From:	ryot AT bigfoot DOT com (George Ryot)
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: make/linking trouble
Message-ID:	<382a4e50.5106703@news.clara.net>
References:	<80592o$mnp AT hermes DOT acs DOT unt DOT edu>
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Date:	Mon, 08 Nov 1999 23:08:51 GMT
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"Morpheus" <hall AT silo DOT cs DOT unt DOT edu> wrote:

> I am getting very frustrated, as I am out of practice with my C++. I'm
> having particular trouble with the make utility. I THINK I'm doing this
> right. I have four modules, one with a class (IniUtils.h & .cpp), two with
> functions (StringUtils.h & .cpp and FileUtils.h & .cpp), and one with a
> "main" function to test them (IniTest.cpp). I've included my Makefile. I
> won't include the other files (I will post them as replies). But I will say
> that IniUtils requires StringUtils and FileUtils, StringUtils requires
> FileUtils, FileUtils requires StringUtils, and IniTest is only testing
> IniUtils (its IniFile class), so it only includes IniUtils.h.
> 
> *Makefile*
> 
> OBJS = IniTest.o IniUtils.o StringUtils.o FileUtils.o

IniTest.o is the first file listed, so this line

> $(EXES): $(OBJS)

causes IniTest.cpp to be the first file compiled:

> IniTest.o: IniTest.cpp IniUtils.h StringUtils.h FileUtils.h
>  $(CXX) $(CXXFLAGS) -c IniTest.cpp $(ERR)

I can see nothing obviously wrong with the makefile.

> Here's the error message from gcc.log:
> 
> IniTest.o: In function `main':
> IniTest.cpp:1: undefined reference to `IniFile::IniFile(char *)'
> IniTest.cpp:2: undefined reference to `IniFile::setActiveSection(char *)'
> IniTest.cpp:3: undefined reference to `IniFile::getValue(char *)'

That suggests that for some reason the header IniUtils.h is not being
included in IniTest.cpp, but you do have that file #included.  I would
forget the makefile for the time being and run gxx directly, or maybe
re-order OBJS to see if there are other similar problems.

Check that windows is not duping you into thinking that you are
including a file you are not.  FWIW I find it easier using all lower
case for everything.  Use dir to see the filename DOS is using.

You could try removing the header guards, and/or put a #error at the
top of IniUtils.h to prove that it is being read.
-- 
george

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