diff --git a/gcc/c/c-objc-common.c b/gcc/c/c-objc-common.c
index 8f4d3eb..6d923eb 100644
--- a/gcc/c/c-objc-common.c
+++ b/gcc/c/c-objc-common.c
@@ -29,7 +29,7 @@ along with GCC; see the file COPYING3.  If not see
 #include "c-objc-common.h"
 
 static bool c_tree_printer (pretty_printer *, text_info *, const char *,
-			    int, bool, bool, bool, bool, const char **);
+			    int, bool, bool, bool, bool *, const char **);
 
 bool
 c_missing_noreturn_ok_p (tree decl)
@@ -79,7 +79,7 @@ c_objc_common_init (void)
 static bool
 c_tree_printer (pretty_printer *pp, text_info *text, const char *spec,
 		int precision, bool wide, bool set_locus, bool hash,
-		bool, const char **)
+		bool *quoted, const char **)
 {
   tree t = NULL_TREE;
   tree name;
@@ -166,12 +166,20 @@ c_tree_printer (pretty_printer *pp, text_info *text, const char *spec,
 	      return true;
 
 	    /* They're not, print the stripped version now.  */
+	    if (*quoted)
+	      pp_end_quote (pp, pp_show_color (pp));
 	    pp_c_whitespace (cpp);
 	    pp_left_brace (cpp);
 	    pp_c_ws_string (cpp, _("aka"));
 	    pp_c_whitespace (cpp);
+	    if (*quoted)
+	      pp_begin_quote (pp, pp_show_color (pp));
 	    cpp->type_id (TYPE_CANONICAL (t));
+	    if (*quoted)
+	      pp_end_quote (pp, pp_show_color (pp));
 	    pp_right_brace (cpp);
+	    /* No further closing quotes are needed.  */
+	    *quoted = false;
 	  }
 	return true;
       }
diff --git a/gcc/cp/error.c b/gcc/cp/error.c
index 6d1f3da..a47822a 100644
--- a/gcc/cp/error.c
+++ b/gcc/cp/error.c
@@ -57,7 +57,7 @@ static const char *expr_to_string (tree);
 static const char *fndecl_to_string (tree, int);
 static const char *op_to_string	(bool, enum tree_code);
 static const char *parm_to_string (int);
-static const char *type_to_string (tree, int);
+static const char *type_to_string (tree, int, bool, bool *, bool);
 
 static void dump_alias_template_specialization (cxx_pretty_printer *, tree, int);
 static void dump_type (cxx_pretty_printer *, tree, int);
@@ -99,7 +99,7 @@ static void cp_diagnostic_starter (diagnostic_context *, diagnostic_info *);
 static void cp_print_error_function (diagnostic_context *, diagnostic_info *);
 
 static bool cp_printer (pretty_printer *, text_info *, const char *,
-			int, bool, bool, bool, bool, const char **);
+			int, bool, bool, bool, bool *, const char **);
 
 /* Struct for handling %H or %I, which require delaying printing the
    type until a postprocessing stage.  */
@@ -3144,8 +3144,28 @@ op_to_string (bool assop, enum tree_code p)
   return id ? IDENTIFIER_POINTER (id) : M_("<unknown>");
 }
 
+/* Return a GC-allocated representation of type TYP, with verbosity VERBOSE.
+
+   If QUOTE is non-NULL and if *QUOTE is true, then quotes are added to the
+   string in appropriate places, and *QUOTE is written to with false
+   to suppress pp_format's trailing close quote so that e.g.
+     foo_typedef {aka underlying_foo} {enum}
+   can be printed by "%qT" as:
+     `foo_typedef' {aka `underlying_foo'} {enum}
+   rather than:
+     `foo_typedef {aka underlying_foo} {enum}'
+   When adding such quotes, if POSTPROCESSED is true (for handling %H and %I)
+   then a leading open quote will be added, whereas if POSTPROCESSED is false
+   (for handling %T) then any leading quote has already been added by
+   pp_format, or is not needed due to QUOTE being NULL (for template arguments
+   within %H and %I).
+
+   SHOW_COLOR is used to determine the colorization of any quotes that
+   are added.  */
+
 static const char *
-type_to_string (tree typ, int verbose)
+type_to_string (tree typ, int verbose, bool postprocessed, bool *quote,
+		bool show_color)
 {
   int flags = 0;
   if (verbose)
@@ -3153,7 +3173,19 @@ type_to_string (tree typ, int verbose)
   flags |= TFF_TEMPLATE_HEADER;
 
   reinit_cxx_pp ();
+
+  if (postprocessed && quote && *quote)
+    pp_begin_quote (cxx_pp, show_color);
+
+  struct obstack *ob = pp_buffer (cxx_pp)->obstack;
+  int type_start, type_len;
+  type_start = obstack_object_size (ob);
+
   dump_type (cxx_pp, typ, flags);
+
+  /* Remember the end of the initial dump.  */
+  type_len = obstack_object_size (ob) - type_start;
+
   /* If we're printing a type that involves typedefs, also print the
      stripped version.  But sometimes the stripped version looks
      exactly the same, so we don't want it after all.  To avoid printing
@@ -3162,21 +3194,44 @@ type_to_string (tree typ, int verbose)
       && !uses_template_parms (typ))
     {
       int aka_start, aka_len; char *p;
-      struct obstack *ob = pp_buffer (cxx_pp)->obstack;
-      /* Remember the end of the initial dump.  */
-      int len = obstack_object_size (ob);
       tree aka = strip_typedefs (typ);
+      if (quote && *quote)
+	pp_end_quote (cxx_pp, show_color);
       pp_string (cxx_pp, " {aka");
       pp_cxx_whitespace (cxx_pp);
+      if (quote && *quote)
+	pp_begin_quote (cxx_pp, show_color);
       /* And remember the start of the aka dump.  */
       aka_start = obstack_object_size (ob);
       dump_type (cxx_pp, aka, flags);
       aka_len = obstack_object_size (ob) - aka_start;
+      if (quote && *quote)
+	pp_end_quote (cxx_pp, show_color);
       pp_right_brace (cxx_pp);
       p = (char*)obstack_base (ob);
-      /* If they are identical, cut off the aka with a NUL.  */
-      if (len == aka_len && memcmp (p, p+aka_start, len) == 0)
-	p[len] = '\0';
+      /* If they are identical, cut off the aka by unwinding the obstack.  */
+      if (type_len == aka_len
+	  && memcmp (p + type_start, p+aka_start, type_len) == 0)
+	{
+	  /* We can't add a '\0' here, since we may be adding a closing quote
+	     below, and it would be hidden by the '\0'.
+	     Instead, manually unwind the current object within the obstack
+	     so that the insertion point is at the end of the type, before
+	     the "' {aka".  */
+	  int delta = type_start + type_len - obstack_object_size (ob);
+	  gcc_assert (delta <= 0);
+	  obstack_blank_fast (ob, delta);
+	}
+      else
+	if (quote)
+	  /* No further closing quotes are needed.  */
+	  *quote = false;
+    }
+
+  if (quote && *quote)
+    {
+      pp_end_quote (cxx_pp, show_color);
+      *quote = false;
     }
   return pp_ggc_formatted_text (cxx_pp);
 }
@@ -3634,7 +3689,7 @@ static const char *
 arg_to_string (tree arg, bool verbose)
 {
   if (TYPE_P (arg))
-    return type_to_string (arg, verbose);
+    return type_to_string (arg, verbose, true, NULL, false);
   else
     return expr_to_string (arg);
 }
@@ -3924,10 +3979,13 @@ cxx_format_postprocessor::handle (pretty_printer *pp)
 	}
       else
 	{
-	  /* If the types were not comparable, they are printed normally,
-	     and no difference tree is printed.  */
-	  type_a_text = type_to_string (type_a.m_tree, type_a.m_verbose);
-	  type_b_text = type_to_string (type_b.m_tree, type_b.m_verbose);
+	  /* If the types were not comparable (or if only one of %H/%I was
+	     provided), they are printed normally, and no difference tree
+	     is printed.  */
+	  type_a_text = type_to_string (type_a.m_tree, type_a.m_verbose,
+					true, &type_a.m_quote, show_color);
+	  type_b_text = type_to_string (type_b.m_tree, type_b.m_verbose,
+					true, &type_b.m_quote, show_color);
 	}
 
       if (type_a.m_quote)
@@ -4000,7 +4058,7 @@ defer_phase_2_of_type_diff (deferred_printed_type *deferred,
 static bool
 cp_printer (pretty_printer *pp, text_info *text, const char *spec,
 	    int precision, bool wide, bool set_locus, bool verbose,
-	    bool quoted, const char **buffer_ptr)
+	    bool *quoted, const char **buffer_ptr)
 {
   gcc_assert (pp->m_format_postprocessor);
   cxx_format_postprocessor *postprocessor
@@ -4043,7 +4101,12 @@ cp_printer (pretty_printer *pp, text_info *text, const char *spec,
     case 'P': result = parm_to_string (next_int);		break;
     case 'Q': result = op_to_string (true, next_tcode);		break;
     case 'S': result = subst_to_string (next_tree);		break;
-    case 'T': result = type_to_string (next_tree, verbose);	break;
+    case 'T':
+      {
+	result = type_to_string (next_tree, verbose, false, quoted,
+				 pp_show_color (pp));
+      }
+      break;
     case 'V': result = cv_to_string (next_tree, verbose);	break;
     case 'X': result = eh_spec_to_string (next_tree, verbose);  break;
 
@@ -4059,14 +4122,14 @@ cp_printer (pretty_printer *pp, text_info *text, const char *spec,
     case 'H':
       {
 	defer_phase_2_of_type_diff (&postprocessor->m_type_a, next_tree,
-				    buffer_ptr, verbose, quoted);
+				    buffer_ptr, verbose, *quoted);
 	return true;
       }
 
     case 'I':
       {
 	defer_phase_2_of_type_diff (&postprocessor->m_type_b, next_tree,
-				    buffer_ptr, verbose, quoted);
+				    buffer_ptr, verbose, *quoted);
 	return true;
       }
 
diff --git a/gcc/fortran/error.c b/gcc/fortran/error.c
index 3ad1cf9..2cece49 100644
--- a/gcc/fortran/error.c
+++ b/gcc/fortran/error.c
@@ -918,7 +918,7 @@ gfc_notify_std (int std, const char *gmsgid, ...)
 static bool
 gfc_format_decoder (pretty_printer *pp, text_info *text, const char *spec,
 		    int precision, bool wide, bool set_locus, bool hash,
-		    bool quoted, const char **buffer_ptr)
+		    bool *quoted, const char **buffer_ptr)
 {
   switch (*spec)
     {
diff --git a/gcc/pretty-print.c b/gcc/pretty-print.c
index e66d898..1fbd2fe 100644
--- a/gcc/pretty-print.c
+++ b/gcc/pretty-print.c
@@ -1209,10 +1209,7 @@ pp_format (pretty_printer *pp, text_info *text)
       gcc_assert (!wide || precision == 0);
 
       if (quote)
-	{
-	  pp_string (pp, open_quote);
-	  pp_string (pp, colorize_start (pp_show_color (pp), "quote"));
-	}
+	pp_begin_quote (pp, pp_show_color (pp));
 
       switch (*p)
 	{
@@ -1345,19 +1342,21 @@ pp_format (pretty_printer *pp, text_info *text)
 	  {
 	    bool ok;
 
+	    /* Call the format decoder.
+	       Pass the address of "quote" so that format decoders can
+	       potentially disable printing of the closing quote
+	       (e.g. when printing "'TYPEDEF' aka 'TYPE'" in the C family
+	       of frontends).  */
 	    gcc_assert (pp_format_decoder (pp));
 	    ok = pp_format_decoder (pp) (pp, text, p,
-					 precision, wide, plus, hash, quote,
+					 precision, wide, plus, hash, &quote,
 					 formatters[argno]);
 	    gcc_assert (ok);
 	  }
 	}
 
       if (quote)
-	{
-	  pp_string (pp, colorize_stop (pp_show_color (pp)));
-	  pp_string (pp, close_quote);
-	}
+	pp_end_quote (pp, pp_show_color (pp));
 
       obstack_1grow (&buffer->chunk_obstack, '\0');
       *formatters[argno] = XOBFINISH (&buffer->chunk_obstack, const char *);
@@ -1731,6 +1730,26 @@ pp_separate_with (pretty_printer *pp, char c)
   pp_space (pp);
 }
 
+/* Add a localized open quote, and if SHOW_COLOR is true, begin colorizing
+   using the "quote" color.  */
+
+void
+pp_begin_quote (pretty_printer *pp, bool show_color)
+{
+  pp_string (pp, open_quote);
+  pp_string (pp, colorize_start (show_color, "quote"));
+}
+
+/* If SHOW_COLOR is true, stop colorizing.
+   Add a localized close quote.  */
+
+void
+pp_end_quote (pretty_printer *pp, bool show_color)
+{
+  pp_string (pp, colorize_stop (show_color));
+  pp_string (pp, close_quote);
+}
+
 
 /* The string starting at P has LEN (at least 1) bytes left; if they
    start with a valid UTF-8 sequence, return the length of that
diff --git a/gcc/pretty-print.h b/gcc/pretty-print.h
index 98296b1..9f6e2bb 100644
--- a/gcc/pretty-print.h
+++ b/gcc/pretty-print.h
@@ -179,7 +179,7 @@ struct pp_wrapping_mode_t
    A client-supplied formatter returns true if everything goes well,
    otherwise it returns false.  */
 typedef bool (*printer_fn) (pretty_printer *, text_info *, const char *,
-			    int, bool, bool, bool, bool, const char **);
+			    int, bool, bool, bool, bool *, const char **);
 
 /* Client supplied function used to decode formats.  */
 #define pp_format_decoder(PP) (PP)->format_decoder
@@ -386,6 +386,9 @@ extern void pp_write_text_to_stream (pretty_printer *);
 extern void pp_write_text_as_dot_label_to_stream (pretty_printer *, bool);
 extern void pp_maybe_space (pretty_printer *);
 
+extern void pp_begin_quote (pretty_printer *, bool);
+extern void pp_end_quote (pretty_printer *, bool);
+
 /* Switch into verbatim mode and return the old mode.  */
 static inline pp_wrapping_mode_t
 pp_set_verbatim_wrapping_ (pretty_printer *pp)
diff --git a/gcc/testsuite/g++.dg/diagnostic/aka1.C b/gcc/testsuite/g++.dg/diagnostic/aka1.C
index 37f8df9..cb314fb 100644
--- a/gcc/testsuite/g++.dg/diagnostic/aka1.C
+++ b/gcc/testsuite/g++.dg/diagnostic/aka1.C
@@ -12,4 +12,4 @@ void A::f() {
 typedef A B;
 
 // We do want an aka for a real typedef.
-B b = 0;			// { dg-error "B .aka A." }
+B b = 0;			// { dg-error "'B' {aka 'A'}" }
diff --git a/gcc/testsuite/g++.dg/diagnostic/aka2.C b/gcc/testsuite/g++.dg/diagnostic/aka2.C
new file mode 100644
index 0000000..a43f9e3
--- /dev/null
+++ b/gcc/testsuite/g++.dg/diagnostic/aka2.C
@@ -0,0 +1,32 @@
+/* Verify that the "aka" descriptions for typedefs are correctly
+   quoted (PR 62170).  */
+
+/* Exercise %H and %I.  */
+
+typedef struct s1 t1;
+typedef struct s2 {int i;} t2;
+
+int foo(t1 *);
+
+void test_1 () {
+  t2 pos;
+
+  foo (&pos); // { dg-error "cannot convert 't2\\*' {aka 's2\\*'} to 't1\\*' {aka 's1\\*'} for argument '1' to 'int foo\\(t1\\*\\)'" }
+}
+
+/* Exercise %T.  */
+
+typedef struct s3
+{  
+  void m3 ();
+} t3;
+
+void test_2 (const s3 *ptr)
+{
+  ptr->m3 (); // { dg-error "passing 'const s3' as 'this' argument discards qualifiers" }
+}
+
+void test_3 (const t3 *ptr)
+{
+  ptr->m3 (); // { dg-error "passing 'const t3' {aka 'const s3'} as 'this' argument discards qualifiers" }
+}
diff --git a/gcc/testsuite/g++.dg/parse/error55.C b/gcc/testsuite/g++.dg/parse/error55.C
index 24cca50..70af85d 100644
--- a/gcc/testsuite/g++.dg/parse/error55.C
+++ b/gcc/testsuite/g++.dg/parse/error55.C
@@ -3,5 +3,5 @@
 class A { };
 typedef A B;
 void foo (B &a) {
-  a.x();  // { dg-error "'B {aka class A}' has no member named 'x'" }
+  a.x();  // { dg-error "'B' {aka 'class A'} has no member named 'x'" }
 }
diff --git a/gcc/testsuite/gcc.dg/diag-aka-1.c b/gcc/testsuite/gcc.dg/diag-aka-1.c
index 87bc757..fde4ca7 100644
--- a/gcc/testsuite/gcc.dg/diag-aka-1.c
+++ b/gcc/testsuite/gcc.dg/diag-aka-1.c
@@ -10,7 +10,7 @@ typedef int IA[];
 typedef IA *IAP;
 extern IAP arr[];
 
-void fn1 (B *); /* { dg-message "expected .B \\* {aka struct A \\*}. but argument is of type .struct B \\*." } */
+void fn1 (B *); /* { dg-message "expected 'B \\*' {aka 'struct A \\*'} but argument is of type 'struct B \\*'" } */
 void fn2 (TFC *);
 
 void 
@@ -24,6 +24,6 @@ bar (B *b, int *i)
 int
 foo (void *a)
 {
-  T *t = a; /* { dg-warning "request for implicit conversion from .void \\*. to .T \\* {aka struct T \\*}. not" } */
+  T *t = a; /* { dg-warning "request for implicit conversion from 'void \\*' to 'T \\*' {aka 'struct T \\*'} not" } */
   return t->i;
 }
diff --git a/gcc/testsuite/gcc.dg/diag-aka-2.c b/gcc/testsuite/gcc.dg/diag-aka-2.c
new file mode 100644
index 0000000..a4b2242
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/diag-aka-2.c
@@ -0,0 +1,12 @@
+/* Verify that the "aka" descriptions for typedefs are correctly
+   quoted (PR 62170).  */
+
+typedef struct s1 t1;
+
+int foo(t1 *); /* { dg-message "expected 't1 \\*' {aka 'struct s1 \\*'} but argument is of type 't2 \\*' {aka 'struct s2 \\*'}" } */
+
+int bar() {
+  typedef struct s2 {int i;} t2;
+  t2 pos;
+  return foo(&pos); /* { dg-error "incompatible pointer type" } */
+}
diff --git a/gcc/testsuite/gcc.dg/pr13804-1.c b/gcc/testsuite/gcc.dg/pr13804-1.c
index 65b238a..5fc17f4 100644
--- a/gcc/testsuite/gcc.dg/pr13804-1.c
+++ b/gcc/testsuite/gcc.dg/pr13804-1.c
@@ -20,9 +20,9 @@ void
 f (void)
 {
   x0.c; /* { dg-error "'struct s0' has no member named 'c'" } */
-  x1.c; /* { dg-error "'S0 {aka struct s0}' has no member named 'c'" } */
+  x1.c; /* { dg-error "'S0' {aka 'struct s0'} has no member named 'c'" } */
   x2.c; /* { dg-error "'union u0' has no member named 'c'" } */
-  x3.c; /* { dg-error "'U0 {aka union u0}' has no member named 'c'" } */
+  x3.c; /* { dg-error "'U0' {aka 'union u0'} has no member named 'c'" } */
   x4->c; /* { dg-error "'struct s0' has no member named 'c'" } */
   x5->c; /* { dg-error "'union u0' has no member named 'c'" } */
 }
diff --git a/gcc/testsuite/gcc.dg/pr56980.c b/gcc/testsuite/gcc.dg/pr56980.c
index 27405ef..5303c61 100644
--- a/gcc/testsuite/gcc.dg/pr56980.c
+++ b/gcc/testsuite/gcc.dg/pr56980.c
@@ -5,12 +5,12 @@ typedef struct A { int i; } B;
 typedef union U { int i; } V;
 typedef enum E { G } F;
 
-void foo_s (struct A); /* { dg-message "expected .struct A. but argument is of type .B \\* {aka struct A \\*}." } */
-void foo_u (union U); /* { dg-message "expected .union U. but argument is of type .V \\* {aka union U \\*}." } */
-void foo_e (enum E); /* { dg-message "expected .enum E. but argument is of type .F \\* {aka enum E \\*}." } */
-void foo_sp (B *); /* { dg-message "expected .B \\* {aka struct A \\*}. but argument is of type .struct B \\*." } */
-void foo_up (V *); /* { dg-message "expected .V \\* {aka union U \\*}. but argument is of type .union V \\*." } */
-void foo_ep (F *); /* { dg-message "expected .F \\* {aka enum E \\*}. but argument is of type .enum F \\*." } */
+void foo_s (struct A); /* { dg-message "expected .struct A. but argument is of type 'B \\*' {aka 'struct A \\*'}" } */
+void foo_u (union U); /* { dg-message "expected .union U. but argument is of type 'V \\*' {aka 'union U \\*'}" } */
+void foo_e (enum E); /* { dg-message "expected .enum E. but argument is of type 'F \\*' {aka 'enum E \\*'}" } */
+void foo_sp (B *); /* { dg-message "expected 'B \\*' {aka 'struct A \\*'} but argument is of type .struct B \\*." } */
+void foo_up (V *); /* { dg-message "expected 'V \\*' {aka 'union U \\*'} but argument is of type .union V \\*." } */
+void foo_ep (F *); /* { dg-message "expected 'F \\*' {aka 'enum E \\*'} but argument is of type .enum F \\*." } */
 
 void 
 bar (B *b, V *v, F *f)
diff --git a/gcc/testsuite/gcc.dg/pr65050.c b/gcc/testsuite/gcc.dg/pr65050.c
index 0822a99..e29559d 100644
--- a/gcc/testsuite/gcc.dg/pr65050.c
+++ b/gcc/testsuite/gcc.dg/pr65050.c
@@ -2,9 +2,9 @@
 /* { dg-do compile } */
 
 typedef int A[];
-struct S { int i; A a[5]; } s; /* { dg-error "array type has incomplete element type .A {aka int\\\[\\\]}." } */
+struct S { int i; A a[5]; } s; /* { dg-error "array type has incomplete element type 'A' {aka 'int\\\[\\\]'}" } */
 extern void foo (int p[2][]); /* { dg-error "array type has incomplete element type .int\\\[\\\]." } */
-extern void bar (A p[2]); /* { dg-error "array type has incomplete element type .A {aka int\\\[\\\]}." } */
+extern void bar (A p[2]); /* { dg-error "array type has incomplete element type 'A' {aka 'int\\\[\\\]'}" } */
 
 void
 foo (int p[2][]) /* { dg-error "array type has incomplete element type .int\\\[\\\]." } */
@@ -12,7 +12,7 @@ foo (int p[2][]) /* { dg-error "array type has incomplete element type .int\\\[\
 }
 
 void
-bar (A p[2]) /* { dg-error "array type has incomplete element type .A {aka int\\\[\\\]}." } */
+bar (A p[2]) /* { dg-error "array type has incomplete element type 'A' {aka 'int\\\[\\\]'}" } */
 {
 }
 
@@ -20,4 +20,4 @@ struct T;
 struct T t[5]; /* { dg-error "array type has incomplete element type .struct T." } */
 struct U u[] = { { "abc" } }; /* { dg-error "array type has incomplete element type .struct U." } */
 typedef struct T TT;
-TT tt[5]; /* { dg-error "array type has incomplete element type .TT {aka struct T}." } */
+TT tt[5]; /* { dg-error "array type has incomplete element type 'TT' {aka 'struct T'}" } */
diff --git a/gcc/testsuite/gcc.dg/redecl-14.c b/gcc/testsuite/gcc.dg/redecl-14.c
index 97003c1..1bf1d96 100644
--- a/gcc/testsuite/gcc.dg/redecl-14.c
+++ b/gcc/testsuite/gcc.dg/redecl-14.c
@@ -18,5 +18,5 @@ f (void)
   }
   extern IAP a[];
   extern IAP a[5];
-  sizeof (*a[0]); /* { dg-error "invalid application of 'sizeof' to incomplete type 'IA {aka int\\\[\\\]}'" } */
+  sizeof (*a[0]); /* { dg-error "invalid application of 'sizeof' to incomplete type 'IA' {aka 'int\\\[\\\]'}" } */
 }
diff --git a/gcc/testsuite/gcc.dg/utf16-4.c b/gcc/testsuite/gcc.dg/utf16-4.c
index e2f115e..4b20387 100644
--- a/gcc/testsuite/gcc.dg/utf16-4.c
+++ b/gcc/testsuite/gcc.dg/utf16-4.c
@@ -12,7 +12,7 @@ char16_t	c2 = u'\U00064321';	/* { dg-warning "constant too long" } */
 char16_t	c3 = 'a';
 char16_t	c4 = U'a';
 char16_t	c5 = U'\u2029';
-char16_t	c6 = U'\U00064321';	/* { dg-warning "conversion from .(long )?unsigned int. to .char16_t {aka short unsigned int}. changes value from .410401. to .17185." } */
+char16_t	c6 = U'\U00064321';	/* { dg-warning "conversion from .(long )?unsigned int. to 'char16_t' {aka 'short unsigned int'} changes value from .410401. to .17185." } */
 char16_t	c7 = L'a';
 char16_t	c8 = L'\u2029';
 char16_t 	c9 = L'\U00064321';	/* { dg-warning "conversion" "" { target { 4byte_wchar_t } } } */
diff --git a/gcc/testsuite/gcc.target/i386/sse-vect-types.c b/gcc/testsuite/gcc.target/i386/sse-vect-types.c
index 9cb6f3e..ac4ece4 100644
--- a/gcc/testsuite/gcc.target/i386/sse-vect-types.c
+++ b/gcc/testsuite/gcc.target/i386/sse-vect-types.c
@@ -10,4 +10,4 @@ __m128d foo1(__m128d z, __m128d  a, int N) {
   }
   return a;
 }
-/* { dg-message "note: expected '\[^'\n\]*' but argument is of type '\[^'\n\]*'" "note: expected" { target *-*-* } 0 } */
+/* { dg-message "note: expected '.*'.* but argument is of type '.*'" "note: expected" { target *-*-* } 0 } */
diff --git a/gcc/testsuite/obj-c++.dg/invalid-type-1.mm b/gcc/testsuite/obj-c++.dg/invalid-type-1.mm
index cb2138f..59c8666 100644
--- a/gcc/testsuite/obj-c++.dg/invalid-type-1.mm
+++ b/gcc/testsuite/obj-c++.dg/invalid-type-1.mm
@@ -18,8 +18,8 @@ id <MyProtocol> object; /* This is fine.  */
 
 AClass <MyProtocol> *object1; /* This is fine.  */
 
-Integer <MyProtocol> *object2; /* { dg-error ".Integer {aka int}. is not a template" } */
+Integer <MyProtocol> *object2; /* { dg-error "'Integer' {aka 'int'} is not a template" } */
 /* { dg-error ".MyProtocol. was not declared in this scope" "" { target *-*-* } .-1 } */
 
-Integer <NonExistingProtocol> *object3; /* { dg-error ".Integer {aka int}. is not a template" } */
+Integer <NonExistingProtocol> *object3; /* { dg-error "'Integer' {aka 'int'} is not a template" } */
 /* { dg-error ".NonExistingProtocol. was not declared in this scope" "" { target *-*-* } .-1 } */
diff --git a/gcc/testsuite/objc.dg/proto-lossage-4.m b/gcc/testsuite/objc.dg/proto-lossage-4.m
index c9c80b7..182e92d 100644
--- a/gcc/testsuite/objc.dg/proto-lossage-4.m
+++ b/gcc/testsuite/objc.dg/proto-lossage-4.m
@@ -28,13 +28,13 @@ long foo(void) {
   receiver += [receiver anotherValue]; /* { dg-warning "invalid receiver type .intptr_t." } */
 
   receiver += [(Obj *)receiver someValue]; /* { dg-warning ".Obj. may not respond to .\\-someValue." } */
-/* { dg-warning "assignment to 'intptr_t {aka (long )?int}' from 'id' makes integer from pointer without a cast" "" { target *-*-* } .-1 } */
+/* { dg-warning "assignment to 'intptr_t' {aka '(long )?int'} from 'id' makes integer from pointer without a cast" "" { target *-*-* } .-1 } */
 
   receiver += [(Obj *)receiver anotherValue];
   receiver += [(Obj <Proto> *)receiver someValue];
   receiver += [(Obj <Proto> *)receiver anotherValue];
   receiver += [objrcvr someValue]; /* { dg-warning ".Obj. may not respond to .\\-someValue." } */
-/* { dg-warning "assignment to 'intptr_t {aka (long )?int}' from 'id' makes integer from pointer without a cast" "" { target *-*-* } .-1 } */
+/* { dg-warning "assignment to 'intptr_t' {aka '(long )?int'} from 'id' makes integer from pointer without a cast" "" { target *-*-* } .-1 } */
 
   receiver += [objrcvr anotherValue];
   receiver += [(Obj <Proto> *)objrcvr someValue];
@@ -42,7 +42,7 @@ long foo(void) {
   receiver += [objrcvr2 someValue];
   receiver += [objrcvr2 anotherValue];
   receiver += [(Obj *)objrcvr2 someValue]; /* { dg-warning ".Obj. may not respond to .\\-someValue." } */
-/* { dg-warning "assignment to 'intptr_t {aka (long )?int}' from 'id' makes integer from pointer without a cast" "" { target *-*-* } .-1 } */
+/* { dg-warning "assignment to 'intptr_t' {aka '(long )?int'} from 'id' makes integer from pointer without a cast" "" { target *-*-* } .-1 } */
 
   receiver += [(Obj *)objrcvr2 anotherValue];
 
diff --git a/gcc/tree-diagnostic.c b/gcc/tree-diagnostic.c
index 023e896..c80ae54 100644
--- a/gcc/tree-diagnostic.c
+++ b/gcc/tree-diagnostic.c
@@ -246,7 +246,7 @@ virt_loc_aware_diagnostic_finalizer (diagnostic_context *context,
 bool
 default_tree_printer (pretty_printer *pp, text_info *text, const char *spec,
 		      int precision, bool wide, bool set_locus, bool hash,
-		      bool, const char **)
+		      bool *, const char **)
 {
   tree t;
 
diff --git a/gcc/tree-diagnostic.h b/gcc/tree-diagnostic.h
index 85aa980..e38bb44 100644
--- a/gcc/tree-diagnostic.h
+++ b/gcc/tree-diagnostic.h
@@ -55,6 +55,6 @@ void virt_loc_aware_diagnostic_finalizer (diagnostic_context *,
 
 void tree_diagnostics_defaults (diagnostic_context *context);
 bool default_tree_printer (pretty_printer *, text_info *, const char *,
-			   int, bool, bool, bool, bool, const char **);
+			   int, bool, bool, bool, bool *, const char **);
 
 #endif /* ! GCC_TREE_DIAGNOSTIC_H */
