invoke.texi: Document more C++ command-line options.

	* invoke.texi: Document more C++ command-line options.

	Remove support for -Wextern-inline, -flabels-ok, -fvtable-gc, -fxref
	* cp-tree.h (warn_extern_inline): Remove.
	(flag_labels_ok): Likewise.
	* decl2.c (warn_extern_inline): Remove.
	(flag_labels_ok): Likewise.
	(lang_f_options): Remove labels-ok, vtable-gc, xref.
	(unsupported_options): Add them.
	(cxx_decode_option): Don't accept -Wextern-inline.
	* method.c (hack_identifier): Remove -flabels-ok support.
	* spew.c (see_typename): Likewise.

	* g++.dg/vtgc1.C: XFAIL.
	* g++.old-deja/g++.other/crash18.C: Likewise.

From-SVN: r41609

gcc/cp/cp-tree.h

@@ -1064,10 +1064,6 @@ extern int warn_ecpp;
 
 extern int warn_sign_promo;
 
-/* Non-zero means warn when a function is declared extern and later inline.  */
-
-extern int warn_extern_inline;
-
 /* Non-zero means warn when an old-style cast is used.  */
 
 extern int warn_old_style_cast;
@@ -3180,10 +3176,6 @@ typedef enum instantiate_type_flags {
   itf_ptrmem_ok = 1 << 2,     /* pointers to member ok (internal use) */
 } instantiate_type_flags;
 
-/* Non-zero means that if a label exists, and no other identifier
-   applies, use the value of the label.  */
-extern int flag_labels_ok;
-
 /* Nonzero means allow Microsoft extensions without a pedwarn.  */
 extern int flag_ms_extensions;
 

gcc/cp/decl2.c

@@ -273,10 +273,6 @@ int warn_overloaded_virtual;
 
 int warn_nonvdtor;
 
-/* Non-zero means warn when a function is declared extern and later inline.  */
-
-int warn_extern_inline;
-
 /* Non-zero means warn when the compiler will reorder code.  */
 
 int warn_reorder;
@@ -327,10 +323,6 @@ int warn_deprecated = 1;
 #endif
 int dollars_in_ident = DOLLARS_IN_IDENTIFIERS;
 
-/* Nonzero means that labels can be used as first-class objects */
-
-int flag_labels_ok;
-
 /* Nonzero means allow Microsoft extensions without a pedwarn.  */
 
 int flag_ms_extensions;
@@ -473,7 +465,6 @@ lang_f_options[] =
   {"implement-inlines", &flag_implement_inlines, 1},
   {"implicit-inline-templates", &flag_implicit_inline_templates, 1},
   {"implicit-templates", &flag_implicit_templates, 1},
-  {"labels-ok", &flag_labels_ok, 1},
   {"ms-extensions", &flag_ms_extensions, 1},
   {"nonansi-builtins", &flag_no_nonansi_builtin, 0},
   {"operator-names", &flag_operator_names, 1},
@@ -483,10 +474,8 @@ lang_f_options[] =
   {"rtti", &flag_rtti, 1},
   {"stats", &flag_detailed_statistics, 1},
   {"use-cxa-atexit", &flag_use_cxa_atexit, 1},
-  {"vtable-gc", &flag_vtable_gc, 1},
   {"vtable-thunks", &flag_vtable_thunks, 1},
-  {"weak", &flag_weak, 1},
-  {"xref", &flag_gnu_xref, 1}
+  {"weak", &flag_weak, 1}
 };
 
 /* The list of `-f' options that we no longer support.  The `-f'
@@ -497,10 +486,13 @@ static const char * const unsupported_options[] = {
   "cond-mismatch",
   "enum-int-equiv",
   "guiding-decls",
+  "labels-ok",
   "nonnull-objects",
   "squangle",
   "strict-prototype",
   "this-is-variable",
+  "vtable-gc",
+  "xref"
 };
 
 /* Compare two option strings, pointed two by P1 and P2, for use with
@@ -701,8 +693,6 @@ cxx_decode_option (argc, argv)
 	warn_parentheses = setting;
       else if (!strcmp (p, "non-virtual-dtor"))
 	warn_nonvdtor = setting;
-      else if (!strcmp (p, "extern-inline"))
-	warn_extern_inline = setting;
       else if (!strcmp (p, "reorder"))
 	warn_reorder = setting;
       else if (!strcmp (p, "synth"))

gcc/cp/method.c

@@ -182,10 +182,6 @@ hack_identifier (value, name)
 #endif
 	    }
 	}
-      if (flag_labels_ok && IDENTIFIER_LABEL_VALUE (name))
-	{
-	  return IDENTIFIER_LABEL_VALUE (name);
-	}
       return error_mark_node;
     }
 

gcc/cp/spew.c

@@ -701,12 +701,7 @@ see_typename ()
   if (yychar == IDENTIFIER)
     {
       lastiddecl = lookup_name (yylval.ttype, -2);
-      if (lastiddecl == 0)
-	{
-	  if (flag_labels_ok)
-	    lastiddecl = IDENTIFIER_LABEL_VALUE (yylval.ttype);
-	}
-      else
+      if (lastiddecl)
 	yychar = identifier_type (lastiddecl);
     }
 }

gcc/invoke.texi

@@ -1232,6 +1232,17 @@ two definitions were merged.
 This option is no longer useful on most targets, now that support has
 been added for putting variables into BSS without making them common.
 
+@item -fno-const-strings 
+Give string constants type @code{char *} instead of type @code{const
+char *}.  By default, G++ uses type @code{const char *} as required by
+the standard.  Even if you use @samp{-fno-const-strings}, you cannot
+actually modify the value of a string constant, unless you also use
+@samp{-fwritable-strings}.
+
+This option might be removed in a future release of G++.  For maximum
+portability, you should structure your code so that it works with
+string constants that have type @code{const char *}.
+
 @item -fdollars-in-identifiers
 Accept @samp{$} in identifiers.  You can also explicitly prohibit use of
 @samp{$} with the option @samp{-fno-dollars-in-identifiers}.  (GNU C allows
@@ -1321,6 +1332,11 @@ errors if these functions are not inlined everywhere they are called.
 Disable pedantic warnings about constructs used in MFC, such as implicit
 int and getting a pointer to member function via non-standard syntax.
 
+@item -fno-nonansi-builtins
+Disable builtin declarations of functions that are not mandated by
+ANSI/ISO C.  These include @code{ffs}, @code{alloca}, @code{_exit},
+@code{index}, @code{bzero}, @code{conjf}, and other related functions.
+
 @item -fno-operator-names
 Do not treat the operator name keywords @code{and}, @code{bitand},
 @code{bitor}, @code{compl}, @code{not}, @code{or} and @code{xor} as
@@ -1350,6 +1366,10 @@ of the language, you can save some space by using this flag.  Note that
 exception handling uses the same information, but it will generate it as
 needed.
 
+@item -fstats
+Emit statistics about front-end processing at the end of the compilation.
+This information is generally only useful to the G++ development team.
+
 @item -ftemplate-depth-@var{n}
 Set the maximum instantiation depth for template classes to @var{n}.
 A limit on the template instantiation depth is needed to detect
@@ -1379,6 +1399,13 @@ those.
 Like all options that change the ABI, all C++ code, @emph{including
 libgcc.a} must be built with the same setting of this option.
 
+@item -fno-weak 
+Do not use weak symbol support, even if it is provied by the linker.
+By default, G++ will use weak symbols if they are available.  This
+option exists only for testing, and should not be used by end-users;
+it will result in inferior code and has no benefits.  This option may
+be removed in a future release of G++.
+
 @item -nostdinc++
 Do not search for header files in the standard directories specific to
 C++, but do still search the other standard directories.  (This option

gcc/testsuite/g++.dg/vtgc1.C

 // { dg-do compile }
 // { dg-options "-fvtable-gc" }
+// { dg-excess-errors "-fvtable-gc unsupported" { xfail *-*-* } }
 // Origin: Hans-Peter Nilsson <hp@bitrange.com>
 
 class Base0
@@ -118,16 +119,29 @@ void x3 (Multivs1 *ii) { ii->f2();}
 void x4 (Multiss2 *ii) { ii->f2();}
 void x5 (Multivv3 *ii) { ii->f2();}
 
+// { dg-final { setup_xfail *-*-* } }
 // { dg-final { scan-assembler-dem vtgc1.C "\.vtable_inherit\[ \t\]*vtable for Multivv3, 0" } }
+// { dg-final { setup_xfail *-*-* } }
 // { dg-final { scan-assembler-dem vtgc1.C "\.vtable_inherit\[ \t\]*VTT for Multivv3, 0" } }
+// { dg-final { setup_xfail *-*-* } }
 // { dg-final { scan-assembler-dem vtgc1.C "\.vtable_inherit\[ \t\]*vtable for Multiss2, vtable for Base2" } }
+// { dg-final { setup_xfail *-*-* } }
 // { dg-final { scan-assembler-dem vtgc1.C "\.vtable_inherit\[ \t\]*vtable for Multivs1, vtable for Base2" } }
+// { dg-final { setup_xfail *-*-* } }
 // { dg-final { scan-assembler-dem vtgc1.C "\.vtable_inherit\[ \t\]*VTT for Multivs1, vtable for Base2" } }
+// { dg-final { setup_xfail *-*-* } }
 // { dg-final { scan-assembler-dem vtgc1.C "\.vtable_inherit\[ \t\]*vtable for Multisv0, vtable for Side0" } }
+// { dg-final { setup_xfail *-*-* } }
 // { dg-final { scan-assembler-dem vtgc1.C "\.vtable_inherit\[ \t\]*VTT for Multisv0, vtable for Side0" } }
+// { dg-final { setup_xfail *-*-* } }
 // { dg-final { scan-assembler-dem vtgc1.C "\.vtable_inherit\[ \t\]*vtable for Side0, 0" } }
+// { dg-final { setup_xfail *-*-* } }
 // { dg-final { scan-assembler-dem vtgc1.C "\.vtable_inherit\[ \t\]*vtable for VbasedA, 0" } }
+// { dg-final { setup_xfail *-*-* } }
 // { dg-final { scan-assembler-dem vtgc1.C "\.vtable_inherit\[ \t\]*VTT for VbasedA, 0" } }
+// { dg-final { setup_xfail *-*-* } }
 // { dg-final { scan-assembler-dem vtgc1.C "\.vtable_inherit\[ \t\]*vtable for Base2, vtable for Base1" } }
+// { dg-final { setup_xfail *-*-* } }
 // { dg-final { scan-assembler-dem vtgc1.C "\.vtable_inherit\[ \t\]*vtable for Base1, vtable for Base0" } }
+// { dg-final { setup_xfail *-*-* } }
 // { dg-final { scan-assembler-dem vtgc1.C "\.vtable_inherit\[ \t\]*vtable for Base0, 0" } }

gcc/testsuite/g++.old-deja/g++.other/crash18.C

 // Build don't link:
 // Special g++ Options: -fvtable-gc
 // Origin: Mark Mitchell <mitchell@codesourcery.com>
-// excess errors test - XFAIL *-*-coff *-*-aout *-*-hms mips*-sgi-irix*
+// excess errors test - XFAIL *-*-*
 
 struct S {
   virtual void f ();