#cmakedefine HTTPS_BACKEND_CURL
#cmakedefine HTTPS_BACKEND_OPENSSL
#cmakedefine HTTPS_BACKEND_SCHANNEL
#cmakedefine HTTPS_BACKEND_NSURL
#cmakedefine HTTPS_BACKEND_ANDROID
#cmakedefine HTTPS_BACKEND_WININET
#cmakedefine HTTPS_USE_WINSOCK
#cmakedefine DEBUG_SCHANNEL
#cmakedefine HTTPS_LIBRARY_LOADER_WINDOWS
#cmakedefine HTTPS_LIBRARY_LOADER_UNIX