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Re: FW: question about cygwin OpenGL

On Sun, 10 Oct 2004, John P. Sutter wrote:

> Dear Cygwin users,
> I have downloaded the OpenGL library source code from cygwin onto my
> Windows XP computer and have been trying to set it up from the
> makefiles.

First off, why would you want to do this if there are binary packages
available for Cygwin?

> In directory glut-3.7.6, I first ran the mkmkfiles.image script provided
> with the package to generate the makefiles. Then I ran:
>                                       make clean
>                                       make includes
>                                       make depend
>                                       make
>                                       make install.
> The first three steps ran without error. But the fourth ("make")
> produced a long list of "undefined reference" error messages. A sample
> of the output is below.

Is there a "configure" script?  If so, did you run it first?

> I have checked the Web, and it seems that the
> undefined references are GLUT commands that should be defined elsewhere.
> However, I found no files on my system that define them, either in the
> OpenGL package I downloaded or anywhere else. I would appreciate any
> help you would be willing to give. It seems very basic, but I have
> checked various cygwin and OpenGL FAQ's without success.
> Yours truly,
> John P. Sutter
> SPring-8/JASRI
> 1 - 1 - 1 Kouto, Mikazuki-cho, Sayo-gun, Hyogo-ken 679-5198
> Tel: +81 791 58 0802 (x3105)
> Fax: +81 791 58 1816
> make[3]: Entering directory `/usr/src/opengl-1.1.0-7/glut-3.7.6/progs/demos/glutmech'
> gcc -O2 -fno-strength-reduce -Wall -Wpointer-arith    -I../../../include \
>   -I/usr/X11R6/include    -D__i386__ -DWIN32_LEAN_AND_MEAN -DX_LOCALE \
>   -D_X86_ -D__CYGWIN__ -D_XOPEN_SOURCE \
>   glutmech.o glutmech.c
> gcc   glutmech.o      -o glutmech
                   ^^^^             ^^^^
> glutmech.o(.text+0x8cf):glutmech.c: undefined reference to `_glRotatef'
> [snip 402 more "undefined reference" errors]
> collect2: ld returned 1 exit status
> make[3]: *** [glutmech] Error 1
> make[3]: Leaving directory `/usr/src/opengl-1.1.0-7/glut-3.7.6/progs/demos/glutmech'

This is missing the libraries altogether -- no wonder it doesn't find the
functions.  I'd guess the LDLIBS and LDFLAGS variables weren't defined
properly, probably due to you not having run "configure".  Or, maybe, you
just need to install the OpenGL libraries before you can compile client

Perhaps someone else can provide more hints.
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