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From: "arizvi" <ahmadwaris AT hotmail DOT com>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: Problem with make: undefined reference to vtable
Date: 24 Jun 2005 12:21:59 -0700
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To: djgpp AT delorie DOT com
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Reply-To: djgpp AT delorie DOT com

> > Instead of:
>
> > ./test_view.o:: test_view.cpp infoDialog.cpp
>
> > I had:
>
> > ./test_view.o:: infoDialog.cpp test_view.cpp
>
> Those are both equally wrong.  This rule can only make sense if you
> #include one .cpp file into the other.  Don't do that.  Compile each
> separately, and leave it to the linker to combine them.
>

I dont understand how both rules are wrong. Afaik, the top rule states
that test_view.o depends on test_view.cpp and infoDialog.cpp. So if
infoDialog.cpp changes, test_view.cpp will be recompiled. What you are
suggesting (let me know if I am wrong) is that the rules should be
simply

./test_view.o:: test_view.cpp
./infoDialog.o:: infoDialog.cpp,

and then I lose the dependency I am looking for. Or are you implying
that if I include infoDialog.h in test_view.cpp, I will get the
dependency automatically?

I have certainly no wish to 'include' one cpp file in another. I am
only want to link them together. The rule
'./test_view.o:: test_view.cpp infoDialog.cpp' is only a dependency.
Please let me know if I am wrong.

-Ahmad