Informix ClientSDK, Help

[Efren Bravo]

Hi,
  
I've read the limited information there are on Internet about this theme and some people say that this work should be done with SCO OpenServer CSDK (http://www-01.ibm.com/software/data/informix/tools/csdk/requirements/sco-oserver.html) plus the binary emulation of CSO and others that it should be done with the Linux CSDK.  
  
- Which option do you consider better?  
- Using SCO CSDK, where the binary emulation is?  
- Using Linux CSDK, which Linux (http://www-01.ibm.com/software/data/informix/linux/csdk.html)?  
  
The goal of this is to be able to use unixODBC (http://www.unixodbc.org/doc/informix.html) to handle connections. If you know a better option, please tell me.
  

I appreciate any help you can give me  
Thanks in advance...