import Options

def set_options(opt):
    # allow users to disable gnutls
    opt.add_option('--disable-gnutls',
                   help=("Disable use of gnutls"),
                   action="store_true", dest='disable_gnutls', default=False)

def configure(conf):
    # check for gnutls
    conf.check_cfg(package='gnutls',
                   args='"gnutls >= 1.4.0" --cflags --libs',
                   msg='Checking for gnutls >= 1.4.0', mandatory=False)

    if 'HAVE_GNUTLS' in conf.env and not Options.options.disable_gnutls:
        conf.DEFINE('ENABLE_GNUTLS', 1)

    conf.CHECK_FUNCS_IN('gnutls_global_init', 'gnutls', headers='gnutls/gnutls.h')

    conf.CHECK_VARIABLE('gnutls_x509_crt_set_version',
                        headers='gnutls/gnutls.h gnutls/x509.h',
                        define='HAVE_GNUTLS_X509_CRT_SET_VERSION')
    conf.CHECK_VARIABLE('gnutls_x509_crt_set_subject_key_id',
                        headers='gnutls/gnutls.h gnutls/x509.h',
                        define='HAVE_GNUTLS_X509_CRT_SET_SUBJECT_KEY_ID')

    # check for gnutls_datum types
    conf.CHECK_TYPES('gnutls_datum gnutls_datum_t', headers='gnutls/gnutls.h')

    conf.CHECK_FUNCS_IN('gcry_control', 'gcrypt', headers='gcrypt.h')
    conf.CHECK_FUNCS_IN('gpg_err_code_from_errno', 'gpg-error')


def build(bld):
    bld.SAMBA_SUBSYSTEM('LIBTLS',
                        source='tls.c tlscert.c',
                        public_deps='talloc gnutls gcrypt LIBSAMBA-HOSTCONFIG samba_socket'
                        )