From:	kvogt AT UVic DOT CA
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Newsgroups:	comp.os.msdos.djgpp
Date:	Thu, 23 Aug 2001 18:46:32 -0700 (PDT)
To:	Eli Zaretskii <eliz AT is DOT elta DOT co DOT il>
cc:	<djgpp AT delorie DOT com>
Subject:	Re: gcc 'undefined reference' error
In-Reply-To:	<8011-Thu23Aug2001120553+0300-eliz@is.elta.co.il>
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Commenting out the two environment variables you mentioned fixed the
problem. Thanks for your help, Eli. :)

Kevin

On Thu, 23 Aug 2001, Eli Zaretskii wrote:

> > From: <kvogt AT UVic DOT CA>
> > Newsgroups: comp.os.msdos.djgpp
> > Date: Thu, 23 Aug 2001 00:17:21 -0700
> >
> > I am trying to use
> > a program called PCTimer, which uses the following functions that my
> > linker has trouble with. Some of these are declared in pc.h; I should have
> > used one of them, rather than ScreenMode(), in my example.
> >
> > __dpmi_simulate_real_mode_interrupt
> > __dpmi_simulate_real_mode_procedure_iret
> > _go32_dpmi_allocate_real_mode_callback_iret
> >
> > [more functions omitted]
>
> This is a sign of an installation problem, since all these functions
> are in DJGPP's libc.a.
>
> > I also posted my verbose gcc output at the same location. I named it
> > 'gcc.txt'.
>
> And this was the key to unlock the problem: you have RSXNTDJ
> installed, and thus the compiler was using RSXNT libraries, not DJGPP
> libraries.  I'm guessing that you have C_INCLUDE_PATH and LIBRARY_PATH
> variables set in the environment which point to the RSXNTDJ
> directories.  These variables force the compiler and linker to use
> RSXNT headers and libraries, and that's why you have unresolved
> references.
>
> Here's the relevant line from the output produced by "gcc -v":
>
> > c:/djgpp/bin/ld.exe -o test.exe c:/djgpp/lib/crt0w32.o -Lc:/djgpp/lib/st -Lc:/djgpp/lib -Lc:/djgpp/lib/gcc-lib/djgpp/2.953 -Lc:/djgpp/bin -Lc:/djgpp/lib/st -Lc:/djgpp/lib c:/djgpp/tmp\ccezkpvS.o c:/djgpp/tmp\ccYLEN9l.o -lpc -lalias -lgcc -lc -lmain -lc_app -lc -lgcc -lemx -lkrn32 -lusr32 -lgdi32 -lemx2 -Trsxnt.djl
>
> Note the telltale "-Trsxnt.djl" at the end of this line, as well as
> libraries such as -lgdi32 and -lkrn32 -- these are Windows libraries.
>
> Solution: remove the above-mentioned environment variables, and DJGPP
> should start working again.
>
> > I just installed DJGPP today, using the following zip files:
> > alleg312.zip
> > bnu2112b.zip
> > djdev203.zip
> > em2005b.zip
> > em2005li.zip
> > faq230b.zip
> > fil40s.zip
> > gcc2953b.zip
> > gpp2953b.zip
> > grx243s.zip
> > mak3791b.zip
> > rh1478b.zip
> > rsxdj151.zip
> > txi40b.zip
>
> These are all okay.  The Allegro library is a bit old, though; you
> might wish to look for a newer version if you intend to work seriously
> with Allegro.  But Allegro has nothing to do with your current
> inability to link programs such as PCTimer.
>

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