Re: [openvrml-develop] Link failure in building OpenVRML-0.16.1 on Mac OS X ppc

[Philip L. <ph...@ed...>]

On 09/12/2006, at 3:44 AM, Braden McDaniel wrote:

> On Fri, 2006-12-08 at 12:39 +0100, Thomas Engelmeier wrote:
>> On 08.12.2006, at 03:27, Braden McDaniel wrote:
>>
>>> Well, I spoke with a Mac user on IRC some weeks ago and the glu.h
>>> he was
>>> able to locate on his system did not exhibit this breakage. I don't
>>> know
>>> exactly which glu.h he found. (I thought it was the one associated
>>> with
>>> the OpenGL framework, but maybe not.) As I understand it, you can  
>>> get
>>> one from the normal Apple OpenGL framework, one from Apple's X11,  
>>> and
>>> one from Fink's X11. So, the question is, which header (or headers)
>>> are
>>> broken?
>>
>> In my case it is the official system header <OpenGL/glu.h> from the
>> 10.4.u SDK (which is identical to the 10.3.9 SDK). The X11 SDK and
>> fink are not installed.  The copyright note in it indicates it dates
>> to 1999
>>
>> gluTessCallback is declared there (identical to my 1992 red book) as
>>
>> extern void gluTessCallback (GLUtesselator* tess, GLenum which,
>> GLvoid (*CallBackFunc)());
>
> Then you should not be observing this problem. (And in fact, I'd  
> expect
> the patch applied for Fink to cause things to break when built against
> that header.) The problem is with glu.h where the declaration of
> gluTessCallback looks like this:
>
>         void gluTessCallback(GLUtesselator* tess, GLenum which,
>                              GLvoid (*CallBackFunc)(...));
>

Nowhere in any of the glu.h headers on the system is it declared in  
this way. I'm still not sure that this is a problem with the headers.

% locate glu.h | xargs grep gluTessCallback
/Developer/SDKs/MacOSX10.3.9.sdk/System/Library/Frameworks/ 
AGL.framework/Versions/A/Headers/glu.h:extern void gluTessCallback  
(GLUtesselator* tess, GLenum which, GLvoid (*CallBackFunc)());
/Developer/SDKs/MacOSX10.3.9.sdk/System/Library/Frameworks/ 
OpenGL.framework/Versions/A/Headers/glu.h:extern void gluTessCallback  
(GLUtesselator* tess, GLenum which, GLvoid (*CallBackFunc)());
/Developer/SDKs/MacOSX10.3.9.sdk/usr/X11R6/include/GL/glu.h:extern  
void gluTessCallback (GLUtesselator* tess, GLenum which, _GLUfuncptr  
CallBackFunc);
/Developer/SDKs/MacOSX10.4u.sdk/System/Library/Frameworks/ 
AGL.framework/Versions/A/Headers/glu.h:extern void gluTessCallback  
(GLUtesselator* tess, GLenum which, GLvoid (*CallBackFunc)());
/Developer/SDKs/MacOSX10.4u.sdk/System/Library/Frameworks/ 
OpenGL.framework/Versions/A/Headers/glu.h:extern void gluTessCallback  
(GLUtesselator* tess, GLenum which, GLvoid (*CallBackFunc)());
/Developer/SDKs/MacOSX10.4u.sdk/usr/X11R6/include/GL/glu.h:extern  
void gluTessCallback (GLUtesselator* tess, GLenum which, _GLUfuncptr  
CallBackFunc);
/System/Library/Frameworks/AGL.framework/Versions/A/Headers/ 
glu.h:extern void gluTessCallback (GLUtesselator* tess, GLenum which,  
GLvoid (*CallBackFunc)());
/System/Library/Frameworks/OpenGL.framework/Versions/A/Headers/ 
glu.h:extern void gluTessCallback (GLUtesselator* tess, GLenum which,  
GLvoid (*CallBackFunc)());
/usr/X11R6/include/GL/glu.h:extern void gluTessCallback  
(GLUtesselator* tess, GLenum which, _GLUfuncptr CallBackFunc);

and:
%grep _GLUfuncptr /usr/X11R6/include/GL/glu.h
/usr/X11R6/include/GL/glu.h:typedef GLvoid (*_GLUfuncptr)();
/usr/X11R6/include/GL/glu.h:typedef GLvoid (*_GLUfuncptr)(GLvoid);

Phil.