[CMake] How to prevent relinking targets with shared libraries

[blinkeye]

Hi guys

I'm getting along very well (and quickly!) with porting two large 
projects from Makefiles to CMake. Actually, 3 projects will follow later 
on (and possibly more). Yeah, CMake is actually THAT great. I just 
wanted to share my delight and acknowledgement of this tool, it makes 
developing C/C++ code just more fun.

Back to the topic: I wonder if it isn't possible to prevent relinking 
targets with a shared library if you didn't change any interface? Isn't 
this one of the reason for using shared libraries? I implemented a 
switch for either creating static libraries (like it used to be with the 
old Makefiles) or shared libraries. At the moment I'm just creating 
plain .so libs, without any version number (so far I didn't happen to 
come across a shared library tutorial with cmake), maybe this is the 
problem? Does cmake support such a versioning and would that resolve the 
relinking?

Regards