Quote Originally Posted by vermarajeev View Post
But when I type
./configure on command prompt I get this error
'.' is not recognized as an internal or external command
That configure file is a shell script, not an executable. You have to run it from a shell, for example from MSYS. If you don't have any shell that will interpret that script, you will have to do what that script should do by hand, which shouldn't be that hard --- it's just a matter of setting certain variables in the .pro file.

Of course, after compiling QCA, you will have to compile the plugin which is available as a separate archive (not that this plugin will require OpenSSL).