diff --git a/config.h.in b/config.h.in
index ce254b8..bbe3490 100644
--- a/config.h.in
+++ b/config.h.in
@@ -381,6 +381,9 @@
 /* Define if you have the readlink function.  */
 #undef HAVE_READLINK
 
+/* Define if you have the rint function.  */
+#undef HAVE_RINT
+
 /* Define if you have the select function.  */
 #undef HAVE_SELECT
 
diff --git a/configure b/configure
index 581c8a4..b59e5cc 100755
--- a/configure
+++ b/configure
@@ -1,6 +1,6 @@
 #! /bin/sh
 
-# From configure.in Revision: 1.120 
+# From configure.in Revision: 1.121 
 
 # Guess values for system-dependent variables and create Makefiles.
 # Generated automatically using autoconf version 2.13 
@@ -5003,9 +5003,69 @@
 
 LIBS=$LIBS_SAVE
 
+# check for rint() in math library
+LIBS_SAVE=$LIBS
+LIBS="$LIBS $LIBM"
+for ac_func in rint
+do
+echo $ac_n "checking for $ac_func""... $ac_c" 1>&6
+echo "configure:5013: checking for $ac_func" >&5
+if eval "test \"`echo '$''{'ac_cv_func_$ac_func'+set}'`\" = set"; then
+  echo $ac_n "(cached) $ac_c" 1>&6
+else
+  cat > conftest.$ac_ext <<EOF
+#line 5018 "configure"
+#include "confdefs.h"
+/* System header to define __stub macros and hopefully few prototypes,
+    which can conflict with char $ac_func(); below.  */
+#include <assert.h>
+/* Override any gcc2 internal prototype to avoid an error.  */
+/* We use char because int might match the return type of a gcc2
+    builtin and then its argument prototype would still apply.  */
+char $ac_func();
+
+int main() {
+
+/* The GNU C library defines this for functions which it implements
+    to always fail with ENOSYS.  Some functions are actually named
+    something starting with __ and the normal name is an alias.  */
+#if defined (__stub_$ac_func) || defined (__stub___$ac_func)
+choke me
+#else
+$ac_func();
+#endif
+
+; return 0; }
+EOF
+if { (eval echo configure:5041: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+  rm -rf conftest*
+  eval "ac_cv_func_$ac_func=yes"
+else
+  echo "configure: failed program was:" >&5
+  cat conftest.$ac_ext >&5
+  rm -rf conftest*
+  eval "ac_cv_func_$ac_func=no"
+fi
+rm -f conftest*
+fi
+
+if eval "test \"`echo '$ac_cv_func_'$ac_func`\" = yes"; then
+  echo "$ac_t""yes" 1>&6
+    ac_tr_func=HAVE_`echo $ac_func | tr 'abcdefghijklmnopqrstuvwxyz' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'`
+  cat >> confdefs.h <<EOF
+#define $ac_tr_func 1
+EOF
+ 
+else
+  echo "$ac_t""no" 1>&6
+fi
+done
+
+LIBS=$LIBS_SAVE
+
 # check for getopt
 echo $ac_n "checking for genuine getopt""... $ac_c" 1>&6
-echo "configure:5009: checking for genuine getopt" >&5
+echo "configure:5069: checking for genuine getopt" >&5
 if eval "test \"`echo '$''{'ac_cv_func_getopt'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -5013,7 +5073,7 @@
   ac_cv_func_getopt=no
 else
   cat > conftest.$ac_ext <<EOF
-#line 5017 "configure"
+#line 5077 "configure"
 #include "confdefs.h"
 #include <stdio.h>
 extern int optind, opterr, getopt();
@@ -5025,7 +5085,7 @@
 	exit(0);
 }
 EOF
-if { (eval echo configure:5029: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
+if { (eval echo configure:5089: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
 then
   ac_cv_func_getopt=yes
 else
@@ -5043,7 +5103,7 @@
 
 # check whether malloc(0) returns NULL or not
 echo $ac_n "checking what malloc(0) returns""... $ac_c" 1>&6
-echo "configure:5047: checking what malloc(0) returns" >&5
+echo "configure:5107: checking what malloc(0) returns" >&5
 if eval "test \"`echo '$''{'ac_cv_malloc_zero'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -5051,7 +5111,7 @@
     { echo "configure: error: can not run test program while cross compiling" 1>&2; exit 1; }
 else
   cat > conftest.$ac_ext <<EOF
-#line 5055 "configure"
+#line 5115 "configure"
 #include "confdefs.h"
 #include <stdio.h>
 #ifdef HAVE_STDLIB
@@ -5070,7 +5130,7 @@
 	exit(0);
 }
 EOF
-if { (eval echo configure:5074: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
+if { (eval echo configure:5134: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
 then
   ac_cv_malloc_zero=nonnull
 else
@@ -5096,17 +5156,17 @@
 # check for wchar.h
 ac_safe=`echo "wchar.h" | sed 'y%./+-%__p_%'`
 echo $ac_n "checking for wchar.h""... $ac_c" 1>&6
-echo "configure:5100: checking for wchar.h" >&5
+echo "configure:5160: checking for wchar.h" >&5
 if eval "test \"`echo '$''{'ac_cv_header_$ac_safe'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 5105 "configure"
+#line 5165 "configure"
 #include "confdefs.h"
 #include <wchar.h>
 EOF
 ac_try="$ac_cpp conftest.$ac_ext >/dev/null 2>conftest.out"
-{ (eval echo configure:5110: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
+{ (eval echo configure:5170: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
 ac_err=`grep -v '^ *+' conftest.out | grep -v "^conftest.${ac_ext}\$"`
 if test -z "$ac_err"; then
   rm -rf conftest*
@@ -5136,12 +5196,12 @@
 # check for usable wchar_t
 usable_wchar_t="unkown"
 echo $ac_n "checking for usable wchar_t""... $ac_c" 1>&6
-echo "configure:5140: checking for usable wchar_t" >&5
+echo "configure:5200: checking for usable wchar_t" >&5
 if test "$cross_compiling" = yes; then
     { echo "configure: error: can not run test program while cross compiling" 1>&2; exit 1; }
 else
   cat > conftest.$ac_ext <<EOF
-#line 5145 "configure"
+#line 5205 "configure"
 #include "confdefs.h"
 
 #include "wchar.h"
@@ -5155,7 +5215,7 @@
 }
 
 EOF
-if { (eval echo configure:5159: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
+if { (eval echo configure:5219: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
 then
   cat >> confdefs.h <<\EOF
 #define HAVE_USABLE_WCHAR_T 1
@@ -5174,14 +5234,14 @@
 
 # check for endianness
 echo $ac_n "checking whether byte ordering is bigendian""... $ac_c" 1>&6
-echo "configure:5178: checking whether byte ordering is bigendian" >&5
+echo "configure:5238: checking whether byte ordering is bigendian" >&5
 if eval "test \"`echo '$''{'ac_cv_c_bigendian'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   ac_cv_c_bigendian=unknown
 # See if sys/param.h defines the BYTE_ORDER macro.
 cat > conftest.$ac_ext <<EOF
-#line 5185 "configure"
+#line 5245 "configure"
 #include "confdefs.h"
 #include <sys/types.h>
 #include <sys/param.h>
@@ -5192,11 +5252,11 @@
 #endif
 ; return 0; }
 EOF
-if { (eval echo configure:5196: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+if { (eval echo configure:5256: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
   rm -rf conftest*
   # It does; now see whether it defined to BIG_ENDIAN or not.
 cat > conftest.$ac_ext <<EOF
-#line 5200 "configure"
+#line 5260 "configure"
 #include "confdefs.h"
 #include <sys/types.h>
 #include <sys/param.h>
@@ -5207,7 +5267,7 @@
 #endif
 ; return 0; }
 EOF
-if { (eval echo configure:5211: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+if { (eval echo configure:5271: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
   rm -rf conftest*
   ac_cv_c_bigendian=yes
 else
@@ -5227,7 +5287,7 @@
     { echo "configure: error: can not run test program while cross compiling" 1>&2; exit 1; }
 else
   cat > conftest.$ac_ext <<EOF
-#line 5231 "configure"
+#line 5291 "configure"
 #include "confdefs.h"
 main () {
   /* Are we little or big endian?  From Harbison&Steele.  */
@@ -5240,7 +5300,7 @@
   exit (u.c[sizeof (long) - 1] == 1);
 }
 EOF
-if { (eval echo configure:5244: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
+if { (eval echo configure:5304: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
 then
   ac_cv_c_bigendian=no
 else
@@ -5266,7 +5326,7 @@
 
 # Check for --with-wctype-functions
 echo $ac_n "checking for --with-wctype-functions""... $ac_c" 1>&6
-echo "configure:5270: checking for --with-wctype-functions" >&5
+echo "configure:5330: checking for --with-wctype-functions" >&5
 # Check whether --with-wctype-functions or --without-wctype-functions was given.
 if test "${with_wctype_functions+set}" = set; then
   withval="$with_wctype_functions"
diff --git a/configure.in b/configure.in
index 6a846a2..99d3eec 100644
--- a/configure.in
+++ b/configure.in
@@ -996,6 +996,12 @@
 AC_REPLACE_FUNCS(hypot)
 LIBS=$LIBS_SAVE
 
+# check for rint() in math library
+LIBS_SAVE=$LIBS
+LIBS="$LIBS $LIBM"
+AC_CHECK_FUNCS(rint)
+LIBS=$LIBS_SAVE
+
 # check for getopt
 AC_MSG_CHECKING(for genuine getopt)
 AC_CACHE_VAL(ac_cv_func_getopt,