diff --git a/cpukit/ChangeLog b/cpukit/ChangeLog
index 00c4c0c62c..c509743e77 100644
--- a/cpukit/ChangeLog
+++ b/cpukit/ChangeLog
@@ -1,5 +1,6 @@
 2008-12-05	Ralf Corsépius <ralf.corsepius@rtems.org>
 
+	* configure.ac: Check for functions in newlib.
 	* posix/Makefile.am: Unconditionally compile files which now
           are in newlib.
 	* libcsupport/Makefile.am: Unconditionally compile files which now
diff --git a/cpukit/configure.ac b/cpukit/configure.ac
index a6d6f92858..4288faa32a 100644
--- a/cpukit/configure.ac
+++ b/cpukit/configure.ac
@@ -52,11 +52,18 @@ AC_CHECK_FUNCS([strdup strndup strncasecmp])
 AC_CHECK_FUNCS([bcopy bcmp])
 AC_CHECK_FUNCS([isascii fileno])
 
-# Newlib's posix directory
-AC_CHECK_FUNCS([opendir closedir readdir rewinddir scandir seekdir telldir isatty])
+# <FIXME>
+#   Check for functions supplied by newlib >= 1.17.0
+# Newlib's posix/ directory
+AC_CHECK_FUNCS([sleep usleep \
+  opendir closedir readdir readdir_r \
+  rewinddir scandir seekdir telldir isatty])
+AC_CHECK_FUNCS([execl execlp execle execv execvp execve])
+AC_CHECK_FUNCS([regcomp regexec regerror regfree])
 
 # Newlib's unix/ directory
 AC_CHECK_FUNCS([ttyname getcwd])
+# </FIXME>
 
 ## Check if the installed toolchain has these headers
 AC_CHECK_HEADER([tar.h])