---- dar-2.2.2/configure.ac.orig 2005-05-08 18:32:26.000000000 +0200
-+++ dar-2.2.2/configure.ac 2005-05-24 00:18:13.000000000 +0200
-@@ -377,8 +377,8 @@
- AC_ARG_ENABLE( [debug],
- AC_HELP_STRING(--enable-debug, [build targets with debugging option and no optimization]),
- [
-- CXXFLAGS="-ggdb -Wall"
-- CFLAGS="-ggdb -Wall"
-+ CXXFLAGS="$CXXFLAGS -Wall"
-+ CFLAGS="$CFLAGS -Wall"
- debug_static="yes"
- ],
- [
---- dar-2.2.5/configure.ac~ 2005-12-07 09:20:47.921524496 +0100
-+++ dar-2.2.5/configure.ac 2005-12-07 09:21:20.414584800 +0100
-@@ -16,7 +16,6 @@
+--- dar-2.5.9/configure.ac.orig 2017-01-21 11:59:32.000000000 +0100
++++ dar-2.5.9/configure.ac 2017-03-30 18:00:31.489079633 +0200
+@@ -30,7 +30,6 @@
AC_PROG_CC
AC_PROG_LIBTOOL
AC_PROG_MAKE_SET
-AC_PROG_RANLIB
- # Checks for libraries.
- AC_CHECK_LIB(socket, [socket], [], [])
+ AC_MSG_CHECKING([for C++ compiler usability])
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([],
+@@ -888,7 +887,7 @@
+ AC_HELP_STRING(--enable-debug, [build targets with debugging option and no optimization]),
+ [
+ # yes we modify user variable here to remove any optimization
+- CXXFLAGS="$CXXSTDFLAGS -ggdb -Wall"
++ CXXFLAGS="$CXXFLAGS -ggdb -Wall"
+ CFLAGS="-ggdb -Wall"
+ LDFLAGS="-ggdb -Wall"
+ debug_static="yes"