diff -Naur gcc-4.9.2-orig/libiberty/aclocal.m4 gcc-4.9.2/libiberty/aclocal.m4
--- gcc-4.9.2-orig/libiberty/aclocal.m4	2011-12-20 11:08:30.000000000 +0300
+++ gcc-4.9.2/libiberty/aclocal.m4	2014-11-04 00:37:02.428600000 +0300
@@ -15,6 +15,8 @@
 /* Test by Jim Wilson and Kaveh Ghazi.
    Check whether strncmp reads past the end of its string parameters. */
 #include <sys/types.h>
+#include <string.h>
+#include <stdlib.h>
 
 #ifdef HAVE_FCNTL_H
 #include <fcntl.h>
@@ -147,7 +149,9 @@
 fi
 
 AC_CACHE_CHECK(stack direction for C alloca, ac_cv_c_stack_direction,
-[AC_TRY_RUN([find_stack_direction ()
+[AC_TRY_RUN([
+#include <stdlib.h>
+find_stack_direction ()
 {
   static char *addr = 0;
   auto char dummy;
diff -Naur gcc-4.9.2-orig/libiberty/configure gcc-4.9.2/libiberty/configure
--- gcc-4.9.2-orig/libiberty/configure	2014-01-06 21:15:31.000000000 +0300
+++ gcc-4.9.2/libiberty/configure	2014-11-04 00:37:02.444200000 +0300
@@ -6077,6 +6077,7 @@
 else
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
+#include <stdlib.h>
 find_stack_direction ()
 {
   static char *addr = 0;
@@ -6846,6 +6847,8 @@
 /* Test by Jim Wilson and Kaveh Ghazi.
    Check whether strncmp reads past the end of its string parameters. */
 #include <sys/types.h>
+#include <string.h>
+#include <stdlib.h>
 
 #ifdef HAVE_FCNTL_H
 #include <fcntl.h>