Hi joalan, and welcome to LQ!
To add to ardvark71's point. The main reason here is that threads and posts to this forum do not show up in the normal filtering of open problem threads which are hoping for advice to help resolve them.
Please do not try to duplicate post somewhere else. The moderator for this new member intro forum will address this and move your question to a better forum. Please allow them the time to take that action. That's not myself and I need to leave it to the correct forum moderator.
I did a brief search and found the following reference:
http://www.unix.com/shell-programmin...al-target.html
Their solution was to change a configure option from --target to --with-target. I know that you're not using that configure attribute, however this still shows in the warnings. Please consider looking at configure options to help remove the warnings and perhaps this will self-resolve this.
Sorry, that's about my limit on this, I've never built openca.
Best Regards and welcome again,
- RT