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Multiply defined symbols from system frameworks

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Multiply defined symbols from system frameworks

Subject: Multiply defined symbols from system frameworks
From: Philip Lamb <email@hidden>
Date: Thu, 1 Sep 2005 17:03:49 -0700

Hi all,

Is there some switch for ld, or some other method, by which I can prevent ld from linking symbols in from system frameworks?

I am trying to link an executable against X11's OpenGL, and I am getting errors like this: /usr/bin/ld: warning multiple definitions of symbol _glPointParameteri /System/Library/Frameworks/OpenGL.framework/Versions/A/Libraries/ libGL.dylib(gll_api.o) definition of _glPointParameteri /usr/X11R6/lib/libGL.dylib(dri_dispatch.o) definition of _glPointParameteri /usr/bin/ld: warning multiple definitions of symbol _glPointParameteriv /System/Library/Frameworks/OpenGL.framework/Versions/A/Libraries/ libGL.dylib(gll_api.o) definition of _glPointParameteriv /usr/X11R6/lib/libGL.dylib(dri_dispatch.o) definition of _glPointParameteriv symbol _glPointParameteri used from dynamic library /System/Library/ Frameworks/OpenGL.framework/Versions/A/Libraries/libGL.dylib (gll_api.o) not from earlier dynamic library /usr/X11R6/lib/libGL. 1.dylib(dri_dispatch.o) symbol _glPointParameteriv used from dynamic library /System/Library/ Frameworks/OpenGL.framework/Versions/A/Libraries/libGL.dylib (gll_api.o) not from earlier dynamic library /usr/X11R6/lib/libGL. 1.dylib(dri_dispatch.o)

The program does link.. but it crashes on X startup, with what I believe is an error caused by symbols being linked from the wrong library:

Exception:  EXC_BAD_ACCESS (0x0001)
Codes:      KERN_PROTECTION_FAILURE (0x0002) at 0x0000005c

Thread 0 Crashed:
0   libGL.1.dylib         0x9cc3673c glXGetVisualFromFBConfig + 12
1   dyld                  0x8fe165f8 stub_binding_helper_interface + 56
[snip]

I have tried supplying -Z to ld, but the system frameworks are still linked in (although /usr/lib and friends are not).

Any suggestions?

Regards,
Phil.
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