[CMake] dlopen()able library making

[Craig Bradney]

Hi,

I'm making decent progress in the conversion of Scribus to cmake (main app 
runs now with all dependencies found.. yay!).. but now I'm stuck up against 
creating the dlopen()able plugins. The symbols exist but seem to be marked 
undefined.. eg:
360: 00000000     0 NOTYPE  GLOBAL DEFAULT  UND _ZTV16ColorWheelPlugin
versus the autohell built one:
370: 000236a0   128 OBJECT  WEAK   DEFAULT   21 _ZTV16ColorWheelPlugin

Google has led me up various garden paths and anything I see doesn't seem to 
get me anywhere. Can anyone help with this one?

Thanks
Craig Bradney
Scribus Team