On Fri, 19 Nov 2021, Will Cosgrove via libssh2-devel wrote: > You can test if backend defines are set, like so: > > #ifdef LIBSSH2_OPENSSL > //enabled > #endif > > #ifdef LIBSSH2_LIBGCRYPT > //enabled > #endif I wouldn't mind being able to extract that info at run-time rather than build-time. But we don't seem to have any API for that today... -- / daniel.haxx.se