diff --git a/src/configure b/src/configure
index 11de19cf680d23cd9fbc297b842b08a8bce85868..b00d922090baf2d6939d933891513dbc02502422 100755
--- a/src/configure
+++ b/src/configure
@@ -3102,7 +3102,10 @@ fi
 
 if eval "test \"`echo '$ac_cv_func_'strdup`\" = yes"; then
   echo "$ac_t""yes" 1>&6
-  STRDUP='../../utils/strdup.o'
+  STRDUP='../../utils/strdup.o' cat >> confdefs.h <<\EOF
+#define HAVE_STRDUP 1
+EOF
+
 else
   echo "$ac_t""no" 1>&6
 fi
@@ -3110,12 +3113,12 @@ fi
 
 
 echo $ac_n "checking for cbrt""... $ac_c" 1>&6
-echo "configure:3114: checking for cbrt" >&5
+echo "configure:3117: checking for cbrt" >&5
 if eval "test \"`echo '$''{'ac_cv_func_cbrt'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 3119 "configure"
+#line 3122 "configure"
 #include "confdefs.h"
 /* System header to define __stub macros and hopefully few prototypes,
     which can conflict with char cbrt(); below.  */
@@ -3138,7 +3141,7 @@ cbrt();
 
 ; return 0; }
 EOF
-if { (eval echo configure:3142: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest; then
+if { (eval echo configure:3145: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest; then
   rm -rf conftest*
   eval "ac_cv_func_cbrt=yes"
 else
@@ -3159,7 +3162,7 @@ EOF
 else
   echo "$ac_t""no" 1>&6
 echo $ac_n "checking for cbrt in -lm""... $ac_c" 1>&6
-echo "configure:3163: checking for cbrt in -lm" >&5
+echo "configure:3166: checking for cbrt in -lm" >&5
 ac_lib_var=`echo m'_'cbrt | sed 'y%./+-%__p_%'`
 if eval "test \"`echo '$''{'ac_cv_lib_$ac_lib_var'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
@@ -3167,7 +3170,7 @@ else
   ac_save_LIBS="$LIBS"
 LIBS="-lm  $LIBS"
 cat > conftest.$ac_ext <<EOF
-#line 3171 "configure"
+#line 3174 "configure"
 #include "confdefs.h"
 /* Override any gcc2 internal prototype to avoid an error.  */
 /* We use char because int might match the return type of a gcc2
@@ -3178,7 +3181,7 @@ int main() {
 cbrt()
 ; return 0; }
 EOF
-if { (eval echo configure:3182: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest; then
+if { (eval echo configure:3185: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest; then
   rm -rf conftest*
   eval "ac_cv_lib_$ac_lib_var=yes"
 else
@@ -3204,12 +3207,12 @@ fi
 fi
 
 echo $ac_n "checking for rint""... $ac_c" 1>&6
-echo "configure:3208: checking for rint" >&5
+echo "configure:3211: checking for rint" >&5
 if eval "test \"`echo '$''{'ac_cv_func_rint'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 3213 "configure"
+#line 3216 "configure"
 #include "confdefs.h"
 /* System header to define __stub macros and hopefully few prototypes,
     which can conflict with char rint(); below.  */
@@ -3232,7 +3235,7 @@ rint();
 
 ; return 0; }
 EOF
-if { (eval echo configure:3236: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest; then
+if { (eval echo configure:3239: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest; then
   rm -rf conftest*
   eval "ac_cv_func_rint=yes"
 else
@@ -3253,7 +3256,7 @@ EOF
 else
   echo "$ac_t""no" 1>&6
 echo $ac_n "checking for rint in -lm""... $ac_c" 1>&6
-echo "configure:3257: checking for rint in -lm" >&5
+echo "configure:3260: checking for rint in -lm" >&5
 ac_lib_var=`echo m'_'rint | sed 'y%./+-%__p_%'`
 if eval "test \"`echo '$''{'ac_cv_lib_$ac_lib_var'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
@@ -3261,7 +3264,7 @@ else
   ac_save_LIBS="$LIBS"
 LIBS="-lm  $LIBS"
 cat > conftest.$ac_ext <<EOF
-#line 3265 "configure"
+#line 3268 "configure"
 #include "confdefs.h"
 /* Override any gcc2 internal prototype to avoid an error.  */
 /* We use char because int might match the return type of a gcc2
@@ -3272,7 +3275,7 @@ int main() {
 rint()
 ; return 0; }
 EOF
-if { (eval echo configure:3276: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest; then
+if { (eval echo configure:3279: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest; then
   rm -rf conftest*
   eval "ac_cv_lib_$ac_lib_var=yes"
 else
diff --git a/src/configure.in b/src/configure.in
index 0b6fd14033506ae771b52b62cc4257641c144732..e813c96dd0bea139e5b8f546578d69fd89ac09f8 100644
--- a/src/configure.in
+++ b/src/configure.in
@@ -159,7 +159,7 @@ AC_FUNC_VPRINTF
 AC_CHECK_FUNCS(isinf tzset getrusage vfork memmove sigsetjmp kill sysconf)
 AC_CHECK_FUNCS(sigprocmask waitpid setsid)
 AC_CHECK_FUNC(inet_aton, AC_DEFINE(HAVE_INET_ATON), INET_ATON='inet_aton.o')
-AC_CHECK_FUNC(strdup, STRDUP='../../utils/strdup.o')
+AC_CHECK_FUNC(strdup, [STRDUP='../../utils/strdup.o' AC_DEFINE(HAVE_STRDUP)])
 AC_SUBST(INET_ATON)
 AC_SUBST(STRDUP)
 AC_CHECK_FUNC(cbrt, AC_DEFINE(HAVE_CBRT), AC_CHECK_LIB(m, cbrt, AC_DEFINE(HAVE_CBRT)))
diff --git a/src/include/config.h.in b/src/include/config.h.in
index 525015b70dacd57afd7b5f83c0b0d82ee9d503fd..2e1be342b1a823b875291e3e09a13d7b4f5e69b5 100644
--- a/src/include/config.h.in
+++ b/src/include/config.h.in
@@ -80,6 +80,9 @@
 /* Set to 1 if you have sigprocmask() */
 #undef HAVE_SIGPROCMASK
 
+/* Set to 1 if you have strdup() */
+#undef HAVE_STRDUP
+
 /* Set to 1 if you have libreadline.a */
 #undef HAVE_LIBREADLINE