--- a/gcc/config/darwin-c.c	Fri Oct 27 22:46:09 2017 +0900
+++ b/gcc/config/darwin-c.c	Thu Oct 25 07:37:49 2018 +0900
@@ -1,5 +1,5 @@
 /* Darwin support needed only by C/C++ frontends.
-   Copyright (C) 2001-2017 Free Software Foundation, Inc.
+   Copyright (C) 2001-2018 Free Software Foundation, Inc.
    Contributed by Apple Computer Inc.
 
 This file is part of GCC.
@@ -284,13 +284,13 @@
 
   frname = XNEWVEC (char, strlen (fname) + dir->len + 2
 		    + strlen(".framework/") + strlen("PrivateHeaders"));
-  strncpy (&frname[0], dir->name, dir->len);
+  memcpy (&frname[0], dir->name, dir->len);
   frname_len = dir->len;
   if (frname_len && frname[frname_len-1] != '/')
     frname[frname_len++] = '/';
-  strncpy (&frname[frname_len], fname, fname_len);
+  memcpy (&frname[frname_len], fname, fname_len);
   frname_len += fname_len;
-  strncpy (&frname[frname_len], ".framework/", strlen (".framework/"));
+  memcpy (&frname[frname_len], ".framework/", strlen (".framework/"));
   frname_len += strlen (".framework/");
 
   if (fast_dir == 0)
@@ -316,7 +316,7 @@
   /* Append framework_header_dirs and header file name */
   for (i = 0; framework_header_dirs[i].dirName; i++)
     {
-      strncpy (&frname[frname_len],
+      memcpy (&frname[frname_len],
 	       framework_header_dirs[i].dirName,
 	       framework_header_dirs[i].dirNameLen);
       strcpy (&frname[frname_len + framework_header_dirs[i].dirNameLen],
@@ -378,23 +378,23 @@
 
   sfrname_len = bufptr - pname;
 
-  strncpy (&sfrname[0], pname, sfrname_len);
+  memcpy (&sfrname[0], pname, sfrname_len);
 
-  strncpy (&sfrname[sfrname_len], "Frameworks/", strlen ("Frameworks/"));
+  memcpy (&sfrname[sfrname_len], "Frameworks/", strlen ("Frameworks/"));
   sfrname_len += strlen("Frameworks/");
 
-  strncpy (&sfrname[sfrname_len], fname, fname_len);
+  memcpy (&sfrname[sfrname_len], fname, fname_len);
   sfrname_len += fname_len;
 
-  strncpy (&sfrname[sfrname_len], ".framework/", strlen (".framework/"));
+  memcpy (&sfrname[sfrname_len], ".framework/", strlen (".framework/"));
   sfrname_len += strlen (".framework/");
 
   /* Append framework_header_dirs and header file name */
   for (i = 0; framework_header_dirs[i].dirName; i++)
     {
-      strncpy (&sfrname[sfrname_len],
-	       framework_header_dirs[i].dirName,
-	       framework_header_dirs[i].dirNameLen);
+      memcpy (&sfrname[sfrname_len],
+	      framework_header_dirs[i].dirName,
+	      framework_header_dirs[i].dirNameLen);
       strcpy (&sfrname[sfrname_len + framework_header_dirs[i].dirNameLen],
 	      &fname[fname_len]);