That is an "interesting" issue... I'm guessing that freeglut test probably has something like:

#ifdef __APPLE__
#define PFNGLGENBUFFERSPROC ...
...
#endif

That's because Apple's OpenGL.framework doesn't use the same naming convention for the OpenGL function pointer types as Mesa/Windows does.  We exist in an awkward state bridging the two... in order to be as compatible as possible at the source level, I decided to support both conventions.

It looks like the freeglut test tried to be too clever for its own good...

On 04/25/2009 08:22 PM, Jack Howarth wrote: 
On Sat, Apr 25, 2009 at 11:03:03PM -0400, Jack Howarth wrote:
  
   While attempting to build some test packaging for
the new freeglut 2.6.0-rc1 release on Intel Darwin,
I discovered that their build fails in the freeglut
demo programs with the error...

Making all in smooth_opengl3
gcc -DHAVE_CONFIG_H -I. -I../../..   -I/sw/include -I../../../include -I/usr/X11R6/include -O3 -DTARGET_HOST_POSIX_X11 -c -o smooth_opengl3-smooth_opengl3.o `test -f 'smooth_opengl3.c' || echo './'`smooth_opengl3.c
smooth_opengl3.c:101: error: redefinition of typedef 'PFNGLGENBUFFERSPROC'
/usr/X11R6/include/GL/gl.h:1884: error: previous declaration of 'PFNGLGENBUFFERSPROC' was here
smooth_opengl3.c:104: error: redefinition of typedef 'PFNGLBINDBUFFERPROC'
/usr/X11R6/include/GL/gl.h:1882: error: previous declaration of 'PFNGLBINDBUFFERPROC' was here
smooth_opengl3.c:107: error: redefinition of typedef 'PFNGLBUFFERDATAPROC'
/usr/X11R6/include/GL/gl.h:1886: error: previous declaration of 'PFNGLBUFFERDATAPROC' was here
smooth_opengl3.c:110: error: redefinition of typedef 'PFNGLCREATESHADERPROC'
/usr/X11R6/include/GL/gl.h:1939: error: previous declaration of 'PFNGLCREATESHADERPROC' was here
smooth_opengl3.c:113: error: redefinition of typedef 'PFNGLSHADERSOURCEPROC'
/usr/X11R6/include/GL/gl.h:1940: error: previous declaration of 'PFNGLSHADERSOURCEPROC' was here
smooth_opengl3.c:116: error: redefinition of typedef 'PFNGLCOMPILESHADERPROC'
/usr/X11R6/include/GL/gl.h:1941: error: previous declaration of 'PFNGLCOMPILESHADERPROC' was here
smooth_opengl3.c:119: error: redefinition of typedef 'PFNGLCREATEPROGRAMPROC'
/usr/X11R6/include/GL/gl.h:1942: error: previous declaration of 'PFNGLCREATEPROGRAMPROC' was here
smooth_opengl3.c:122: error: redefinition of typedef 'PFNGLATTACHSHADERPROC'
/usr/X11R6/include/GL/gl.h:1943: error: previous declaration of 'PFNGLATTACHSHADERPROC' was here
smooth_opengl3.c:125: error: redefinition of typedef 'PFNGLLINKPROGRAMPROC'
/usr/X11R6/include/GL/gl.h:1944: error: previous declaration of 'PFNGLLINKPROGRAMPROC' was here
smooth_opengl3.c:128: error: redefinition of typedef 'PFNGLUSEPROGRAMPROC'
/usr/X11R6/include/GL/gl.h:1945: error: previous declaration of 'PFNGLUSEPROGRAMPROC' was here
smooth_opengl3.c:131: error: redefinition of typedef 'PFNGLGETSHADERIVPROC'
/usr/X11R6/include/GL/gl.h:1969: error: previous declaration of 'PFNGLGETSHADERIVPROC' was here
smooth_opengl3.c:134: error: redefinition of typedef 'PFNGLGETSHADERINFOLOGPROC'
/usr/X11R6/include/GL/gl.h:1972: error: previous declaration of 'PFNGLGETSHADERINFOLOGPROC' was here
smooth_opengl3.c:137: error: redefinition of typedef 'PFNGLGETPROGRAMIVPROC'
/usr/X11R6/include/GL/gl.h:1970: error: previous declaration of 'PFNGLGETPROGRAMIVPROC' was here
smooth_opengl3.c:140: error: redefinition of typedef 'PFNGLGETPROGRAMINFOLOGPROC'
/usr/X11R6/include/GL/gl.h:1973: error: previous declaration of 'PFNGLGETPROGRAMINFOLOGPROC' was here
smooth_opengl3.c:143: error: redefinition of typedef 'PFNGLGETATTRIBLOCATIONPROC'
/usr/X11R6/include/GL/gl.h:1981: error: previous declaration of 'PFNGLGETATTRIBLOCATIONPROC' was here
smooth_opengl3.c:146: error: redefinition of typedef 'PFNGLVERTEXATTRIBPOINTERPROC'
/usr/X11R6/include/GL/gl.h:1930: error: previous declaration of 'PFNGLVERTEXATTRIBPOINTERPROC' was here
smooth_opengl3.c:149: error: redefinition of typedef 'PFNGLENABLEVERTEXATTRIBARRAYPROC'
/usr/X11R6/include/GL/gl.h:1931: error: previous declaration of 'PFNGLENABLEVERTEXATTRIBARRAYPROC' was here
smooth_opengl3.c:152: error: redefinition of typedef 'PFNGLGETUNIFORMLOCATIONPROC'
/usr/X11R6/include/GL/gl.h:1974: error: previous declaration of 'PFNGLGETUNIFORMLOCATIONPROC' was here
smooth_opengl3.c:155: error: redefinition of typedef 'PFNGLUNIFORMMATRIX4FVPROC'
/usr/X11R6/include/GL/gl.h:1966: error: previous declaration of 'PFNGLUNIFORMMATRIX4FVPROC' was here
smooth_opengl3.c: In function 'main':
smooth_opengl3.c:425: error: 'GLUT_FORWARD_COMPATIBLE' undeclared (first use in this function)
smooth_opengl3.c:425: error: (Each undeclared identifier is reported only once
smooth_opengl3.c:425: error: for each function it appears in.)
smooth_opengl3.c:425: error: 'GLUT_DEBUG' undeclared (first use in this function)
make[4]: *** [smooth_opengl3-smooth_opengl3.o] Error 1
make[3]: *** [all-recursive] Error 1
make[2]: *** [all-recursive] Error 1
make[1]: *** [all-recursive] Error 1

This appears to be coming from the definitions that exist in our gl.h. These definitions don't exist in the
gl.h of Fedora 10 but are in glext.h instead. I noticed we have the comment...

/* The following macros exist to address conflicts between the names given to
 * function pointers by the MESA API and OpenGL.framework's API.
 */

We should probably make the freeglut developers aware of this issue so we don't have to
heavily patch the freeglut 2.6.0 release. Any particular comments on this?
                        Jack
    

Disabling the problem demo, I am able to completely build the freeglut 2.6.0-rc1 under
fink unstable and it appears to run all the pre-existing binaries without issue as drop
in replacement for 2.4.0. I have no issues with pymol, molmol or ccpnmr built against
fink's freeglut. If anyone is interested, here is the freeglut.info file I used in 
fink unstable...

Package: freeglut
Version: 2.6.0
Revision: 0rc1
Maintainer: Jack Howarth <howarth@bromo.med.uc.edu>
Source: mirror:sourceforge:freeglut/%N-%v-rc1.tar.gz
Source-MD5: b1a8107f99b5d953e8418a5409462294
SourceDirectory: %n-%v
Depends: %N-shlibs (= %v-%r)
BuildDepends: fink (>= 0.24.12), x11-dev
Conflicts: glut, openglut
Replaces: glut, openglut
ConfigureParams: --disable-replace-glut --disable-warnings --disable-dependency-tracking --x-includes=/usr/X11R6/include --x-libraries=/usr/X11R6/lib RANLIB='ranlib -c' --build=%m-apple-darwin`uname -r|cut -f1 -d.` --host=%m-apple-darwin`uname -r|cut -f1 -d.`
SetCFLAGS: -O3 -DTARGET_HOST_POSIX_X11
SetLDFLAGS: -Wl,-dylib_file,/System/Library/Frameworks/OpenGL.framework/Versions/A/Libraries/libGL.dylib:/System/Library/Frameworks/OpenGL.framework/Versions/A/Libraries/libGL.dylib
PatchScript: <<
  perl -pi -e 's/hardcode_direct=yes/hardcode_direct=no/g' configure
  perl -pi -e 's/ smooth_opengl3//g' ./progs/demos/Makefile.in
<<
DocFiles: AUTHORS COPYING ChangeLog INSTALL NEWS README TODO
BuildDependsOnly: True
InstallScript: <<
make install DESTDIR=%d
ln -s libfreeglut.3.dylib %i/lib/libglut.dylib
ln -s libfreeglut.a %i/lib/libglut.a
ln -s libfreeglut.la %i/lib/libglut.la
ln -s freeglut.h %i/include/GL/glut.h
ln -s freeglut_ext.h %i/include/GL/glut_ext.h
ln -s freeglut_std.h %i/include/GL/glut_std.h
<<
SplitOff: <<
 Package: %N-shlibs
 Depends: libgl, x11
 Files: lib/libfreeglut.3.9.0.dylib lib/libfreeglut.3.dylib
 Shlibs: %p/lib/libfreeglut.3.dylib 13.0.0 %n (>= 2.6.0-Orc1)
 DocFiles: AUTHORS COPYING ChangeLog INSTALL NEWS README TODO
<<
Description: Opengl utility toolkit
DescDetail: <<
Freeglut is a completely OpenSourced alternative to the OpenGL Utility 
Toolkit (GLUT) library released under the X-Consortium license. The
original GLUT library seems to have been abandoned with the most recent
version (3.7) dating back to August 1998. Its license does not allow 
anyone to distribute modified library code. Freeglut is actively
developed and doesn't suffer the license restrictions. The goal is
to gradually depreciate the current glut package out of fink replacing
it with freeglut.
<<
DescPackaging: <<
This package is NOT binary compatible with glut/glut-shlibs and can not
replace for them. Packages that wish to use freeglut as a replacement
for glut cannot have "BuildDepends: glut|freeglut" and "Depends:
glut-shlibs|freeglut-shlibs" in their info file, but need to pick one
self-consistently.

This package builds the freeglut libraries named as freeglut rather than
glut to allow the co-existance with glut since the shared library versioning
is identical. I have adopted the use of symlinks for the libraries and 
headers to allow freeglut to used as a drop in replace for glut without
requiring changes in the source code of programs which require glut.

Patch fixes crash in flightgear (taken from RH's Fedora 7 package).
<<
License: OSI-Approved
Homepage: http://freeglut.sourceforge.net/

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