[Newbie] Opengl Extension linker problem

[Vinn]

hi ,

i've got a problem compiling my code:

when i try to compile my code the linker gives me this error:

[Linker error] undefined reference to glGenFramebuffersEXT' [Linker error] undefined reference toglBindFramebufferEXT'
[Linker error] undefined reference to `glFramebufferTexture2DEXT'

i'm using SDL , OpenGl and DevIL libs:

my linking options are:
-lmingw32 -lopengl32 -lglu32 -lSDLmain -lSDL -ldevil -lilu -lilut

Thanks in advance for any kind of help.

P.S. my VGA supports that almost all ARB, EXT and NV estension.

[Vinn]

really thanks BiT,you save my day!!!

i've my code now compile and works ^^

i've also found this C example form an opengl article:
http://www.opengl.org/resources/features/OGLextensions/pointburst.c

hope that is useful for someone else!

thanks again to all of your help !!

[Anonymous]

No! Post the Compile Log. That will accurately tell us what your errors are and what compiler/linker options you have set. Its a simple copy & paste so it is easier to provide full and accurate information than it is to do what you did!

Clifford

[Vinn]

thanks for the reply cifford

Compile Log:

Compilatore: Default compiler
Building Makefile: "C:#######\Desktop\Test\Makefile.win"
Esecuzione di make...
C:\Dev-Cpp\Bin\mingw32-make -f "C:#######\Desktop\Test\Makefile.win" all
C:\Dev-Cpp\Bin\gcc.exe -DDEBUG -c main.c -o main.o -I"C:/Dev-Cpp/include" -DGNUWIN32 -DWIN32 -DNDEBUG -D_WINDOWS -D_MBCS -g3
C:\Dev-Cpp\Bin\gcc.exe -DDEBUG main.o objLoader.o -o "test.exe" -L"C:/Dev-Cpp/lib" -lmingw32 -lopengl32 -lglu32 -lSDLmain -lSDL -ldevil -lilu -lilut -g3

main.o(.text+0x8fb): In function SDL_main': C:/Users/nthrack/Desktop/Test/main.c:252: undefined reference toglGenFramebuffersEXT'
main.o(.text+0x90e):C:/Users/nthrack/Desktop/Test/main.c:253: undefined reference to glBindFramebufferEXT' main.o(.text+0x9b4):C:/Users/nthrack/Desktop/Test/main.c:259: undefined reference toglFramebufferTexture2DEXT'

C:\Dev-Cpp\Bin\mingw32-make: *** [test.exe] Error 1

[Osito]

What's with the ####### in your path?

[Vinn]

i don't know Osito,

the log always gives me that problem in the path.

anyway, i reinstalled dev-c++ and the problem in the log seems to be soved, but the linker keep generating errors :(

Compilatore: Default compiler
Building Makefile: "C:\Users\nthrack\Desktop\Test\Makefile.win"
Esecuzione di make...
C:\Dev-Cpp\Bin\mingw32-make -f "C:\Users\nthrack\Desktop\Test\Makefile.win" all
C:\Dev-Cpp\Bin\gcc.exe -DDEBUG -c main.c -o main.o -I"C:/Dev-Cpp/include" -DGNUWIN32 -DWIN32 -DNDEBUG -D_WINDOWS -D_MBCS -g3

C:\Dev-Cpp\Bin\gcc.exe -DDEBUG main.o objLoader.o -o "test.exe" -L"C:/Dev-Cpp/lib" -lmingw32 -lopengl32 -lglu32 -lSDLmain -lSDL -ldevil -lilu -lilut -g3

main.o(.text+0x8fb): In function SDL_main': C:/Users/nthrack/Desktop/Test/main.c:252: undefined reference toglGenFramebuffersEXT'
main.o(.text+0x90e):C:/Users/nthrack/Desktop/Test/main.c:253: undefined reference to glBindFramebufferEXT' main.o(.text+0x9b4):C:/Users/nthrack/Desktop/Test/main.c:259: undefined reference toglFramebufferTexture2DEXT'

C:\Dev-Cpp\Bin\mingw32-make: *** [test.exe] Error 1

Esecuzione terminata

[Vinn]

update:

I've tried to compile my code under linux, and the app compile successfully.

any idea ?

[Wayne Keen]

Out of curiosity - where did the libraries in question come from?

Wayne

[Vinn]

just opengl extension , i've used the lib and the headers from dev-c++(mingw) installation package.
the other libs are SDL and DevIl.

[Wayne Keen]

I did not ask what libraries you were using, I asked where you got them from.

For example, OpenGL (Glut) is NOT part of the default setup for Dev. Some
headers are present, but the libraries are not. You must install Glut
seperately, either as a Dev-Pack (which can be gotten from more than one placeO,
or, as my getting stated with Glut guide recommends, another site / download
process.

Please tell me for each of the libraries, where you got them, as most do
not come with default Dev-C++

Wayne

[Vinn]

for the DevIL i followed a guide on http://devpaks.org/details.php?devpak=99
the SDL is from a Dev-Pack in the standard repository.

[Wayne Keen]

And Glut?

Wayne

[Vinn]

i don't use Glut

[BiT]

so you are using glext.h? which does not come with the default install of Dev and the library files probably do not have the symbols for those function calls.

may want to look at glew.sourceforge.net

I could be way off base so I would ask C or W or Soma to verify that.

[Vinn]

thanks all for your replies ^^

yes BiT i'm using an updated version of glext.h for opengl.org site.

i've already tried to use glew libs but the result seems the same :

Building Makefile: "C:\Users\nthrack\Desktop\Test\Makefile.win"
Esecuzione di make...
C:\Dev-Cpp\Bin\mingw32-make -f "C:\Users\nthrack\Desktop\Test\Makefile.win" all
C:\Dev-Cpp\Bin\gcc.exe -DDEBUG -c main.c -o main.o -I"C:/Dev-Cpp/include" -DGNUWIN32 -DWIN32 -DNDEBUG -D_WINDOWS -D_MBCS -g3

C:\Dev-Cpp\Bin\gcc.exe -DDEBUG main.o objLoader.o -o "test.exe" -L"C:/Dev-Cpp/lib" -lmingw32 -lglu32 -lopengl32 -lglut32 -lglew32 -ldevil -lilu -lilut -lSDLmain -lSDL -lglew32 -g3

main.o(.text+0x8ee): In function SDL_main': C:/Users/nthrack/Desktop/Test/main.c:253: undefined reference to_imp_glewGenFramebuffersEXT'
main.o(.text+0x909):C:/Users/nthrack/Desktop/Test/main.c:254: undefined reference to _imp____glewBindFramebufferEXT' main.o(.text+0x99f):C:/Users/nthrack/Desktop/Test/main.c:261: undefined reference to_imp_glewFramebufferTexture2DEXT'

C:\Dev-Cpp\Bin\mingw32-make: *** [test.exe] Error 1

thanks again to all for your help ^^

[BiT]

take a look at these

http://sourceforge.net/forum/message.php?msg_id=2713847

http://www.opengl.org/resources/features/OGLextensions/