Index: gcc/builtins.c
--- gcc/builtins.c.orig
+++ gcc/builtins.c
@@ -138,10 +138,12 @@ static rtx expand_builtin_memory_copy_args (tree dest,
 static rtx expand_builtin_memmove (tree, rtx);
 static rtx expand_builtin_mempcpy (tree, rtx);
 static rtx expand_builtin_mempcpy_args (tree, tree, tree, rtx, tree, memop_ret);
+#ifndef NO_UNSAFE_BUILTINS
 static rtx expand_builtin_strcat (tree);
 static rtx expand_builtin_strcpy (tree, rtx);
 static rtx expand_builtin_strcpy_args (tree, tree, tree, rtx);
 static rtx expand_builtin_stpcpy (tree, rtx, machine_mode);
+#endif
 static rtx expand_builtin_stpncpy (tree, rtx);
 static rtx expand_builtin_strncat (tree, rtx);
 static rtx expand_builtin_strncpy (tree, rtx);
@@ -6133,6 +6135,7 @@ expand_builtin_mempcpy_args (tree dest, tree src, tree
 					  retmode, false);
 }
 
+#ifndef NO_UNSAFE_BUILTINS
 /* Expand into a movstr instruction, if one is available.  Return NULL_RTX if
    we failed, the caller should emit a normal call, otherwise try to
    get the result in TARGET, if convenient.
@@ -6382,6 +6385,7 @@ expand_builtin_stpcpy (tree exp, rtx target, machine_m
 
   return NULL_RTX;
 }
+#endif
 
 /* Check a call EXP to the stpncpy built-in for validity.
    Return NULL_RTX on both success and failure.  */
@@ -9914,9 +9918,11 @@ expand_builtin (tree exp, rtx target, rtx subtarget, m
       break;
 
     case BUILT_IN_STRCAT:
+#ifndef NO_UNSAFE_BUILTINS
       target = expand_builtin_strcat (exp);
       if (target)
 	return target;
+#endif
       break;
 
     case BUILT_IN_GETTEXT:
@@ -9959,9 +9965,11 @@ expand_builtin (tree exp, rtx target, rtx subtarget, m
       break;
 
     case BUILT_IN_STRCPY:
+#ifndef NO_UNSAFE_BUILTINS
       target = expand_builtin_strcpy (exp, target);
       if (target)
 	return target;
+#endif
       break;
 
     case BUILT_IN_STRNCAT:
@@ -9977,9 +9985,11 @@ expand_builtin (tree exp, rtx target, rtx subtarget, m
       break;
 
     case BUILT_IN_STPCPY:
+#ifndef NO_UNSAFE_BUILTINS
       target = expand_builtin_stpcpy (exp, target, mode);
       if (target)
 	return target;
+#endif
       break;
 
     case BUILT_IN_STPNCPY: