Move ASM_COMMENT_START to defaults.h.

Note the extreme silliness in dwarf2out.c with 3 (three) copies.

        * defaults.h (ASM_COMMENT_START): Move here...
        * dwarf2asm.c: ... from here.
        * dwarf2out.c, final.c, vmsdbgout.c: Remove duplicates.
        * toplev.c: Remove ifndef tests of ASM_COMMENT_START.
        * varasm.c: Likewise.

From-SVN: r176093

gcc/ChangeLog

 2011-07-09  Richard Henderson  <rth@redhat.com>
 
+	* defaults.h (ASM_COMMENT_START): Move here...
+	* dwarf2asm.c: ... from here.
+	* dwarf2out.c, final.c, vmsdbgout.c: Remove duplicates.
+	* toplev.c: Remove ifndef tests of ASM_COMMENT_START.
+	* varasm.c: Likewise.
+
+2011-07-09  Richard Henderson  <rth@redhat.com>
+
 	PR debug/49686
 	* dwarf2cfi.c (dwarf2out_frame_debug): Don't set cfi_insn here...
 	(create_cfi_notes): ... do it here instead.

gcc/defaults.h

@@ -28,6 +28,11 @@ see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
 #ifndef GCC_DEFAULTS_H
 #define GCC_DEFAULTS_H
 
+/* How to start an assembler comment.  */
+#ifndef ASM_COMMENT_START
+#define ASM_COMMENT_START ";#"
+#endif
+
 /* Store in OUTPUT a string (made with alloca) containing an
    assembler-name for a local static variable or function named NAME.
    LABELNO is an integer which is different for each call.  */

gcc/dwarf2asm.c

@@ -35,12 +35,6 @@ along with GCC; see the file COPYING3.  If not see
 #include "tm_p.h"
 
 
-/* How to start an assembler comment.  */
-#ifndef ASM_COMMENT_START
-#define ASM_COMMENT_START ";#"
-#endif
-
-
 /* Output an unaligned integer with the given value and size.  Prefer not
    to print a newline, since the caller may want to add a comment.  */
 

gcc/dwarf2out.c

@@ -168,11 +168,6 @@ static GTY(()) section *debug_str_section;
 static GTY(()) section *debug_ranges_section;
 static GTY(()) section *debug_frame_section;
 
-/* How to start an assembler comment.  */
-#ifndef ASM_COMMENT_START
-#define ASM_COMMENT_START ";#"
-#endif
-
 /* Maximum size (in bytes) of an artificially generated label.  */
 #define MAX_ARTIFICIAL_LABEL_BYTES	30
 
@@ -277,11 +272,6 @@ static void output_cfa_loc_raw (dw_cfi_ref);
    personality CFI.  */
 static GTY(()) rtx current_unit_personality;
 
-/* How to start an assembler comment.  */
-#ifndef ASM_COMMENT_START
-#define ASM_COMMENT_START ";#"
-#endif
-
 /* Data and reference forms for relocatable data.  */
 #define DW_FORM_data (DWARF_OFFSET_SIZE == 8 ? DW_FORM_data8 : DW_FORM_data4)
 #define DW_FORM_ref (DWARF_OFFSET_SIZE == 8 ? DW_FORM_ref8 : DW_FORM_ref4)
@@ -3479,11 +3469,6 @@ typedef struct skeleton_chain_struct
 }
 skeleton_chain_node;
 
-/* How to start an assembler comment.  */
-#ifndef ASM_COMMENT_START
-#define ASM_COMMENT_START ";#"
-#endif
-
 /* Define a macro which returns nonzero for a TYPE_DECL which was
    implicitly generated for a type.
 

gcc/final.c

@@ -106,11 +106,6 @@ along with GCC; see the file COPYING3.  If not see
 #define CC_STATUS_INIT
 #endif
 
-/* How to start an assembler comment.  */
-#ifndef ASM_COMMENT_START
-#define ASM_COMMENT_START ";#"
-#endif
-
 /* Is the given character a logical line separator for the assembler?  */
 #ifndef IS_ASM_LOGICAL_LINE_SEPARATOR
 #define IS_ASM_LOGICAL_LINE_SEPARATOR(C, STR) ((C) == ';')

gcc/toplev.c

@@ -722,7 +722,6 @@ print_version (FILE *file, const char *indent)
   print_plugins_versions (file, indent);
 }
 
-#ifdef ASM_COMMENT_START
 static int
 print_to_asm_out_file (print_switch_type type, const char * text)
 {
@@ -755,7 +754,6 @@ print_to_asm_out_file (print_switch_type type, const char * text)
       return -1;
     }
 }
-#endif
 
 static int
 print_to_stderr (print_switch_type type, const char * text)
@@ -921,7 +919,6 @@ init_asm_output (const char *name)
 	    inform (input_location, "-frecord-gcc-switches is not supported by the current target");
 	}
 
-#ifdef ASM_COMMENT_START
       if (flag_verbose_asm)
 	{
 	  /* Print the list of switches in effect
@@ -930,7 +927,6 @@ init_asm_output (const char *name)
 	  print_switch_values (print_to_asm_out_file);
 	  putc ('\n', asm_out_file);
 	}
-#endif
     }
 }
 

gcc/varasm.c

@@ -5062,14 +5062,12 @@ output_constructor (tree exp, unsigned HOST_WIDE_INT size,
       else if (TREE_CODE (local.type) == ARRAY_TYPE)
 	local.index = ce->index;
 
-#ifdef ASM_COMMENT_START
       if (local.field && flag_verbose_asm)
 	fprintf (asm_out_file, "%s %s:\n",
 		 ASM_COMMENT_START,
 		 DECL_NAME (local.field)
 		 ? IDENTIFIER_POINTER (DECL_NAME (local.field))
 		 : "<anonymous>");
-#endif
 
       /* Eliminate the marker that makes a cast not be an lvalue.  */
       if (local.val != NULL_TREE)
@@ -6180,12 +6178,10 @@ default_elf_asm_named_section (const char *name, unsigned int flags,
 	type = "progbits";
 
       format = ",@%s";
-#ifdef ASM_COMMENT_START
       /* On platforms that use "@" as the assembly comment character,
 	 use "%" instead.  */
       if (strcmp (ASM_COMMENT_START, "@") == 0)
 	format = ",%%%s";
-#endif
       fprintf (asm_out_file, format, type);
 
       if (flags & SECTION_ENTSIZE)

gcc/vmsdbgout.c

@@ -74,11 +74,6 @@ typedef struct dst_file_info_struct
 }
 dst_file_info_entry;
 
-/* How to start an assembler comment.  */
-#ifndef ASM_COMMENT_START
-#define ASM_COMMENT_START ";#"
-#endif
-
 /* Maximum size (in bytes) of an artificially generated label.  */
 #define MAX_ARTIFICIAL_LABEL_BYTES	30