btrace.c, btrace.h

A simple tracing filter, useful if you lose track of where a particular BIO is used and you want to figure out its ins and outs. For deeper inspection, launch your favorit debugger and set breakpoints on the internal functions.

cmake/Modules/FindOpenSSL.cmake

A cmake hack on top of the regular FindOpenSSL.cmake, which allows setting the OpenSSL root directory to a build directory, and that also generates OPENSSL_ROOT_DIR if it's not already defined (because the user chose to search along CMAKE_PREFIX_PATH).

It's self-documented.

perl/lib/WrapOpenSSL.pm

A plugin for App::Prove, the harness application ('prove') to be used to run Test::More, Test2::Suite and similar test suites. It works best in conjunction with the cmake module above.