problem with cygwin and GLUT on Vista

Tue Nov 4 18:45:00 GMT 2008

Michael McGuffin wrote:
> Hello,

Hello Michael,
> I'm using cygwin on Vista, 

Which version? 32-bit or 64-bit? with or without SP1?
> and have a problem running C++ code that contains calls to 
> GLUT routines. I've isolated the problem down to a very simple piece of code, and have 
> searched the web without being able to find help.
>> Note that I have packages opengl 1.1.0-8, freeglut 2.4.0-1, and gcc-g++ 3.4.4-3, 
> and "uname -a" outputs
> CYGWIN_NT-6.0 opticon-w 1.5.25(0.156/4/2) 2008年06月12日 19:34 i686 Cygwin

The standard (and more complete) way to provide that information is to attach the output of 
cygcheck -s to your problem report.
Please note that there is currently a conflict between the opengl package and the libglut-devel
package. If you have both, you will have to uninstall one of them. See:
http://cygwin.com/ml/cygwin/2008-11/msg00033.html
> Here's the problem, as best as I can isolate it. If I create a file called main.cpp containing 
> the following code:
>>> #include 
> #include 
>>> int main( int argc, char *argv[] ) {
> if ( argc> 100 ) {
> // glutInit( &argc, argv );
> glClear(GL_COLOR_BUFFER_BIT);
> }
> char str[100];
> printf("Enter a string:");
> scanf("%s",str);
> }
> and then I compile it with
>> g++ -o main main.cpp -lm -lglut32 -lglu32 -lopengl32

This is just plain C, not C++. Can you rename it main.c and recompile with:
gcc -o main main.cpp -lglut32 -lglu32 -lopengl32
This would clear-up if it is an issue with the stdc++ library.
> and then run the code without any arguments, it runs fine (note that the call to glClear() 
> never happens). However, if I uncomment the call to the glutInit() routine and comment the
> glClear() call,
>>> #include 
> #include 
>>> int main( int argc, char *argv[] ) {
> if ( argc> 100 ) {
> glutInit( &argc, argv );
> // glClear(GL_COLOR_BUFFER_BIT);
> }
> char str[100];
> printf("Enter a string:");
> scanf("%s",str);
> }
>> and compile the same way and run again without any arguments, Windows Vista gives me> an error message with the following details:
>>> Nom d'événement de problème: APPCRASH
> Nom de l'application: main.exe
> Version de l'application: 0.0.0.0
> Horodatage de l'application: 49103229
> Nom du module par défaut: ntdll.dll
> Version du module par défaut: 6.0.6001.18000
> Version du module par défaut: 4791a7a6
> Code de l'exception: c0000022
> Décalage de l'exception: 00009cac
> Version du système: 6.0.6001年2月1日.0.256.4
> Identificateur de paramètres régionaux: 3084
> etc.

Your example compiles and runs fine for me under XP SP3.
>> Note, again, that the call to glutInit() never happens. I suspect that simply linking with GLUT> somehow causes a problem, perhaps in some initialization of GLUT.
>
Then try one of the precompiled examples. What happens if you run
/usr/lib/glui-examples/example6 ?
> Note that I have tried running the main.exe as "administrator" (by right clicking on 
> main.exe and choosing the "run as administrator" option from the right-click menu), and I 
> get the same error message as when I try running main.exe from a cygwin shell prompt.
>> Any help would be appreciated, thanks.

I don't have a Vista machine with Cygwin installed right now. It might take a week before I 
get one. When I do, I will report back here.
Regards,
- André Bleau, Cygwin's volunteer OpenGL package maintainer.
Please direct any question or comment about the OpenGL package to cygwin at cygwin dot com
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