###############################
# start SMB_EXT_LIB_GNUTLS
# check for gnutls/gnutls.h and -lgnutls

use_gnutls=auto
AC_ARG_ENABLE(gnutls,
AS_HELP_STRING([--enable-gnutls],[Turn on gnutls support (default=yes)]),
    [if test x$enable_gnutls = xno; then
        use_gnutls=no
    fi])


if test x$use_gnutls = xauto && pkg-config --exists gnutls; then
	SMB_EXT_LIB_FROM_PKGCONFIG(GNUTLS, gnutls < 2.6.0, 
							   [use_gnutls=yes], 
							   [use_gnutls=no])
fi
	
if test x$use_gnutls = xauto; then
	AC_CHECK_HEADERS(gnutls/gnutls.h)
	AC_CHECK_LIB_EXT(gnutls, GNUTLS_LIBS, gnutls_global_init)
	AC_CHECK_DECL(gnutls_x509_crt_set_version,  
				  [AC_DEFINE(HAVE_GNUTLS_X509_CRT_SET_VERSION,1,gnutls set_version)], [], [
	#include <gnutls/gnutls.h>
	#include <gnutls/x509.h>
	])
	if test x"$ac_cv_header_gnutls_gnutls_h" = x"yes" -a x"$ac_cv_lib_ext_gnutls_gnutls_global_init" = x"yes" -a x"$ac_cv_have_decl_gnutls_x509_crt_set_version" = x"yes";then
		SMB_ENABLE(GNUTLS,YES)
		AC_CHECK_DECL(gnutls_x509_crt_set_subject_key_id,  
					  [AC_DEFINE(HAVE_GNUTLS_X509_CRT_SET_SUBJECT_KEY_ID,1,gnutls subject_key)], [], [
	#include <gnutls/gnutls.h>
	#include <gnutls/x509.h>
	])
	fi
	SMB_EXT_LIB(GNUTLS, $GNUTLS_LIBS)
fi
if test x$use_gnutls = xyes; then
	#Some older versions have a different type name
	AC_CHECK_TYPES([gnutls_datum],,,[#include "gnutls/gnutls.h"])
	AC_CHECK_TYPES([gnutls_datum_t],,,[#include "gnutls/gnutls.h"])
	AC_DEFINE(ENABLE_GNUTLS,1,[Whether we have gnutls support (SSL)])
	AC_CHECK_HEADERS(gcrypt.h)
fi