--- a/gcc/cp/Make-lang.in
+++ b/gcc/cp/Make-lang.in
@@ -111,7 +111,7 @@ else
 # deleting the $(srcdir)/cp/cfns.h file.
 $(srcdir)/cp/cfns.h:
 endif
-	gperf -o -C -E -k '1-6,$$' -j1 -D -N 'libc_name_p' -L ANSI-C \
+	gperf -o -C -E -k '1-6,$$' -j1 -D -N 'libc_name_p' -L C++ \
 		$(srcdir)/cp/cfns.gperf --output-file $(srcdir)/cp/cfns.h
 
 #
--- a/gcc/cp/cfns.gperf
+++ b/gcc/cp/cfns.gperf
@@ -1,3 +1,5 @@
+%language=C++
+%define class-name libc_name
 %{
 /* Copyright (C) 2000-2015 Free Software Foundation, Inc.
 
@@ -16,14 +18,6 @@ for more details.
 You should have received a copy of the GNU General Public License
 along with GCC; see the file COPYING3.  If not see
 <http://www.gnu.org/licenses/>.  */
-#ifdef __GNUC__
-__inline
-#endif
-static unsigned int hash (const char *, unsigned int);
-#ifdef __GNUC__
-__inline
-#endif
-const char * libc_name_p (const char *, unsigned int);
 %}
 %%
 # The standard C library functions, for feeding to gperf; the result is used
--- a/gcc/cp/cfns.h
+++ b/gcc/cp/cfns.h
@@ -28,7 +28,7 @@
 #error "gperf generated tables don't work with this execution character set. Please report a bug to <bug-gnu-gperf@gnu.org>."
 #endif
 
-#line 1 "cfns.gperf"
+#line 3 "cfns.gperf"
 
 /* Copyright (C) 2000-2015 Free Software Foundation, Inc.
 
@@ -47,25 +47,18 @@ for more details.
 You should have received a copy of the GNU General Public License
 along with GCC; see the file COPYING3.  If not see
 <http://www.gnu.org/licenses/>.  */
-#ifdef __GNUC__
-__inline
-#endif
-static unsigned int hash (const char *, unsigned int);
-#ifdef __GNUC__
-__inline
-#endif
-const char * libc_name_p (const char *, unsigned int);
 /* maximum key range = 391, duplicates = 0 */
 
-#ifdef __GNUC__
-__inline
-#else
-#ifdef __cplusplus
-inline
-#endif
-#endif
-static unsigned int
-hash (register const char *str, register unsigned int len)
+class libc_name
+{
+private:
+  static inline unsigned int hash (const char *str, unsigned int len);
+public:
+  static const char *libc_name_p (const char *str, unsigned int len);
+};
+
+inline unsigned int
+libc_name::hash (register const char *str, register unsigned int len)
 {
   static const unsigned short asso_values[] =
     {
@@ -122,14 +115,8 @@ hash (register const char *str, register
   return hval + asso_values[(unsigned char)str[len - 1]];
 }
 
-#ifdef __GNUC__
-__inline
-#ifdef __GNUC_STDC_INLINE__
-__attribute__ ((__gnu_inline__))
-#endif
-#endif
 const char *
-libc_name_p (register const char *str, register unsigned int len)
+libc_name::libc_name_p (register const char *str, register unsigned int len)
 {
   enum
     {
--- a/gcc/cp/except.c
+++ b/gcc/cp/except.c
@@ -1040,7 +1040,8 @@ nothrow_libfn_p (const_tree fn)
      unless the system headers are playing rename tricks, and if
      they are, we don't want to be confused by them.  */
   id = DECL_NAME (fn);
-  return !!libc_name_p (IDENTIFIER_POINTER (id), IDENTIFIER_LENGTH (id));
+  return !!libc_name::libc_name_p (IDENTIFIER_POINTER (id),
+				   IDENTIFIER_LENGTH (id));
 }
 
 /* Returns nonzero if an exception of type FROM will be caught by a