Link error with Cocotron

Question

I've recently built a linux platform interface for Cocotron, and was able to build the Foundation framework with no errors.

However, when linking my objective-C project, I get a linker error:

/Developer/Cocotron/1.0/Linux/i386/Frameworks/Foundation.framework//libFoundation.so: undefined reference to `__gnu_objc_personality_v0'

I've done a bit of googling, but haven't found anything all that helpful.

Here's my ld command line (simplified a bit for readability):

Ld /Users/me/MyProject/build/Linux/Release/ENCLAnalyzer normal i386
    cd /Users/me/MyProject
    /Developer/Cocotron/1.0/Linux/i386/gcc-4.3.1/bin/i386-ubuntu-linux-gcc -arch i386 
    -L/Users/me/MyProject/build/Linux/Release 
    -L../../frameworks/Shared/FFmpeg/Linux/lib 
    -L/Developer/Cocotron/1.0/PlatformInterfaces/i386-ubuntu-linux/lib 
    -L/Developer/Cocotron/1.0/PlatformInterfaces/i386-ubuntu-linux/intel/mkl/9.0/lib/32 
    -L/Developer/Cocotron/1.0/PlatformInterfaces/i386-ubuntu-linux/intel/ipp/5.1/ia32/sharedlib
    -L/Users/me/frameworks/Shared/FFmpeg/Linux/lib 

    -F/Users/me/MyProject/build/Linux/Release 
    -F/Users/me/frameworks/Shared 
    -F/Developer/Cocotron/1.0/Linux/i386/Frameworks 
    -F/Users/me/frameworks/OtherProject/Linux 

    -filelist "/Users/me/MyProject/build/Linux/MyProject.build/Release/MyProject Linux.build/Objects-normal/i386/MyProject.LinkFileList" 

    -Wl,-rpath-link,/Developer/Cocotron/1.0/PlatformInterfaces/i386-ubuntu-linux/lib 
    -Wl,-rpath-link,../../frameworks/Shared/FFmpeg/Linux/lib 
    -Wl,-rpath-link,/Developer/Cocotron/1.0/PlatformInterfaces/i386-ubuntu-linux/intel/ipp/5.1/ia32/sharedlib
    -Wl,-rpath-link,/Developer/Cocotron/1.0/PlatformInterfaces/i386-ubuntu-linux/intel/mkl/9.0/lib/32
    -Wl,-rpath-link,/Developer/Cocotron/1.0/Linux/i386/Frameworks/Foundation.framework 

    -framework Foundation -framework MyFramework1 -framework MyFramework2 -framework MyFramework3 
    -o /Users/me/MyProject/build/Linux/Release/MyProject

I have a feeling that the foundation project needs to link to a library that it isn't, or that maybe it is linking to the wrong version of some library. But I'm not sure.

Any help would be much appreciated.

Answer 1

Which compiler are you using? The one from Cococtron, I hope? Take a look at this discussion.

The __gnu_objc_personality_v0 occurs when you specify the incorrect compiler (say gcc for C++ code without the -x option). Try setting up some switches to tell g++ that you want to compile Obj-C code.

Answer 2

Update: There were some compiler updates in the Cocotron repository which fix this issue. The the install script has been updated to pick these up and the new version is here:

http://cocotron.org/Tools/Downloads/InstallCDT-2009-04-17.zip

Before using this, be sure to delete /Developer/Cocotron/1.0/Downloads/gcc-4.3.1.tar.bz2 or it won't pick up the new source. Make sure to specify Linux i386 when reinstalling.

i.e. sudo ./install.sh Linux i386

Thanks to Christopher Lloyd for the info above, and for emailing me the fix.