[help needed] problem with setting up C::B for using GLUT

User forums > Using Code::Blocks

(1/1)

Riker1990:
Recently I downloaded Code::Blocks 8.02 and yesterday I've decided to learn something about OpenGL. I got a link to a tutorial from my friend so I just went for it.
First thing I decided to do was to compile the example program from that tutorial and run it .Here's it's code (original comments only in polish, sorry):

--- Code: ---/*
(c) Janusz Ganczarski (Power)
http://www.januszg.hg.pl
JanuszG@enter.net.pl
*/

#include <GL/glut.h>
#include <stdlib.h>

// funkcja generująca scenę 3D

void Display ()
{
// kolor tła - zawartość bufora koloru
glClearColor (1.0,1.0,1.0,1.0);

// czyszczenie bufora koloru
glClear (GL_COLOR_BUFFER_BIT);

// kolor kwadratu
glColor3f (1.0,0.0,0.0);

// początek definicji wielokąta
glBegin (GL_POLYGON);

// kolejne wierzchołki wielokąta
glVertex3f (0.0, 0.0, 0.0);
glVertex3f (0.0, 1.0, 0.0);
glVertex3f (1.0, 1.0, 0.0);
glVertex3f (1.0, 0.0, 0.0);

// koniec definicji prymitywu
glEnd ();

// skierowanie poleceń do wykonania
glFlush ();

// zamiana buforów koloru
glutSwapBuffers();
}

// zmiana wielkości okna

void Reshape (int width, int height)
{
// generowanie sceny 3D
Display ();
}

// stałe do obsługi menu podręcznego

enum
{
EXIT // wyjście
};

// obsługa menu podręcznego

void Menu (int value)
{
switch (value)
{
// wyjście
case EXIT:
exit (0);
}
}

int main (int argc, char *argv[])
{
// inicjalizacja biblioteki GLUT
glutInit (&argc,argv);

// inicjalizacja bufora ramki
glutInitDisplayMode (GLUT_DOUBLE | GLUT_RGB);

// rozmiary głównego okna programu
glutInitWindowSize (400,400);

// utworzenie głównego okna programu
glutCreateWindow ("Kwadrat 1");

// dołączenie funkcji generującej scenę 3D
glutDisplayFunc (Display);

// dołączenie funkcji wywoływanej przy zmianie rozmiaru okna
glutReshapeFunc (Reshape);

// utworzenie menu podręcznego
glutCreateMenu (Menu);

// dodadnie pozycji do menu podręcznego
#ifdef WIN32

glutAddMenuEntry ("Wyjście",EXIT);
#else

glutAddMenuEntry ("Wyjscie",EXIT);
#endif

// określenie przycisku myszki obsługującej menu podręczne
glutAttachMenu (GLUT_RIGHT_BUTTON);

// wprowadzenie programu do obsługi pętli komunikatów
glutMainLoop ();
return 0;
}

--- End code ---
I downloaded GLUT from OpenGL page and extracted both .dll's to windows/system and windows/system32 (wasn't sure where it's supposed to go), extracted .h to MinGW/include/GL and .lib's to MinGW/lib and also Extracted all 5 files to a separate folder. Then I created new GLUT project in C::B, and I was asked about the folder to which GLUT was unpacked - I responded with MinGW's folder. I pasted the example program's source into newly created main.cpp, then I linked both glut.lib and glut32.lib to the project (in project\build options\linker settings) and tried to compile and received an error (and some warnings about ignoring pragma content as well)

--- Code: ---D:\IT\CodeBlocks\MinGW\include\GL\glut.h|43|error: redeclaration of C++ built-in type `short'
--- End code ---
in header file in lines:

--- Code: ---# ifndef _WCHAR_T_DEFINED
typedef unsigned short wchar_t;
# define _WCHAR_T_DEFINED
--- End code ---
Uncle Google told me that stdio.h should be included before glut.h so I tried that one and got:

--- Code: ---D:\IT\CodeBlocks\MinGW\include\GL\glut.h|48|warning: ignoring #pragma comment |
D:\IT\CodeBlocks\MinGW\include\GL\glut.h|49|warning: ignoring #pragma comment |
D:\IT\CodeBlocks\MinGW\include\GL\glut.h|50|warning: ignoring #pragma comment |
D:\IT\CodeBlocks\MinGW\include\GL\glut.h|51|warning: ignoring #pragma comment |
D:\IT\CodeBlocks\MinGW\include\GL\glut.h|53|warning: ignoring #pragma warning |
D:\IT\CodeBlocks\MinGW\include\GL\glut.h|54|warning: ignoring #pragma warning |
obj\Debug\main.o||In function `_Z7Displayv':|
C:\Documents and Settings\User\Moje dokumenty\fun\3dfun3\main.cpp|15|undefined reference to `__imp__glClearColor'|
C:\Documents and Settings\User\Moje dokumenty\fun\3dfun3\main.cpp|18|undefined reference to `__imp__glClear'|
C:\Documents and Settings\User\Moje dokumenty\fun\3dfun3\main.cpp|21|undefined reference to `__imp__glColor3f'|
C:\Documents and Settings\User\Moje dokumenty\fun\3dfun3\main.cpp|24|undefined reference to `__imp__glBegin'|
C:\Documents and Settings\User\Moje dokumenty\fun\3dfun3\main.cpp|27|undefined reference to `__imp__glVertex3f|
C:\Documents and Settings\User\Moje dokumenty\fun\3dfun3\main.cpp|28|undefined reference to `__imp__glVertex3f'|
C:\Documents and Settings\User\Moje dokumenty\fun\3dfun3\main.cpp|29|undefined reference to `__imp__glVertex3f'|
C:\Documents and Settings\User\Moje dokumenty\fun\3dfun3\main.cpp|30|undefined reference to `__imp__glVertex3f'|
C:\Documents and Settings\User\Moje dokumenty\fun\3dfun3\main.cpp|33|undefined reference to `__imp__glEnd'|
C:\Documents and Settings\User\Moje dokumenty\fun\3dfun3\main.cpp|36|undefined reference to `__imp__glFlush'|
C:\Documents and Settings\User\Moje dokumenty\fun\3dfun3\main.cpp|39|undefined reference to `_glutSwapBuffers'|
obj\Debug\main.o||In function `main':|
C:\Documents and Settings\User\Moje dokumenty\fun\3dfun3\main.cpp|72|undefined reference to `_glutInit'|
C:\Documents and Settings\User\Moje dokumenty\fun\3dfun3\main.cpp|75|undefined reference to `_glutInitDisplayMode'|
C:\Documents and Settings\User\Moje dokumenty\fun\3dfun3\main.cpp|78|undefined reference to `_glutInitWindowSize'|
C:\Documents and Settings\User\Moje dokumenty\fun\3dfun3\main.cpp|81|undefined reference to `_glutCreateWindow'|
C:\Documents and Settings\User\Moje dokumenty\fun\3dfun3\main.cpp|84|undefined reference to `_glutDisplayFunc'|
C:\Documents and Settings\User\Moje dokumenty\fun\3dfun3\main.cpp|87|undefined reference to `_glutReshapeFunc'|
C:\Documents and Settings\User\Moje dokumenty\fun\3dfun3\main.cpp|90|undefined reference to `_glutCreateMenu'|
C:\Documents and Settings\User\Moje dokumenty\fun\3dfun3\main.cpp|95|undefined reference to `_glutAddMenuEntry'|
C:\Documents and Settings\User\Moje dokumenty\fun\3dfun3\main.cpp|102|undefined reference to `_glutAttachMenu'|
C:\Documents and Settings\User\Moje dokumenty\fun\3dfun3\main.cpp|105|undefined reference to `_glutMainLoop|
||=== Build finished: 21 errors, 6 warnings ===|

--- End code ---
I created new GLUT project, linked both .lib's and tried to compile the code that is in every new GLUT project by default, included stdlib.h before glut.h and tried to compile. This time I got 50 "undefined reference" errors, more followed but weren't displayed.

If even the default code in an example program doesn't work then I guess it's not compiler/OpenGL issue, I guess I screwed something up (with GLUT). Any idea how to make these two programs work/what have I done wrong?

I described all the things I've done as detailed as possible. I'm using on WinXP sp2.

MortenMacFly:

--- Quote from: Riker1990 on April 17, 2009, 07:08:08 pm ---Any idea how to make these two programs work/what have I done wrong?

--- End quote ---
In addition to the libs mentioned you'll need to link against the OpenGL32 lib, too. Notice that also the order of the libs´matters as they depend on each other. Why don't you let the wizard create yourself a GLUT project and inspect it's settings?

Riker1990:
The only opengl lib I have that was already installed with CB is libopengl32.a. I tried including it but it didn't work. I'll download OpenGL32.lib and try it tomorrow.

When I create a new OpenGL project there are no libraries linked (at least none are mentioned in linker settings), just like in a new GLUT project. I'm thinking of reinstalling CB, maybe that would help, but anyway I'll try it tomorrow.

As for the order of libs linked I'd say OpenGL32.lib must be linked first, is that correct?

Update:

There was no OpenGL32.lib in my C::B installation, so I "borrowed" it from VS. After including everything works as it should.

I still don't get why new OpenGL project (with default source code) doesn't need that library (I can't see it on linker's "linked libraries" list). Well, at least it works now, so thx for help:)

MortenMacFly:

--- Quote from: Riker1990 on April 18, 2009, 12:22:02 am ---I still don't get why new OpenGL project (with default source code) doesn't need that library (I can't see it on linker's "linked libraries" list).

--- End quote ---
Notice that a project does have (at least one) target. You can setup libraries at 3 places:
1.) The compiler settings (it makes no sense there btw...)
2.) At project level
3.) At target level
I am *sure* that on one of the last two you'll find the libs because you *need* to link against them. You can also enable the full command line log (see my sig) to check the linker command. This will also tell you the right order then.

ollydbg:
See my post about linking to GLUT.

http://forums.codeblocks.org/index.php/topic,10419.msg71718.html#msg71718

Navigation

[0] Message Index

Go to full version