How can I build OpenSSL so I can statically link them for use with Indy 10.6 for Windows 32/64 platforms? Is there an in depth guide somewhere to compile without any VC++ dependencies? I heard that Indy needs custom OpenSSL code not the official one. Also what compiler to use? VS2010, VS11, VS13?
It would be nice if it came with .lib files like it does for iOS.
Indy stopped using custom-built OpenSSL DLLs years ago and has been using official DLLs ever since.
However, Indy does not currently support static linking of OpenSSL on non-iOS platforms at this time (there is a TODO item for that, but don't expect it to be implemented anytime soon, unless someone else does it and submits the changes for inclusion in Indy). Even if you could compile static .obj files for OpenSSL on Windows, it would still require some code changes inside of Indy's source to make use of those files. You would have to make those changes manually (see this discussion: How to statically link Indy SSL files) until they are made in Indy natively at some future time.
The only reason Indy supports OpenSSL statically on iOS is because Apple does not allow OpenSSL to be used dynamically on iOS devices (it does in the iOS simulator, though). Every other platform does allow OpenSSL to be loaded dynamically, and that is how OpenSSL is primarily designed to be used.