, one
> that I'm at a loss to diagnose or fix.

You could try to make a small code snippet that should compile and
that shows your problem, post here and expect than somebody explains
why it doesn't work.

[snip]
>   A virtual deconstructor caused an undefined reference error.. until
> the declaration was moved from the bottom of the public: section of the
> class to third, right after the constructors.  What's more, this fix got rid
> of another undefined reference error in the same class.  I've also had
> similar problems with the inline statement and a typedef.

You are facing the typical problems every newbie has.

>   As you can see, I've managed to get rid of these annoying errors, at the
> cost of making my code less readable.

Well, it would be better if you undestand why this changes are
necessary, don't you think? You have a lot of ngs and mailing lists
where you can ask.

[snip]
> (Anything inside the linker > may as well be voodoo to me: 'tlink -o
> -v blackcockerel.o'.)

tlink? Hmmmm... shouldn't it be 'ld' or 'gcc'?
 
>   I've trawled the Net back and forth looking for any sort of explanation.
> It's probably not the compiler; the errors persist when I compile as Cygwin
> (an option Dev-C++ gives you.)  All the problems other people seem to be
> having are with linking to libraries.  My problem is linking to functions
> the compiler recognizes and has passed on as valid to the linker.

Well, without seeing a _complete_ and _minimal_ example (less than 50
lines, please) one can't help much.

[snip]

-- 
Oscar