re PR bootstrap/43684 (multiple 'set but not used' errors.)

gcc/
2010-04-09  Iain Sandoe  <iains@gcc.gnu.org>

	PR bootstrap/43684
	* varasm.c (default_assemble_visibility): Wrap vars that are 
	set, but unused, by targets without GAS.
	* config/rs6000/rs6000.c: (paired_emit_vector_compare): 
	Remove set, but unused, vars.
	(rs6000_legitimize_tls_address): Likewise.
	(altivec_expand_dst_builtin): Likewise.
	* config/darwin.c (machopic_classify_symbol): Likewise.
	(machopic_indirection_name): Likewise.

gcc/fortran/
2010-04-09  Iain Sandoe  <iains@gcc.gnu.org>

	PR bootstrap/43684
	* gfortranspec.c (lang_specific_driver): Do not expose vars 
	only used by HAVE_LD_STATIC_DYNAMIC targets unless compiling
	for such.

From-SVN: r158164

gcc/ChangeLog

+2010-04-09  Iain Sandoe  <iains@gcc.gnu.org>
+
+	PR bootstrap/43684
+	* varasm.c (default_assemble_visibility): Wrap vars that are 
+	set, but unused, by targets without GAS.
+	* config/rs6000/rs6000.c: (paired_emit_vector_compare): 
+	Remove set, but unused, vars.
+	(rs6000_legitimize_tls_address): Likewise.
+	(altivec_expand_dst_builtin): Likewise.
+	* config/darwin.c (machopic_classify_symbol): Likewise.
+	(machopic_indirection_name): Likewise.
+	
 2010-04-09  Uros Bizjak  <ubizjak@gmail.com>
 
 	* config/i386/i386.md (DWI): New mode iterator.

gcc/config/darwin.c

@@ -188,10 +188,8 @@ machopic_symbol_defined_p (rtx sym_ref)
 enum machopic_addr_class
 machopic_classify_symbol (rtx sym_ref)
 {
-  int flags;
   bool function_p;
 
-  flags = SYMBOL_REF_FLAGS (sym_ref);
   function_p = SYMBOL_REF_FUNCTION_P (sym_ref);
   if (machopic_symbol_defined_p (sym_ref))
     return (function_p
@@ -363,7 +361,6 @@ machopic_indirection_name (rtx sym_ref, bool stub_p)
   size_t namelen = strlen (name);
   machopic_indirection *p;
   void ** slot;
-  bool saw_star = false;
   bool needs_quotes;
   const char *suffix;
   const char *prefix = user_label_prefix;
@@ -386,7 +383,6 @@ machopic_indirection_name (rtx sym_ref, bool stub_p)
 
   if (name[0] == '*')
     {
-      saw_star = true;
       prefix = "";
       ++name;
       --namelen;

gcc/config/rs6000/rs6000.c

@@ -4183,7 +4183,7 @@ paired_emit_vector_compare (enum rtx_code rcode,
                             rtx cc_op0, rtx cc_op1)
 {
   rtx tmp = gen_reg_rtx (V2SFmode);
-  rtx tmp1, max, min, equal_zero;
+  rtx tmp1, max, min;
 
   gcc_assert (TARGET_PAIRED_FLOAT);
   gcc_assert (GET_MODE (op0) == GET_MODE (op1));
@@ -4210,8 +4210,8 @@ paired_emit_vector_compare (enum rtx_code rcode,
       tmp1 = gen_reg_rtx (V2SFmode);
       max = gen_reg_rtx (V2SFmode);
       min = gen_reg_rtx (V2SFmode);
-      equal_zero = gen_reg_rtx (V2SFmode);
-
+      gen_reg_rtx (V2SFmode);
+      
       emit_insn (gen_subv2sf3 (tmp, cc_op0, cc_op1));
       emit_insn (gen_selv2sf4
                  (max, tmp, cc_op0, cc_op1, CONST0_RTX (SFmode)));
@@ -5412,14 +5412,14 @@ rs6000_legitimize_tls_address (rtx addr, enum tls_model model)
 	      else
 		{
 		  rtx tmp3, mem;
-		  rtx first, last;
+		  rtx last;
 
 		  tmp1 = gen_reg_rtx (Pmode);
 		  tmp2 = gen_reg_rtx (Pmode);
 		  tmp3 = gen_reg_rtx (Pmode);
 		  mem = gen_const_mem (Pmode, tmp1);
 
-		  first = emit_insn (gen_load_toc_v4_PIC_1b (gsym));
+		  emit_insn (gen_load_toc_v4_PIC_1b (gsym));
 		  emit_move_insn (tmp1,
 				  gen_rtx_REG (Pmode, LR_REGNO));
 		  emit_move_insn (tmp2, mem);
@@ -10148,7 +10148,7 @@ altivec_expand_dst_builtin (tree exp, rtx target ATTRIBUTE_UNUSED,
   tree fndecl = TREE_OPERAND (CALL_EXPR_FN (exp), 0);
   unsigned int fcode = DECL_FUNCTION_CODE (fndecl);
   tree arg0, arg1, arg2;
-  enum machine_mode mode0, mode1, mode2;
+  enum machine_mode mode0, mode1;
   rtx pat, op0, op1, op2;
   const struct builtin_description *d;
   size_t i;
@@ -10168,7 +10168,6 @@ altivec_expand_dst_builtin (tree exp, rtx target ATTRIBUTE_UNUSED,
 	op2 = expand_normal (arg2);
 	mode0 = insn_data[d->icode].operand[0].mode;
 	mode1 = insn_data[d->icode].operand[1].mode;
-	mode2 = insn_data[d->icode].operand[2].mode;
 
 	/* Invalid arguments, bail out before generating bad rtl.  */
 	if (arg0 == error_mark_node

gcc/fortran/ChangeLog

+2010-04-09  Iain Sandoe  <iains@gcc.gnu.org>
+
+	PR bootstrap/43684
+	* gfortranspec.c (lang_specific_driver): Do not expose vars 
+	only used by HAVE_LD_STATIC_DYNAMIC targets unless compiling
+	for such.
+
 2010-04-09  Tobias Burnus  <burnus@net-b.de>
 
 	PR fortran/18918

gcc/fortran/gfortranspec.c

@@ -275,11 +275,13 @@ lang_specific_driver (int *in_argc, const char *const **in_argv,
   /* By default, we throw on the math library if we have one.  */
   int need_math = (MATH_LIBRARY[0] != '\0');
 
-  /* Whether we should link a static libgfortran.  */
-  int static_lib = 0;
+#ifdef HAVE_LD_STATIC_DYNAMIC
+  /* Whether we should link a static libgfortran. */
+  int static_lib = 0; 
 
   /* Whether we need to link statically.  */
   int static_linking = 0;
+#endif
 
   /* The number of input and output files in the incoming arg list.  */
   int n_infiles = 0;
@@ -340,11 +342,17 @@ lang_specific_driver (int *in_argc, const char *const **in_argv,
 	  break;
 
 	case OPTION_static_libgfortran:
+#ifdef HAVE_LD_STATIC_DYNAMIC
 	  static_lib = 1;
+#endif
 	  break;
 
 	case OPTION_static:
+#ifdef HAVE_LD_STATIC_DYNAMIC
 	  static_linking = 1;
+#endif
+	  /* Fall through, count OPTION_static as an item included in
+	     the rewritten command line. */
 
 	case OPTION_l:
 	  ++n_infiles;

gcc/varasm.c

@@ -5803,8 +5803,10 @@ assemble_alias (tree decl, tree target)
    the visibility type VIS, which must not be VISIBILITY_DEFAULT.  */
 
 void
-default_assemble_visibility (tree decl, int vis)
+default_assemble_visibility (tree decl ATTRIBUTE_UNUSED, 
+			     int vis ATTRIBUTE_UNUSED)
 {
+#ifdef HAVE_GAS_HIDDEN
   static const char * const visibility_types[] = {
     NULL, "protected", "hidden", "internal"
   };
@@ -5814,7 +5816,6 @@ default_assemble_visibility (tree decl, int vis)
   name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl));
   type = visibility_types[vis];
 
-#ifdef HAVE_GAS_HIDDEN
   fprintf (asm_out_file, "\t.%s\t", type);
   assemble_name (asm_out_file, name);
   fprintf (asm_out_file, "\n");