Keep compile options through upgrade

[Olivier Certner]

 Hello all,

 Is there an easy way to keep/retrieve the options last used to compile a 
given port? This could be used with portupgrade to upgrade to a newer version 
while retaining the previous build-time configuration (of course this won't 
work if the options available change).

 Maybe I could put all the options in make.conf, but in this case I fear that 
this file would become really messy. Moreover, if options are shared by 
several ports, no fine grain tuning per port will be possible.

 Any advices?

 Regards,

  Olivier