X-Git-Url: https://git.distorted.org.uk/~mdw/tripe/blobdiff_plain/408f7a2c28d32288e6d2e1935cd610fd8ff2b36a..f8204e509efff191e5f7215be07c7060a401475b:/configure.ac

diff --git a/configure.ac b/configure.ac
index a109beb6..887f81d3 100644
--- a/configure.ac
+++ b/configure.ac
@@ -9,19 +9,18 @@ dnl----- Licensing notice ---------------------------------------------------
 dnl
 dnl This file is part of Trivial IP Encryption (TrIPE).
 dnl
-dnl TrIPE is free software; you can redistribute it and/or modify
-dnl it under the terms of the GNU General Public License as published by
-dnl the Free Software Foundation; either version 2 of the License, or
-dnl (at your option) any later version.
+dnl TrIPE is free software: you can redistribute it and/or modify it under
+dnl the terms of the GNU General Public License as published by the Free
+dnl Software Foundation; either version 3 of the License, or (at your
+dnl option) any later version.
 dnl
-dnl TrIPE is distributed in the hope that it will be useful,
-dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
-dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-dnl GNU General Public License for more details.
+dnl TrIPE is distributed in the hope that it will be useful, but WITHOUT
+dnl ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+dnl FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+dnl for more details.
 dnl
 dnl You should have received a copy of the GNU General Public License
-dnl along with TrIPE; if not, write to the Free Software Foundation,
-dnl Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+dnl along with TrIPE.  If not, see <https://www.gnu.org/licenses/>.
 
 dnl--------------------------------------------------------------------------
 dnl Initialization.
@@ -64,6 +63,27 @@ case "$host_os" in
     ;;
 esac
 
+AC_ARG_WITH([adns],
+  AS_HELP_STRING([--with-adns],
+		 [use ADNS library for background name resolution]),
+  [want_adns=$withval],
+  [want_adns=auto])
+case $want_adns in
+  no) ;;
+  *) AC_CHECK_LIB([adns], [adns_submit], [have_adns=yes], [have_adns=no]) ;;
+esac
+AC_SUBST([ADNS_LIBS])
+case $want_adns,$have_adns in
+  yes,no)
+    AC_MSG_ERROR([ADNS library not found but explicitly requested])
+    ;;
+  yes,yes | auto,yes)
+    ADNS_LIBS="-ladns"
+    AC_DEFINE([HAVE_LIBADNS], [1],
+	      [Define if the GNU adns library is available.])
+    ;;
+esac
+
 PKG_CHECK_MODULES([mLib], [mLib >= 2.2.1])
 PKG_CHECK_MODULES([catacomb], [catacomb >= 2.2.2-38])