Help me please!!!

OpenGL OpenGL: Basic Coding
1

i am writing my first opengl program in visual c++ 6.0 using Molofee’s tutorials

but now this happen…--------------------Configuration: 1 - Win32 Debug--------------------
Linking…
1.obj : error LNK2001: unresolved external symbol _gluPerspective@32
1.obj : error LNK2001: unresolved external symbol __imp__glLoadIdentity@0
1.obj : error LNK2001: unresolved external symbol __imp__glMatrixMode@4
1.obj : error LNK2001: unresolved external symbol __imp__glViewport@16
1.obj : error LNK2001: unresolved external symbol __imp__glHint@8
1.obj : error LNK2001: unresolved external symbol __imp__glDepthFunc@4
1.obj : error LNK2001: unresolved external symbol __imp__glEnable@4
1.obj : error LNK2001: unresolved external symbol __imp__glClearDepth@8
1.obj : error LNK2001: unresolved external symbol __imp__glClearColor@16
1.obj : error LNK2001: unresolved external symbol __imp__glShadeModel@4
LIBCD.lib(crt0.obj) : error LNK2001: unresolved external symbol _main
Debug/1.exe : fatal error LNK1120: 11 unresolved externals
Error executing link.exe.

1.exe - 12 error(s), 0 warning(s)

2

perhaps you add opengl32.lib and glut32.lib to Projects->preferences->linker (i don’t know if these menu-points are correct cause i only have VC6++ German version…)

or simply press alt+f7

3

I have got the same problem with Builder Borland 5 !! What can this be ?

4

You need to include the libraries in your project. Not sure specifically how to do that for Builder, but Mcbastian’s description of how to do that for VC++ 6.0 works for the US version as well.

5

If you are using glut, you shouldn’t need to include the libraries in your project as they are already included in glut.h.

taken from glut.h :
#pragma comment (lib, “winmm.lib”) /* link with Windows MultiMedia lib /
#pragma comment (lib, “opengl32.lib”) / link with Microsoft OpenGL lib /
#pragma comment (lib, “glu32.lib”) / link with OpenGL Utility lib /
#pragma comment (lib, “glut32.lib”) / link with Win32 GLUT lib */

As you can see you don’t really need to include the libraries in your project the way it is meant to be done in CBuilder or vc++. You can simply add the following line to your code

#pragma comment (lib, “mylib.lib”)

thus even if you don’t use glut simply add the following lines to your program :

#pragma comment (lib, “opengl32.lib”)
#pragma comment (lib, “glu32.lib”)

Ah, yes one other thing… for you umount. If you are using Borland CBuilder 5 you might need to use the implib utility to make new .lib files as CBuilder doesn’t use the same format of .lib as vc++. I needed to do that with CBuilder 4 for glut32.lib.
Implib can be found in the bin directory of your CBuilder installation and the command line is
implib <path>\glut32.lib <path>\glut32.dll

Moz