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X-Authentication-Warning: slinky.cs.nyu.edu: pechtcha owned process doing -bs
Date: Mon, 20 Jan 2003 12:09:41 -0500 (EST)
From: Igor Pechtchanski <pechtcha AT cs DOT nyu DOT edu>
Reply-To: cygwin AT cygwin DOT com
To: =?iso-8859-1?Q?Mikael_=C5sberg?= <mikas493 AT student DOT liu DOT se>
cc: cygwin AT cygwin DOT com
Subject: RE: Building opengl applications
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On Mon, 20 Jan 2003, [iso-8859-1] Mikael Åsberg wrote:

> ----- Original Message -----
> From: "Igor Pechtchanski" <pechtcha AT cs DOT nyu DOT edu>
> To: "Mikael Åsberg" <mikas493 AT student DOT liu DOT se>
> Cc: <cygwin AT cygwin DOT com>
> Sent: Monday, January 20, 2003 5:45 PM
> Subject: Re: Building opengl applications
>
>
> > On Mon, 20 Jan 2003, [iso-8859-1] Mikael Åsberg wrote:
> >
> > > Hello, I am trying to build a simple OpenGL program (an example taken from
> > > the famous "Red Book"). However, during the build process the following
> > > error messages are displayed:
> > >
> > > /cygdrive/c/DOCUME~1/ADMINI~1/LOCALS~1/Temp/ccK0lHn2.o(.text+0xe):test.c: undefined reference to `glEnableClientState AT 4'
> > > /cygdrive/c/DOCUME~1/ADMINI~1/LOCALS~1/Temp/ccK0lHn2.o(.text+0x1d):test.c: undefined reference to `glEnableClientState AT 4'
> > > /cygdrive/c/DOCUME~1/ADMINI~1/LOCALS~1/Temp/ccK0lHn2.o(.text+0x44):test.c: undefined reference to `glVertexPointer AT 16'
> > > /cygdrive/c/DOCUME~1/ADMINI~1/LOCALS~1/Temp/ccK0lHn2.o(.text+0x6b):test.c: undefined reference to `glColorPointer AT 16'
> > > /cygdrive/c/DOCUME~1/ADMINI~1/LOCALS~1/Temp/ccK0lHn2.o(.text+0x92):test.c: undefined reference to `glInterleavedArrays AT 12'
> > >
> > > Actually, there is more, but each error is an undefined reference so it
> > > seems gcc cannot find
> > > the libraries. I did install them, though.
> > > Building with -glut32 -lglu32 -lopengl32
> > >
> > > What am I doing wrong?
> > >
> > > Hope you can help me =)
> > >
> > > // Mikael
> > >
> > > --
> > > Bug reporting:         http://cygwin.com/bugs.html
> > > Documentation:         http://cygwin.com/docs.html
> > > FAQ:                   http://cygwin.com/faq/
> >
> > Mikael,
> >
> > Please note the last 3 lines above.  I'm sure at least some of the
> > relevant information is contained there.  If not, at least they contain a
> > way of reporting your problem with the maximum of useful information
> > (especially the first link of the three).  Without knowing the exact
> > command line you gave to gcc and the packages you have installed, there is
> > no way to provide useful input.  Please peruse the instructions at the
> > above links on how to report your problem properly.
> > Igor
> >
> >
> Apart from the base install, I have installed the opengl library and gcc and
> the packages it requires (cygwin, ash, binutils, w32api, mingw-runtime,
> linintl2, gcc-mingw). I already gave the build command:
> gcc -glut32 -lglu32 -lopengl32 -o test test.c
>
> Any other info needed? This is cygwin 1.3.18, packages were downloaded a
> few weeks ago.

Mikael,

You still didn't read the bug reporting guidelines at
<http://cygwin.com/bugs.html>.  For the future, please read them and
follow them when posting.

Now that you gave a *full* build command (which you most assuredly did not
before), you have provided enough information to deduce the nature of your
problem.  The order of arguments to gcc does matter.  The library
containing a particular symbol should follow the object trying to use that
symbol in the argument list.  Try

gcc -o test test.c -glut32 -lglu32 -lopengl32

You may also need to juggle the -l arguments to make this work.
	Igor
-- 
				http://cs.nyu.edu/~pechtcha/
      |\      _,,,---,,_		pechtcha AT cs DOT nyu DOT edu
ZZZzz /,`.-'`'    -.  ;-;;,_		igor AT watson DOT ibm DOT com
     |,4-  ) )-,_. ,\ (  `'-'		Igor Pechtchanski
    '---''(_/--'  `-'\_) fL	a.k.a JaguaR-R-R-r-r-r-.-.-.  Meow!

Oh, boy, virtual memory! Now I'm gonna make myself a really *big* RAMdisk!
  -- /usr/games/fortune


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