AC_CHECK_HEADERS(gnutls/gnutls.h)
if test $ac_cv_header_gnutls_gnutls_h = yes ; then
+ AC_PREPROC_IFELSE(
+ [[#include <gnutls/gnutls.h>]
+[#if GNUTLS_VERSION_NUMBER < 0x020c00]
+[#error "GnuTLS 2.12.0 or newer required"]
+[#endif]],
+ , [AC_MSG_FAILURE([GnuTLS is too old])])
+
AC_CHECK_LIB(gnutls, gnutls_init,
[have_gnutls=yes], [have_gnutls=no])