diff --git a/configure.ac b/configure.ac
index ac2e086..74a2466 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,10 +1,10 @@
 dnl run autogen.sh to generate the configure script.
 
-AC_PREREQ(2.59)
+AC_PREREQ(2.63)
 
-AC_INIT(rampartc-src, 1.3.0)
-AC_CANONICAL_SYSTEM
-AM_CONFIG_HEADER(config.h)
+AC_INIT([rampartc-src],[1.3.0])
+AC_CANONICAL_TARGET
+AC_CONFIG_HEADERS([config.h])
 dnl AM_INIT_AUTOMAKE([tar-ustar])
 AM_INIT_AUTOMAKE
 m4_ifdef([_A][M_PROG_TAR],[_A][M_SET_OPTION([tar-ustar])])
@@ -14,26 +14,26 @@
 AC_PROG_CC
 AC_PROG_CXX
 AC_PROG_CPP
-AC_PROG_LIBTOOL
+LT_INIT
 AC_PROG_INSTALL
 AC_PROG_LN_S
 AC_PROG_MAKE_SET
 
 dnl check for flavours of varargs macros (test from GLib)
 AC_MSG_CHECKING(for ISO C99 varargs macros in C)
-AC_TRY_COMPILE([],[
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[
 int a(int p1, int p2, int p3);
 #define call_a(...) a(1,__VA_ARGS__)
 call_a(2,3);
-],axis2c_have_iso_c_varargs=yes,axis2c_have_iso_c_varargs=no)
+]])],[axis2c_have_iso_c_varargs=yes],[axis2c_have_iso_c_varargs=no])
 AC_MSG_RESULT($axis2c_have_iso_c_varargs)
 
 AC_MSG_CHECKING(for GNUC varargs macros)
-AC_TRY_COMPILE([],[
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[
 int a(int p1, int p2, int p3);
 #define call_a(params...) a(1,params)
 call_a(2,3);
-],axis2c_have_gnuc_varargs=yes,axis2c_have_gnuc_varargs=no)
+]])],[axis2c_have_gnuc_varargs=yes],[axis2c_have_gnuc_varargs=no])
 AC_MSG_RESULT($axis2c_have_gnuc_varargs)
 
 dnl Output varargs tests
diff --git a/samples/configure.ac b/samples/configure.ac
index 9f162c4..a373d6a 100644
--- a/samples/configure.ac
+++ b/samples/configure.ac
@@ -1,10 +1,10 @@
 dnl run autogen.sh to generate the configure script.
 
-AC_PREREQ(2.59)
+AC_PREREQ(2.63)
 
-AC_INIT(rampart-samples-src, 1.3.0)
-AC_CANONICAL_SYSTEM
-AM_CONFIG_HEADER(config.h)
+AC_INIT([rampart-samples-src],[1.3.0])
+AC_CANONICAL_TARGET
+AC_CONFIG_HEADERS([config.h])
 dnl AM_INIT_AUTOMAKE([tar-ustar])
 AM_INIT_AUTOMAKE
 m4_ifdef([_A][M_PROG_TAR],[_A][M_SET_OPTION([tar-ustar])])
@@ -14,26 +14,26 @@
 AC_PROG_CC
 AC_PROG_CXX
 AC_PROG_CPP
-AC_PROG_LIBTOOL
+LT_INIT
 AC_PROG_INSTALL
 AC_PROG_LN_S
 AC_PROG_MAKE_SET
 
 dnl check for flavours of varargs macros (test from GLib)
 AC_MSG_CHECKING(for ISO C99 varargs macros in C)
-AC_TRY_COMPILE([],[
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[
 int a(int p1, int p2, int p3);
 #define call_a(...) a(1,__VA_ARGS__)
 call_a(2,3);
-],axis2c_have_iso_c_varargs=yes,axis2c_have_iso_c_varargs=no)
+]])],[axis2c_have_iso_c_varargs=yes],[axis2c_have_iso_c_varargs=no])
 AC_MSG_RESULT($axis2c_have_iso_c_varargs)
 
 AC_MSG_CHECKING(for GNUC varargs macros)
-AC_TRY_COMPILE([],[
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[
 int a(int p1, int p2, int p3);
 #define call_a(params...) a(1,params)
 call_a(2,3);
-],axis2c_have_gnuc_varargs=yes,axis2c_have_gnuc_varargs=no)
+]])],[axis2c_have_gnuc_varargs=yes],[axis2c_have_gnuc_varargs=no])
 AC_MSG_RESULT($axis2c_have_gnuc_varargs)
 
 dnl Output varargs tests