[gameprogrammer] Re: GL 2.0 on Xorg w/ ATI's proprietary drivers

Latimerius wrote: 
On Thu, May 11, 2006 at 02:03:02PM -0500, Bob Pendleton wrote:

On Wed, 2006-05-10 at 23:29 +0200, Latimerius wrote:
test.cpp: In function `int main()':
test.cpp:7: error: `glCreateProgram' undeclared (first use this function)
test.cpp:7: error: (Each undeclared identifier is reported only once for each function it appears in.)
Aren't those compiler errors, not link errors? It looks like the symbol
is not defined in gl.h or glext.h. I would go to /usr/include/GL and
grep to see if glCreateProgram is defined anywhere. If it isn't then I
would assume that I had an old version of the .h files and try to find
new ones. If glxinfo says you have 2.0 then you have 2.0.

I apologize, these *are* compiler, not linker errors. I pasted into my
message wrong output (from a previous compilation when test.cpp didn't
have all the required headers included) and failed to notice before I
sent it.
You should document yourself on the OpenGL extension mechanism. For the extensions, you have to retrieve these function pointers through some mechanism before you can use them (using one of the getprocadress calls like glXGetProcAddressARB or SDL_GL_GetProcAddress depending on what you use).

Stephane




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