Re: linking libGL: cycle in dylib re-exports? (resolved)

Thanks very much, that  worked. 

The updated command line is:

echo 'static void *foo; int main() { foo = (void *)glGetIntegerv; }' | g++ -xc++ - -I/usr/X11R6/include -includeGL/gl.h -L/usr/X11R6/lib -lGL -Wl,-dylib_file,/System/Library/Frameworks/OpenGL.framework/Versions/A/Libraries/libGL.dylib:/System/Library/Frameworks/OpenGL.framework/Versions/A/Libraries/libGL.dylib

Abe

On Oct 29, 2007, at 4:06 AM, Martin Costabel wrote:

Abe Stephens wrote:

Hi, I'm encountering a linking problem whenever I attempt to link to X11's libGL in Leopard. Here is a concise example:

echo 'static void *foo; int main() { foo = (void *)glGetIntegerv; }' | g++ -xc++ - -I/usr/X11R6/include -includeGL/gl.h -L/usr/X11R6/lib -lGL

ld: cycle in dylib re-exports with /usr/X11R6/lib/libGL.dylib

collect2: ld returned 1 exit status

Does anyone have some advice on how to fix this?

This is a new feature (AKA bug) in /usr/bin/ld, coupled with the fact that Apple rather stupidly chose the same name "libGL.dylib" for two linked but different libraries in /usr/X11/lib and in the OpenGL framework.

A fix is described here:
<http://wiki.finkproject.org/index.php/Fink:Packaging:Preparing_for_10.5#OpenGL_Bug>

Please file a bug on bugreport.apple.com.

--
Martin

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