--- a/configure.ac
+++ b/configure.ac
@@ -227,6 +227,7 @@ AC_COMPILE_IFELSE(  [AC_LANG_PROGRAM([[#
                       AC_DEFINE_UNQUOTED([HAVE_MBRLEN], 0, [Define to 1 if you have the `mbrlen' function.])
                     ]
                  )
+AC_CHECK_FUNC([wcsrtombs],[
 AC_MSG_CHECKING([for wcsrtombs])
 AC_RUN_IFELSE(  [AC_LANG_PROGRAM([[#include <wchar.h>
 #include <string.h>]],
@@ -269,8 +270,17 @@ else
                           AC_MSG_RESULT([no])
                           AC_DEFINE_UNQUOTED([HAVE_WCSRTOMBS], 0, [Define to 1 if you have the `wcsrtombs' function.])
                         ])
+                    ],
+                    [
+                      AC_MSG_RESULT([cross. guessing yes])
+                      AC_DEFINE_UNQUOTED([HAVE_WCSRTOMBS], 1, [Define to 1 if you have the `wcsrtombs' function.])
                     ]
                  )
+],
+[
+  AC_DEFINE_UNQUOTED([HAVE_WCSRTOMBS], 0, [Define to 1 if you have the `wcsrtombs' function.])
+])
+AC_CHECK_FUNC([mbsrtowcs],[
 AC_MSG_CHECKING([for mbsrtowcs])
 AC_RUN_IFELSE(  [AC_LANG_PROGRAM([[#include <wchar.h>
 #include <string.h>]],
@@ -313,8 +323,16 @@ else
                         AC_MSG_RESULT([no])
                         AC_DEFINE_UNQUOTED([HAVE_MBSRTOWCS], 0, [Define to 1 if you have the `mbsrtowcs' function.])
                       ])
-                    ] 
+                    ],
+                    [
+                      AC_MSG_RESULT([cross. guessing yes])
+                      AC_DEFINE_UNQUOTED([HAVE_MBSRTOWCS], 1, [Define to 1 if you have the `mbsrtowcs' function.])
+                    ]
                  )
+],
+[
+  AC_DEFINE_UNQUOTED([HAVE_MBSRTOWCS], 0, [Define to 1 if you have the `mbsrtowcs' function.])
+])
 
 AC_MSG_CHECKING([if iconv uses const pointers])
 AC_COMPILE_IFELSE(  [AC_LANG_PROGRAM([[#include <iconv.h>]],