diff --git a/autoconf/configure.ac b/autoconf/configure.ac
index 0fad0356929..e295b878780 100644
--- a/autoconf/configure.ac
+++ b/autoconf/configure.ac
@@ -409,7 +409,8 @@ dnl=== SECTION 8: Check for specific functions needed
 dnl===
 dnl===-----------------------------------------------------------------------===
 
-AC_CHECK_FUNCS([backtrace getcwd gettimeofday isatty getrusage mkstemp]) 
+AC_CHECK_FUNCS([backtrace getcwd gettimeofday isatty getrusage mkstemp mktemp
+                mkdtemp realpath]) 
 AC_CHECK_FUNCS([strdup strtoq strtoll])
 AC_C_PRINTF_A
 AC_FUNC_ALLOCA
diff --git a/configure b/configure
index 4741b5f358f..1b47b619af9 100755
--- a/configure
+++ b/configure
@@ -26617,7 +26617,11 @@ fi
 
 
 
-for ac_func in backtrace getcwd gettimeofday isatty getrusage mkstemp
+
+
+
+for ac_func in backtrace getcwd gettimeofday isatty getrusage mkstemp mktemp
+                mkdtemp realpath
 do
 as_ac_var=`echo "ac_cv_func_$ac_func" | $as_tr_sh`
 echo "$as_me:$LINENO: checking for $ac_func" >&5
diff --git a/include/llvm/Config/config.h.in b/include/llvm/Config/config.h.in
index 8f682d34bee..0d0a0780495 100644
--- a/include/llvm/Config/config.h.in
+++ b/include/llvm/Config/config.h.in
@@ -179,9 +179,15 @@
 /* Define to 1 if you have the <memory.h> header file. */
 #undef HAVE_MEMORY_H
 
+/* Define to 1 if you have the `mkdtemp' function. */
+#undef HAVE_MKDTEMP
+
 /* Define to 1 if you have the `mkstemp' function. */
 #undef HAVE_MKSTEMP
 
+/* Define to 1 if you have the `mktemp' function. */
+#undef HAVE_MKTEMP
+
 /* Define to 1 if you have a working `mmap' system call. */
 #undef HAVE_MMAP
 
@@ -216,6 +222,9 @@
 /* Define to 1 if you have the `readdir' function. */
 #undef HAVE_READDIR
 
+/* Define to 1 if you have the `realpath' function. */
+#undef HAVE_REALPATH
+
 /* Define to 1 if you have the `rindex' function. */
 #undef HAVE_RINDEX