avoid getpass when not used some systems (like android's bionic) do not provide getpass. you can disable ENABLE_CLI_PASSWORD_AUTH & ENABLE_CLI_INTERACT_AUTH to avoid its use (and rely on pubkey auth), but the link still fails because the support file calls getpass. do not define this func if both of those auth methods are not used.

#ifndef DROPBEAR_CRYPTO_DESC_H
#define DROPBEAR_CRYPTO_DESC_H

void crypto_init();

extern int dropbear_ltc_prng;

#endif /* DROPBEAR_CRYPTO_DESC_H */