tm.texi: Update.

gcc
	* doc/tm.texi: Update.
	* doc/tm.texi.in (SDB and DWARF) <TARGET_WANT_DEBUG_PUB_SECTIONS>:
	Add @hook.
	* target.def (want_debug_pub_sections): New hook.
	* config/darwin.h (TARGET_WANT_DEBUG_PUB_SECTIONS): Define.
	* dwarf2out.c (add_pubname_string): Check
	targetm.want_debug_pub_sections.
	(add_pubname): Likewise.
	(add_pubtype): Likewise.
gcc/testsuite
	* g++.dg/debug/dwarf2/pubnames-1.C: Make darwin-specific.

From-SVN: r161924

gcc/ChangeLog

+2010-07-07  Tom Tromey  <tromey@redhat.com>
+
+	* doc/tm.texi: Update.
+	* doc/tm.texi.in (SDB and DWARF) <TARGET_WANT_DEBUG_PUB_SECTIONS>:
+	Add @hook.
+	* target.def (want_debug_pub_sections): New hook.
+	* config/darwin.h (TARGET_WANT_DEBUG_PUB_SECTIONS): Define.
+	* dwarf2out.c (add_pubname_string): Check
+	targetm.want_debug_pub_sections.
+	(add_pubname): Likewise.
+	(add_pubtype): Likewise.
+
 2010-07-07  Jie Zhang  <jie@codesourcery.com>
 
 	* genautomata.c (output_automata_list_min_issue_delay_code):

gcc/config/darwin.h

@@ -471,6 +471,8 @@ extern GTY(()) int darwin_ms_struct;
 #define DEBUG_STR_SECTION	"__DWARF,__debug_str,regular,debug"
 #define DEBUG_RANGES_SECTION	"__DWARF,__debug_ranges,regular,debug"
 
+#define TARGET_WANT_DEBUG_PUB_SECTIONS true
+
 /* When generating stabs debugging, use N_BINCL entries.  */
 
 #define DBX_USE_BINCL

gcc/doc/tm.texi

@@ -9278,6 +9278,10 @@ line debug info sections.  This will result in much more compact line number
 tables, and hence is desirable if it works.
 @end defmac
 
+@deftypevr {Target Hook} bool TARGET_WANT_DEBUG_PUB_SECTIONS
+True if the @code{.debug_pubtypes} and @code{.debug_pubnames} sections should be emitted.  These sections are not used on most platforms, and in particular GDB does not use them.
+@end deftypevr
+
 @defmac ASM_OUTPUT_DWARF_DELTA (@var{stream}, @var{size}, @var{label1}, @var{label2})
 A C statement to issue assembly directives that create a difference
 @var{lab1} minus @var{lab2}, using an integer of the given @var{size}.

gcc/doc/tm.texi.in

@@ -9277,6 +9277,8 @@ line debug info sections.  This will result in much more compact line number
 tables, and hence is desirable if it works.
 @end defmac
 
+@hook TARGET_WANT_DEBUG_PUB_SECTIONS
+
 @defmac ASM_OUTPUT_DWARF_DELTA (@var{stream}, @var{size}, @var{label1}, @var{label2})
 A C statement to issue assembly directives that create a difference
 @var{lab1} minus @var{lab2}, using an integer of the given @var{size}.

gcc/dwarf2out.c

@@ -11238,17 +11238,20 @@ dwarf2_name (tree decl, int scope)
 static void
 add_pubname_string (const char *str, dw_die_ref die)
 {
-  pubname_entry e;
+  if (targetm.want_debug_pub_sections)
+    {
+      pubname_entry e;
 
-  e.die = die;
-  e.name = xstrdup (str);
-  VEC_safe_push (pubname_entry, gc, pubname_table, &e);
+      e.die = die;
+      e.name = xstrdup (str);
+      VEC_safe_push (pubname_entry, gc, pubname_table, &e);
+    }
 }
 
 static void
 add_pubname (tree decl, dw_die_ref die)
 {
-  if (TREE_PUBLIC (decl))
+  if (targetm.want_debug_pub_sections && TREE_PUBLIC (decl))
     {
       const char *name = dwarf2_name (decl, 1);
       if (name)
@@ -11263,6 +11266,9 @@ add_pubtype (tree decl, dw_die_ref die)
 {
   pubname_entry e;
 
+  if (!targetm.want_debug_pub_sections)
+    return;
+
   e.name = NULL;
   if ((TREE_PUBLIC (decl)
        || die->die_parent == comp_unit_die)

gcc/target.def

@@ -2337,6 +2337,13 @@ DEFHOOKPOD
  "",
  bool, false)
 
+DEFHOOKPOD
+(want_debug_pub_sections,
+ "True if the @code{.debug_pubtypes} and @code{.debug_pubnames} sections\
+ should be emitted.  These sections are not used on most platforms, and\
+ in particular GDB does not use them.",
+ bool, false)
+
 /* Leave the boolean fields at the end.  */
 
 /* Empty macro arguments are undefined in C90, so use an empty macro.  */

gcc/testsuite/ChangeLog

+2010-07-07  Tom Tromey  <tromey@redhat.com>
+
+	* g++.dg/debug/dwarf2/pubnames-1.C: Make darwin-specific.
+
 2010-07-07  H.J. Lu  <hongjiu.lu@intel.com>
 
 	PR target/44844

gcc/testsuite/g++.dg/debug/dwarf2/pubnames-1.C

 // Contributed by Dodji Seketeli <dodji@redhat.com>
 // Origin PR debug/39706
+// { dg-do compile { target *-*-darwin* } }
 // { dg-options "-g -dA -fno-merge-debug-strings" }
-// { dg-do compile }
 //
 // There should be one debug_pubnames section generated.
 // On Darwin though, there is also a label pointing at the begining of the