Hello, I was not able to reproduce this with the git master, the module loaded fine for me. Can you post the ldd output from your compilation? This is what I got on my machine:
$ kamailio2/src/modules/auth_ephemeral> ldd auth_ephemeral.so linux-vdso.so.1 (0x00007ffce5dc0000) libssl.so.1.0.0 => /lib64/libssl.so.1.0.0 (0x00007f75affd3000) libc.so.6 => /lib64/libc.so.6 (0x00007f75afc2e000) libcrypto.so.1.0.0 => /lib64/libcrypto.so.1.0.0 (0x00007f75af7d5000) /lib64/ld-linux-x86-64.so.2 (0x00007f75b045c000) libdl.so.2 => /lib64/libdl.so.2 (0x00007f75af5d1000) libz.so.1 => /lib64/libz.so.1 (0x00007f75af3bb000)