Constify more

	* cgen.c (weak_operand_overflow_check): Return const char*.
	* messages.c (as_internal_value_out_of_range): Formatting.
	(as_warn_value_out_of_range): Consify prefix param.
	(as_bad_value_out_of_range): Likewise.
	* read.c (s_errwarn): Constify msg..
	(s_float_space, float_cons): ..and err.
	* as.h (as_warn_value_out_of_range, as_bad_value_out_of_range,
	ieee_md_atof, vax_md_atof): Update prototypes.
	* tc.h (md_atof): Update prototype.
	* config/atof-ieee.c (ieee_md_atof): Return const char*.
	* config/atof-vax.c (vax_md_atof): Likewise.
	* config/obj-elf.c (obj_elf_parse_section_letters): Constify bad_msg.
	* config/tc-aarch64.c (md_atof): Return const char*.
	* config/tc-alpha.c (s_alpha_section_name): Likewise.
	(s_alpha_comm): Constify sec_name.
	(section_name): Constify.
	(s_alpha_section): Consify name..
	(alpha_elf_section_letter): ..and ptr_msg param..
	(md_atof): ..and return.
	* config/tc-alpha.h (alpha_elf_section_letter): Update prototype.
	* config/tc-arc.c (md_atof): Return const char*.
	* config/tc-arm.c (md_atof): Likewise.
	* config/tc-avr.c (md_atof): Likewise.
	* config/tc-bfin.c (md_atof): Likewise.
	* config/tc-cr16.c (md_atof): Likewise.
	* config/tc-cris.c (md_atof): Likewise.
	* config/tc-crx.c (md_atof): Likewise.
	* config/tc-d10v.c (md_atof): Likewise.
	* config/tc-d30v.c (md_atof): Likewise.
	* config/tc-dlx.c (md_atof): Likewise.
	* config/tc-epiphany.c (md_atof): Likewise.
	* config/tc-fr30.c (md_atof): Likewise.
	* config/tc-frv.c (md_atof): Likewise.
	* config/tc-ft32.c (md_atof): Likewise.
	* config/tc-h8300.c (md_atof): Likewise.
	* config/tc-hppa.c (struct default_subspace_dict): Constify name.
	(struct default_space_dict): Likewise.
	(create_new_space): Constify name param.
	(create_new_subspace): Likewise.
	(is_defined_space, is_defined_subspace): Likewise.
	(pa_parse_space_stmt): Constify space_name param.
	(md_atof): Return const char*.
	(pa_spaces_begin): Constify name.
	* config/tc-i370.c (md_atof): Return const char*.
	* config/tc-i386.c (md_atof): Likewise.
	(x86_64_section_letter): Constify ptr_msg param.
	* config/tc-i386.h (x86_64_section_letter): Update prototype.
	* config/tc-i860.c (struct i860_it): Constify error.
	(md_atof): Return const char*.
	* config/tc-i960.c (md_atof): Likewise.
	* config/tc-ia64.c (md_atof): Likewise.
	(ia64_elf_section_letter): Constify ptr_msg param.
	* config/tc-ia64.h (ia64_elf_section_letter): Update prototype.
	* config/tc-ip2k.c (md_atof): Return const char*.
	* config/tc-iq2000.c (md_atof): Likewise.
	* config/tc-lm32.c (md_atof): Likewise.
	* config/tc-m32c.c (md_atof): Likewise.
	* config/tc-m32r.c (md_atof): Likewise.
	* config/tc-m68hc11.c (md_atof): Likewise.
	* config/tc-m68k.c (md_atof): Likewise.
	* config/tc-mcore.c (md_atof): Likewise.
	* config/tc-mep.c (md_atof): Likewise.
	(mep_elf_section_letter): Constify ptr_msg param.
	* config/tc-mep.h (mep_elf_section_letter): Update prototype.
	* config/tc-metag.c (md_atof): Return const char*.
	* config/tc-microblaze.c (md_atof): Likewise.
	* config/tc-microblaze.h (md_atof): Delete prototype.
	* config/tc-mips.c (mips_parse_argument_token): Constify err.
	(md_atof): Return const char*.
	* config/tc-mmix.c (md_atof): Likewise.
	* config/tc-mn10200.c (md_atof): Likewise.
	* config/tc-mn10300.c (md_atof): Likewise.
	* config/tc-moxie.c (md_atof): Likewise.
	* config/tc-msp430.c (md_atof): Likewise.
	* config/tc-mt.c (md_atof): Likewise.
	* config/tc-nds32.c (md_atof): Likewise.
	* config/tc-nios2.c (md_atof): Likewise.
	(nios2_elf_section_letter): Constify ptr_msg param.
	* config/tc-nios2.h (nios2_elf_section_letter): Update prototype.
	* config/tc-ns32k.c (md_atof): Return const char*.
	* config/tc-or1k.c (md_atof): Likewise.
	* config/tc-pdp11.c (struct pdp11_code): Constify error.
	(md_atof): Return const char*.
	* config/tc-pj.c (md_atof): Likewise.
	* config/tc-ppc.c (md_atof): Likewise.
	* config/tc-rl78.c (md_atof): Likewise.
	* config/tc-rx.c (md_atof): Likewise.
	* config/tc-s390.c (md_atof): Likewise.
	* config/tc-score.c (s3_atof, md_atof): Likewise.
	* config/tc-sh.c (md_atof): Likewise.
	* config/tc-sparc.c (struct sparc_it): Constify error.
	(md_atof): Return const char*.
	* config/tc-spu.c (md_atof): Likewise.
	* config/tc-tic30.c (md_atof): Likewise.
	* config/tc-tic4x.c (md_atof): Likewise.
	* config/tc-tic54x.c (md_atof): Likewise.
	* config/tc-tic6x.c (md_atof): Likewise.
	* config/tc-tilegx.c (md_atof): Likewise.
	* config/tc-tilepro.c (md_atof): Likewise.
	* config/tc-v850.c (parse_register_list, md_atof): Likewise.
	* config/tc-vax.c (md_atof): Likewise.
	* config/tc-visium.c (md_atof): Likewise.
	* config/tc-xc16x.c (md_atof): Likewise.
	* config/tc-xgate.c (md_atof): Likewise.
	* config/tc-xstormy16.c (md_atof): Likewise.
	* config/tc-xtensa.c (md_atof): Likewise.
	* config/tc-z80.c (md_atof): Likewise.
	* config/tc-z8k.c (md_atof): Likewise.

85 files changed, 261 insertions, 148 deletions

diff --git a/gas/ChangeLog b/gas/ChangeLog
index 3294a8f..c9a762d 100644
--- a/gas/ChangeLog
+++ b/gas/ChangeLog
@@ -1,3 +1,114 @@
+2016-04-01  Alan Modra  <amodra@gmail.com>
+
+	* cgen.c (weak_operand_overflow_check): Return const char*.
+	* messages.c (as_internal_value_out_of_range): Formatting.
+	(as_warn_value_out_of_range): Consify prefix param.
+	(as_bad_value_out_of_range): Likewise.
+	* read.c (s_errwarn): Constify msg..
+	(s_float_space, float_cons): ..and err.
+	* as.h (as_warn_value_out_of_range, as_bad_value_out_of_range,
+	ieee_md_atof, vax_md_atof): Update prototypes.
+	* tc.h (md_atof): Update prototype.
+	* config/atof-ieee.c (ieee_md_atof): Return const char*.
+	* config/atof-vax.c (vax_md_atof): Likewise.
+	* config/obj-elf.c (obj_elf_parse_section_letters): Constify bad_msg.
+	* config/tc-aarch64.c (md_atof): Return const char*.
+	* config/tc-alpha.c (s_alpha_section_name): Likewise.
+	(s_alpha_comm): Constify sec_name.
+	(section_name): Constify.
+	(s_alpha_section): Consify name..
+	(alpha_elf_section_letter): ..and ptr_msg param..
+	(md_atof): ..and return.
+	* config/tc-alpha.h (alpha_elf_section_letter): Update prototype.
+	* config/tc-arc.c (md_atof): Return const char*.
+	* config/tc-arm.c (md_atof): Likewise.
+	* config/tc-avr.c (md_atof): Likewise.
+	* config/tc-bfin.c (md_atof): Likewise.
+	* config/tc-cr16.c (md_atof): Likewise.
+	* config/tc-cris.c (md_atof): Likewise.
+	* config/tc-crx.c (md_atof): Likewise.
+	* config/tc-d10v.c (md_atof): Likewise.
+	* config/tc-d30v.c (md_atof): Likewise.
+	* config/tc-dlx.c (md_atof): Likewise.
+	* config/tc-epiphany.c (md_atof): Likewise.
+	* config/tc-fr30.c (md_atof): Likewise.
+	* config/tc-frv.c (md_atof): Likewise.
+	* config/tc-ft32.c (md_atof): Likewise.
+	* config/tc-h8300.c (md_atof): Likewise.
+	* config/tc-hppa.c (struct default_subspace_dict): Constify name.
+	(struct default_space_dict): Likewise.
+	(create_new_space): Constify name param.
+	(create_new_subspace): Likewise.
+	(is_defined_space, is_defined_subspace): Likewise.
+	(pa_parse_space_stmt): Constify space_name param.
+	(md_atof): Return const char*.
+	(pa_spaces_begin): Constify name.
+	* config/tc-i370.c (md_atof): Return const char*.
+	* config/tc-i386.c (md_atof): Likewise.
+	(x86_64_section_letter): Constify ptr_msg param.
+	* config/tc-i386.h (x86_64_section_letter): Update prototype.
+	* config/tc-i860.c (struct i860_it): Constify error.
+	(md_atof): Return const char*.
+	* config/tc-i960.c (md_atof): Likewise.
+	* config/tc-ia64.c (md_atof): Likewise.
+	(ia64_elf_section_letter): Constify ptr_msg param.
+	* config/tc-ia64.h (ia64_elf_section_letter): Update prototype.
+	* config/tc-ip2k.c (md_atof): Return const char*.
+	* config/tc-iq2000.c (md_atof): Likewise.
+	* config/tc-lm32.c (md_atof): Likewise.
+	* config/tc-m32c.c (md_atof): Likewise.
+	* config/tc-m32r.c (md_atof): Likewise.
+	* config/tc-m68hc11.c (md_atof): Likewise.
+	* config/tc-m68k.c (md_atof): Likewise.
+	* config/tc-mcore.c (md_atof): Likewise.
+	* config/tc-mep.c (md_atof): Likewise.
+	(mep_elf_section_letter): Constify ptr_msg param.
+	* config/tc-mep.h (mep_elf_section_letter): Update prototype.
+	* config/tc-metag.c (md_atof): Return const char*.
+	* config/tc-microblaze.c (md_atof): Likewise.
+	* config/tc-microblaze.h (md_atof): Delete prototype.
+	* config/tc-mips.c (mips_parse_argument_token): Constify err.
+	(md_atof): Return const char*.
+	* config/tc-mmix.c (md_atof): Likewise.
+	* config/tc-mn10200.c (md_atof): Likewise.
+	* config/tc-mn10300.c (md_atof): Likewise.
+	* config/tc-moxie.c (md_atof): Likewise.
+	* config/tc-msp430.c (md_atof): Likewise.
+	* config/tc-mt.c (md_atof): Likewise.
+	* config/tc-nds32.c (md_atof): Likewise.
+	* config/tc-nios2.c (md_atof): Likewise.
+	(nios2_elf_section_letter): Constify ptr_msg param.
+	* config/tc-nios2.h (nios2_elf_section_letter): Update prototype.
+	* config/tc-ns32k.c (md_atof): Return const char*.
+	* config/tc-or1k.c (md_atof): Likewise.
+	* config/tc-pdp11.c (struct pdp11_code): Constify error.
+	(md_atof): Return const char*.
+	* config/tc-pj.c (md_atof): Likewise.
+	* config/tc-ppc.c (md_atof): Likewise.
+	* config/tc-rl78.c (md_atof): Likewise.
+	* config/tc-rx.c (md_atof): Likewise.
+	* config/tc-s390.c (md_atof): Likewise.
+	* config/tc-score.c (s3_atof, md_atof): Likewise.
+	* config/tc-sh.c (md_atof): Likewise.
+	* config/tc-sparc.c (struct sparc_it): Constify error.
+	(md_atof): Return const char*.
+	* config/tc-spu.c (md_atof): Likewise.
+	* config/tc-tic30.c (md_atof): Likewise.
+	* config/tc-tic4x.c (md_atof): Likewise.
+	* config/tc-tic54x.c (md_atof): Likewise.
+	* config/tc-tic6x.c (md_atof): Likewise.
+	* config/tc-tilegx.c (md_atof): Likewise.
+	* config/tc-tilepro.c (md_atof): Likewise.
+	* config/tc-v850.c (parse_register_list, md_atof): Likewise.
+	* config/tc-vax.c (md_atof): Likewise.
+	* config/tc-visium.c (md_atof): Likewise.
+	* config/tc-xc16x.c (md_atof): Likewise.
+	* config/tc-xgate.c (md_atof): Likewise.
+	* config/tc-xstormy16.c (md_atof): Likewise.
+	* config/tc-xtensa.c (md_atof): Likewise.
+	* config/tc-z80.c (md_atof): Likewise.
+	* config/tc-z8k.c (md_atof): Likewise.
+
 2016-03-31  Trevor Saunders  <tbsaunde+binutils@tbsaunde.org>
 
 	* config/tc-xtensa.c (struct rename_section_struct): Make old_name
diff --git a/gas/as.h b/gas/as.h
index ba2fb7d..9ff8bb8 100644
--- a/gas/as.h
+++ b/gas/as.h
@@ -477,15 +477,15 @@ void   as_abort (const char *, int, const char *) ATTRIBUTE_NORETURN;
 void   sprint_value (char *, addressT);
 int    had_errors (void);
 int    had_warnings (void);
-void   as_warn_value_out_of_range (char *, offsetT, offsetT, offsetT,
+void   as_warn_value_out_of_range (const char *, offsetT, offsetT, offsetT,
 				   const char *, unsigned);
-void   as_bad_value_out_of_range (char *, offsetT, offsetT, offsetT,
+void   as_bad_value_out_of_range (const char *, offsetT, offsetT, offsetT,
 				  const char *, unsigned);
 void   print_version_id (void);
 char * app_push (void);
 char * atof_ieee (char *, int, LITTLENUM_TYPE *);
-char * ieee_md_atof (int, char *, int *, bfd_boolean);
-char * vax_md_atof (int, char *, int *);
+const char * ieee_md_atof (int, char *, int *, bfd_boolean);
+const char * vax_md_atof (int, char *, int *);
 char * input_scrub_include_file (const char *, char *);
 void   input_scrub_insert_line (const char *);
 void   input_scrub_insert_file (char *);
diff --git a/gas/cgen.c b/gas/cgen.c
index 41eaa55..c04a921 100644
--- a/gas/cgen.c
+++ b/gas/cgen.c
@@ -37,7 +37,7 @@ static unsigned long gas_cgen_encode_addend
    const unsigned long, const unsigned long, const unsigned long, \
    const unsigned long);
 
-static char * weak_operand_overflow_check
+static const char * weak_operand_overflow_check
   (const expressionS *, const CGEN_OPERAND *);
 
 static void queue_fixup_recursively
@@ -748,7 +748,7 @@ gas_cgen_encode_addend (const unsigned long start,    /* in bits */
    overflow, so signal it by returning an error string. Any other case is
    ambiguous, so we assume it's OK and return NULL.  */
 
-static char *
+static const char *
 weak_operand_overflow_check (const expressionS *  exp,
 			     const CGEN_OPERAND * operand)
 {
diff --git a/gas/config/atof-ieee.c b/gas/config/atof-ieee.c
index 92c367d..636549e 100644
--- a/gas/config/atof-ieee.c
+++ b/gas/config/atof-ieee.c
@@ -710,7 +710,7 @@ extern const char FLT_CHARS[];
 
    An error message is returned, or a NULL pointer if everything went OK.  */
 
-char *
+const char *
 ieee_md_atof (int type,
 	      char *litP,
 	      int *sizeP,
diff --git a/gas/config/atof-vax.c b/gas/config/atof-vax.c
index 7c05390..8ca80b0 100644
--- a/gas/config/atof-vax.c
+++ b/gas/config/atof-vax.c
@@ -387,7 +387,7 @@ flonum_gen2vax (int format_letter,	/* One of 'd' 'f' 'g' 'h'.  */
 
 #define MAXIMUM_NUMBER_OF_LITTLENUMS  8 	/* For .hfloats.  */
 
-char *
+const char *
 vax_md_atof (int what_statement_type,
 	     char *literalP,
 	     int *sizeP)
diff --git a/gas/config/obj-elf.c b/gas/config/obj-elf.c
index 40c6e35..1d07d4b 100644
--- a/gas/config/obj-elf.c
+++ b/gas/config/obj-elf.c
@@ -815,7 +815,8 @@ obj_elf_parse_section_letters (char *str, size_t len, bfd_boolean *is_clone)
 	    }
 	default:
 	  {
-	    char *bad_msg = _("unrecognized .section attribute: want a,e,w,x,M,S,G,T or number");
+	    const char *bad_msg = _("unrecognized .section attribute:"
+				    " want a,e,w,x,M,S,G,T or number");
 #ifdef md_elf_section_letter
 	    bfd_vma md_attr = md_elf_section_letter (*str, &bad_msg);
 	    if (md_attr != (bfd_vma) -1)
diff --git a/gas/config/tc-aarch64.c b/gas/config/tc-aarch64.c
index 0e00259..14b6011 100644
--- a/gas/config/tc-aarch64.c
+++ b/gas/config/tc-aarch64.c
@@ -573,7 +573,7 @@ my_get_expression (expressionS * ep, char **str, int prefix_mode,
    of LITTLENUMS emitted is stored in *SIZEP.  An error message is
    returned, or NULL on OK.  */
 
-char *
+const char *
 md_atof (int type, char *litP, int *sizeP)
 {
   return ieee_md_atof (type, litP, sizeP, target_big_endian);
diff --git a/gas/config/tc-alpha.c b/gas/config/tc-alpha.c
index 5fa1403..5fe9cb6 100644
--- a/gas/config/tc-alpha.c
+++ b/gas/config/tc-alpha.c
@@ -578,7 +578,7 @@ static void assemble_insn (const struct alpha_opcode *, const expressionS *, int
 static void emit_insn (struct alpha_insn *);
 static void assemble_tokens (const char *, const expressionS *, int, int);
 #ifdef OBJ_EVAX
-static char *s_alpha_section_name (void);
+static const char *s_alpha_section_name (void);
 static symbolS *add_to_link_pool (symbolS *, offsetT);
 #endif
 
@@ -3552,7 +3552,7 @@ s_alpha_comm (int ignore ATTRIBUTE_UNUSED)
          The symbol is effectively an alias for the section name.  */
 
       segT sec;
-      char *sec_name;
+      const char *sec_name;
       symbolS *sec_symbol;
       segT current_seg = now_seg;
       subsegT current_subseg = now_subseg;
@@ -4184,7 +4184,7 @@ alpha_cfi_frame_initial_instructions (void)
 #ifdef OBJ_EVAX
 
 /* Get name of section.  */
-static char *
+static const char *
 s_alpha_section_name (void)
 {
   char *name;
@@ -4292,13 +4292,14 @@ s_alpha_section_word (char *str, size_t len)
 
 #define EVAX_SECTION_COUNT 5
 
-static char *section_name[EVAX_SECTION_COUNT + 1] =
+static const char *section_name[EVAX_SECTION_COUNT + 1] =
   { "NULL", ".rdata", ".comm", ".link", ".ctors", ".dtors" };
 
 static void
 s_alpha_section (int secid)
 {
-  char *name, *beg;
+  const char *name;
+  char *beg;
   segT sec;
   flagword vms_flags = 0;
   symbolS *symbol;
@@ -5340,7 +5341,7 @@ select_gp_value (void)
 /* Map 's' to SHF_ALPHA_GPREL.  */
 
 bfd_vma
-alpha_elf_section_letter (int letter, char **ptr_msg)
+alpha_elf_section_letter (int letter, const char **ptr_msg)
 {
   if (letter == 's')
     return SHF_ALPHA_GPREL;
@@ -5579,10 +5580,10 @@ md_section_align (segT seg, valueT size)
    of LITTLENUMS emitted is stored in *SIZEP.  An error message is
    returned, or NULL on OK.  */
 
-char *
+const char *
 md_atof (int type, char *litP, int *sizeP)
 {
-  extern char *vax_md_atof (int, char *, int *);
+  extern const char *vax_md_atof (int, char *, int *);
 
   switch (type)
     {
diff --git a/gas/config/tc-alpha.h b/gas/config/tc-alpha.h
index 326f23b..1a7badc 100644
--- a/gas/config/tc-alpha.h
+++ b/gas/config/tc-alpha.h
@@ -122,7 +122,7 @@ extern void alpha_frob_file_before_adjust (void);
 
 #ifdef OBJ_ELF
 #define md_elf_section_letter		alpha_elf_section_letter
-extern bfd_vma alpha_elf_section_letter (int, char **);
+extern bfd_vma alpha_elf_section_letter (int, const char **);
 #define md_elf_section_flags		alpha_elf_section_flags
 extern flagword alpha_elf_section_flags (flagword, bfd_vma, int);
 #endif
diff --git a/gas/config/tc-arc.c b/gas/config/tc-arc.c
index 3f4e2d3..f3f7e26 100644
--- a/gas/config/tc-arc.c
+++ b/gas/config/tc-arc.c
@@ -2848,7 +2848,7 @@ md_undefined_symbol (char *name)
    of LITTLENUMS emitted is stored in *sizeP.  An error message is
    returned, or NULL on OK.  */
 
-char *
+const char *
 md_atof (int type, char *litP, int *sizeP)
 {
   return ieee_md_atof (type, litP, sizeP, target_big_endian);
diff --git a/gas/config/tc-arm.c b/gas/config/tc-arm.c
index 2c42a13..2ccc053 100644
--- a/gas/config/tc-arm.c
+++ b/gas/config/tc-arm.c
@@ -1077,7 +1077,7 @@ my_get_expression (expressionS * ep, char ** str, int prefix_mode)
 
    ??? The format of 12 byte floats is uncertain according to gcc's arm.h.  */
 
-char *
+const char *
 md_atof (int type, char * litP, int * sizeP)
 {
   int prec;
diff --git a/gas/config/tc-avr.c b/gas/config/tc-avr.c
index b35061e..852002f 100644
--- a/gas/config/tc-avr.c
+++ b/gas/config/tc-avr.c
@@ -628,7 +628,7 @@ md_undefined_symbol (char *name ATTRIBUTE_UNUSED)
   return NULL;
 }
 
-char *
+const char *
 md_atof (int type, char *litP, int *sizeP)
 {
   return ieee_md_atof (type, litP, sizeP, FALSE);
diff --git a/gas/config/tc-bfin.c b/gas/config/tc-bfin.c
index 6dce28c..caa89c6 100644
--- a/gas/config/tc-bfin.c
+++ b/gas/config/tc-bfin.c
@@ -798,7 +798,7 @@ md_section_align (segT segment, valueT size)
 }
 
 
-char *
+const char *
 md_atof (int type, char * litP, int * sizeP)
 {
   return ieee_md_atof (type, litP, sizeP, FALSE);
diff --git a/gas/config/tc-cr16.c b/gas/config/tc-cr16.c
index 45201ca..119f130 100644
--- a/gas/config/tc-cr16.c
+++ b/gas/config/tc-cr16.c
@@ -715,7 +715,7 @@ md_show_usage (FILE *stream ATTRIBUTE_UNUSED)
   return;
 }
 
-char *
+const char *
 md_atof (int type, char *litP, int *sizeP)
 {
   return ieee_md_atof (type, litP, sizeP, target_big_endian);
diff --git a/gas/config/tc-cris.c b/gas/config/tc-cris.c
index 89343f0..536e6cb 100644
--- a/gas/config/tc-cris.c
+++ b/gas/config/tc-cris.c
@@ -3591,7 +3591,7 @@ cris_get_reloc_suffix (char **cPP, bfd_reloc_code_real_type *relocp,
    code as assembly code, but if they do, they should be able enough to
    find out the correct bit patterns and use them.  */
 
-char *
+const char *
 md_atof (int type ATTRIBUTE_UNUSED, char *litp ATTRIBUTE_UNUSED,
 	 int *sizep ATTRIBUTE_UNUSED)
 {
diff --git a/gas/config/tc-crx.c b/gas/config/tc-crx.c
index 40a2806..7c8d7ed 100644
--- a/gas/config/tc-crx.c
+++ b/gas/config/tc-crx.c
@@ -464,7 +464,7 @@ md_show_usage (FILE *stream ATTRIBUTE_UNUSED)
   return;
 }
 
-char *
+const char *
 md_atof (int type, char *litP, int *sizeP)
 {
   return ieee_md_atof (type, litP, sizeP, target_big_endian);
diff --git a/gas/config/tc-d10v.c b/gas/config/tc-d10v.c
index f7f213a..e2a2caa 100644
--- a/gas/config/tc-d10v.c
+++ b/gas/config/tc-d10v.c
@@ -251,7 +251,7 @@ md_undefined_symbol (char *name ATTRIBUTE_UNUSED)
   return 0;
 }
 
-char *
+const char *
 md_atof (int type, char *litP, int *sizeP)
 {
   return ieee_md_atof (type, litP, sizeP, TRUE);
diff --git a/gas/config/tc-d30v.c b/gas/config/tc-d30v.c
index 81051f0..ae870ee 100644
--- a/gas/config/tc-d30v.c
+++ b/gas/config/tc-d30v.c
@@ -285,7 +285,7 @@ md_undefined_symbol (char *name ATTRIBUTE_UNUSED)
   return 0;
 }
 
-char *
+const char *
 md_atof (int type, char *litP, int *sizeP)
 {
   return ieee_md_atof (type, litP, sizeP, TRUE);
diff --git a/gas/config/tc-dlx.c b/gas/config/tc-dlx.c
index 970e297..a806fe6 100644
--- a/gas/config/tc-dlx.c
+++ b/gas/config/tc-dlx.c
@@ -974,7 +974,7 @@ md_assemble (char *str)
    but I'm not sure.  Dlx will not use it anyway, so I just leave it
    here for now.  */
 
-char *
+const char *
 md_atof (int type, char *litP, int *sizeP)
 {
   return ieee_md_atof (type, litP, sizeP, TRUE);
diff --git a/gas/config/tc-epiphany.c b/gas/config/tc-epiphany.c
index 132a78f..f35198e 100644
--- a/gas/config/tc-epiphany.c
+++ b/gas/config/tc-epiphany.c
@@ -1012,7 +1012,7 @@ md_cgen_lookup_reloc (const CGEN_INSN *insn ATTRIBUTE_UNUSED,
 /* Equal to MAX_PRECISION in atof-ieee.c.  */
 #define MAX_LITTLENUMS 6
 
-char *
+const char *
 md_atof (int type, char *litP, int *sizeP)
 {
   return ieee_md_atof (type, litP, sizeP, FALSE);
diff --git a/gas/config/tc-fr30.c b/gas/config/tc-fr30.c
index ad3ffd0..058733b 100644
--- a/gas/config/tc-fr30.c
+++ b/gas/config/tc-fr30.c
@@ -317,7 +317,7 @@ md_number_to_chars (char * buf, valueT val, int n)
   number_to_chars_bigendian (buf, val, n);
 }
 
-char *
+const char *
 md_atof (int type, char * litP, int * sizeP)
 {
   return ieee_md_atof (type, litP, sizeP, TRUE);
diff --git a/gas/config/tc-frv.c b/gas/config/tc-frv.c
index 24baa96..61d17a7 100644
--- a/gas/config/tc-frv.c
+++ b/gas/config/tc-frv.c
@@ -1513,7 +1513,7 @@ frv_md_number_to_chars (char *buf, valueT val, int n)
   number_to_chars_bigendian (buf, val, n);
 }
 
-char *
+const char *
 md_atof (int type, char *litP, int *sizeP)
 {
   return ieee_md_atof (type, litP, sizeP, TRUE);
diff --git a/gas/config/tc-ft32.c b/gas/config/tc-ft32.c
index 327b393..56c0a68 100644
--- a/gas/config/tc-ft32.c
+++ b/gas/config/tc-ft32.c
@@ -408,7 +408,7 @@ md_assemble (char *str)
    of LITTLENUMS emitted is stored in *SIZEP .  An error message is
    returned, or NULL on OK.  */
 
-char *
+const char *
 md_atof (int type, char *litP, int *sizeP)
 {
   int prec;
diff --git a/gas/config/tc-h8300.c b/gas/config/tc-h8300.c
index f50f497..edca456 100644
--- a/gas/config/tc-h8300.c
+++ b/gas/config/tc-h8300.c
@@ -2101,7 +2101,7 @@ md_undefined_symbol (char *name ATTRIBUTE_UNUSED)
 
 /* Various routines to kill one day.  */
 
-char *
+const char *
 md_atof (int type, char *litP, int *sizeP)
 {
   return ieee_md_atof (type, litP, sizeP, TRUE);
diff --git a/gas/config/tc-hppa.c b/gas/config/tc-hppa.c
index c2001bd..82d33c2 100644
--- a/gas/config/tc-hppa.c
+++ b/gas/config/tc-hppa.c
@@ -350,7 +350,7 @@ typedef struct space_dictionary_chain sd_chain_struct;
 struct default_subspace_dict
   {
     /* Name of the subspace.  */
-    char *name;
+    const char *name;
 
     /* FIXME.  Is this still needed?  */
     char defined;
@@ -403,7 +403,7 @@ struct default_subspace_dict
 struct default_space_dict
   {
     /* Name of the space.  */
-    char *name;
+    const char *name;
 
     /* Space number.  It is possible to identify spaces within
        assembly code numerically!  */
@@ -503,27 +503,27 @@ static void pa_align (int);
 static void pa_space (int);
 static void pa_spnum (int);
 static void pa_subspace (int);
-static sd_chain_struct *create_new_space (char *, int, int,
-						  int, int, int,
-						  asection *, int);
+static sd_chain_struct *create_new_space (const char *, int, int,
+					  int, int, int,
+					  asection *, int);
 static ssd_chain_struct *create_new_subspace (sd_chain_struct *,
-						      char *, int, int,
-						      int, int, int, int,
-						      int, int, int, int,
-						      int, asection *);
+					      const char *, int, int,
+					      int, int, int, int,
+					      int, int, int, int,
+					      int, asection *);
 static ssd_chain_struct *update_subspace (sd_chain_struct *,
-						  char *, int, int, int,
-						  int, int, int, int,
-						  int, int, int, int,
-						  asection *);
-static sd_chain_struct *is_defined_space (char *);
-static ssd_chain_struct *is_defined_subspace (char *);
+					  char *, int, int, int,
+					  int, int, int, int,
+					  int, int, int, int,
+					  asection *);
+static sd_chain_struct *is_defined_space (const char *);
+static ssd_chain_struct *is_defined_subspace (const char *);
 static sd_chain_struct *pa_segment_to_space (asection *);
 static ssd_chain_struct *pa_subsegment_to_subspace (asection *,
 							    subsegT);
 static sd_chain_struct *pa_find_space_by_number (int);
 static unsigned int pa_subspace_start (sd_chain_struct *, int);
-static sd_chain_struct *pa_parse_space_stmt (char *, int);
+static sd_chain_struct *pa_parse_space_stmt (const char *, int);
 #endif
 
 /* File and globally scoped variable declarations.  */
@@ -1319,7 +1319,7 @@ pa_parse_nullif (char **s)
   return nullif;
 }
 
-char *
+const char *
 md_atof (int type, char *litP, int *sizeP)
 {
   return ieee_md_atof (type, litP, sizeP, TRUE);
@@ -7080,7 +7080,7 @@ pa_check_current_space_and_subspace (void)
    by the parameters to the .SPACE directive.  */
 
 static sd_chain_struct *
-pa_parse_space_stmt (char *space_name, int create_flag)
+pa_parse_space_stmt (const char *space_name, int create_flag)
 {
   char *name, *ptemp, c;
   char loadable, defined, private, sort;
@@ -7590,7 +7590,7 @@ pa_spaces_begin (void)
   i = 0;
   while (pa_def_spaces[i].name)
     {
-      char *name;
+      const char *name;
 
       /* Pick the right name to use for the new section.  */
       name = pa_def_spaces[i].name;
@@ -7606,7 +7606,7 @@ pa_spaces_begin (void)
   i = 0;
   while (pa_def_subspaces[i].name)
     {
-      char *name;
+      const char *name;
       int applicable, subsegment;
       asection *segment = NULL;
       sd_chain_struct *space;
@@ -7707,7 +7707,7 @@ pa_spaces_begin (void)
    by the given parameters.  */
 
 static sd_chain_struct *
-create_new_space (char *name,
+create_new_space (const char *name,
 		  int spnum,
 		  int loadable ATTRIBUTE_UNUSED,
 		  int defined,
@@ -7789,7 +7789,7 @@ create_new_space (char *name,
 
 static ssd_chain_struct *
 create_new_subspace (sd_chain_struct *space,
-		     char *name,
+		     const char *name,
 		     int loadable ATTRIBUTE_UNUSED,
 		     int code_only ATTRIBUTE_UNUSED,
 		     int comdat,
@@ -7893,7 +7893,7 @@ update_subspace (sd_chain_struct *space,
    NULL if no such space exists.  */
 
 static sd_chain_struct *
-is_defined_space (char *name)
+is_defined_space (const char *name)
 {
   sd_chain_struct *chain_pointer;
 
@@ -7942,7 +7942,7 @@ pa_segment_to_space (asection *seg)
    own subspace.  */
 
 static ssd_chain_struct *
-is_defined_subspace (char *name)
+is_defined_subspace (const char *name)
 {
   sd_chain_struct *space_chain;
   ssd_chain_struct *subspace_chain;
diff --git a/gas/config/tc-i370.c b/gas/config/tc-i370.c
index 1b419e8..7e2f146 100644
--- a/gas/config/tc-i370.c
+++ b/gas/config/tc-i370.c
@@ -2352,7 +2352,7 @@ i370_tc (int ignore ATTRIBUTE_UNUSED)
     }
 }
 
-char *
+const char *
 md_atof (int type, char *litp, int *sizep)
 {
   /* 360/370/390 have two float formats: an old, funky 360 single-precision
diff --git a/gas/config/tc-i386.c b/gas/config/tc-i386.c
index 55ca5c3..ce5304d 100644
--- a/gas/config/tc-i386.c
+++ b/gas/config/tc-i386.c
@@ -9378,7 +9378,7 @@ md_apply_fix (fixS *fixP, valueT *valP, segT seg ATTRIBUTE_UNUSED)
   md_number_to_chars (p, value, fixP->fx_size);
 }
 
-char *
+const char *
 md_atof (int type, char *litP, int *sizeP)
 {
   /* This outputs the LITTLENUMs in REVERSE order;
@@ -10781,7 +10781,7 @@ tc_pe_dwarf2_emit_offset (symbolS *symbol, unsigned int size)
 /* For ELF on x86-64, add support for SHF_X86_64_LARGE.  */
 
 bfd_vma
-x86_64_section_letter (int letter, char **ptr_msg)
+x86_64_section_letter (int letter, const char **ptr_msg)
 {
   if (flag_code == CODE_64BIT)
     {
diff --git a/gas/config/tc-i386.h b/gas/config/tc-i386.h
index 006dacb..7a987d8 100644
--- a/gas/config/tc-i386.h
+++ b/gas/config/tc-i386.h
@@ -310,7 +310,7 @@ extern void i386_solaris_fix_up_eh_frame (segT);
 
 /* Support for SHF_X86_64_LARGE */
 extern bfd_vma x86_64_section_word (char *, size_t);
-extern bfd_vma x86_64_section_letter (int, char **);
+extern bfd_vma x86_64_section_letter (int, const char **);
 #define md_elf_section_letter(LETTER, PTR_MSG)	x86_64_section_letter (LETTER, PTR_MSG)
 #define md_elf_section_word(STR, LEN)		x86_64_section_word (STR, LEN)
 
diff --git a/gas/config/tc-i860.c b/gas/config/tc-i860.c
index ea21669..85855e9 100644
--- a/gas/config/tc-i860.c
+++ b/gas/config/tc-i860.c
@@ -53,7 +53,7 @@ static char reg_prefix;
 
 struct i860_it
 {
-  char *error;
+  const char *error;
   unsigned long opcode;
   enum expand_type expand;
   struct i860_fi
@@ -1010,7 +1010,7 @@ i860_get_expression (char *str)
   return 0;
 }
 
-char *
+const char *
 md_atof (int type, char *litP, int *sizeP)
 {
   return ieee_md_atof (type, litP, sizeP, TRUE);
diff --git a/gas/config/tc-i960.c b/gas/config/tc-i960.c
index 667ab4c..1335da1 100644
--- a/gas/config/tc-i960.c
+++ b/gas/config/tc-i960.c
@@ -1707,7 +1707,7 @@ md_number_to_chars (char *buf,
   number_to_chars_littleendian (buf, value, n);
 }
 
-char *
+const char *
 md_atof (int type, char *litP, int *sizeP)
 {
   return ieee_md_atof (type, litP, sizeP, FALSE);
diff --git a/gas/config/tc-ia64.c b/gas/config/tc-ia64.c
index a50b61e..8da09e0 100644
--- a/gas/config/tc-ia64.c
+++ b/gas/config/tc-ia64.c
@@ -856,7 +856,7 @@ set_section (char *name)
 /* Map 's' to SHF_IA_64_SHORT.  */
 
 bfd_vma
-ia64_elf_section_letter (int letter, char **ptr_msg)
+ia64_elf_section_letter (int letter, const char **ptr_msg)
 {
   if (letter == 's')
     return SHF_IA_64_SHORT;
@@ -11576,7 +11576,7 @@ tc_gen_reloc (asection *sec ATTRIBUTE_UNUSED, fixS *fixp)
 
 #define MAX_LITTLENUMS 5
 
-char *
+const char *
 md_atof (int type, char *lit, int *size)
 {
   LITTLENUM_TYPE words[MAX_LITTLENUMS];
diff --git a/gas/config/tc-ia64.h b/gas/config/tc-ia64.h
index 4858c27..dcf07ec 100644
--- a/gas/config/tc-ia64.h
+++ b/gas/config/tc-ia64.h
@@ -110,7 +110,7 @@ extern void ia64_cons_fix_new (fragS *, int, int, expressionS *,
 			       bfd_reloc_code_real_type);
 extern void ia64_validate_fix (struct fix *);
 extern char * ia64_canonicalize_symbol_name (char *);
-extern bfd_vma ia64_elf_section_letter (int, char **);
+extern bfd_vma ia64_elf_section_letter (int, const char **);
 extern flagword ia64_elf_section_flags (flagword, bfd_vma, int);
 extern int ia64_elf_section_type (const char *, size_t);
 extern long ia64_pcrel_from_section (struct fix *, segT);
diff --git a/gas/config/tc-ip2k.c b/gas/config/tc-ip2k.c
index 7e4d351..642dfea 100644
--- a/gas/config/tc-ip2k.c
+++ b/gas/config/tc-ip2k.c
@@ -311,7 +311,7 @@ md_number_to_chars (char * buf, valueT val, int n)
   number_to_chars_bigendian (buf, val, n);
 }
 
-char *
+const char *
 md_atof (int type, char * litP, int *  sizeP)
 {
   return ieee_md_atof (type, litP, sizeP, TRUE);
diff --git a/gas/config/tc-iq2000.c b/gas/config/tc-iq2000.c
index c5ccfca..f1f7945 100644
--- a/gas/config/tc-iq2000.c
+++ b/gas/config/tc-iq2000.c
@@ -724,7 +724,7 @@ md_operand (expressionS * exp)
     gas_cgen_md_operand (exp);
 }
 
-char *
+const char *
 md_atof (int type, char * litP, int * sizeP)
 {
   return ieee_md_atof (type, litP, sizeP, TRUE);
diff --git a/gas/config/tc-lm32.c b/gas/config/tc-lm32.c
index a20b9a0..5f7d703 100644
--- a/gas/config/tc-lm32.c
+++ b/gas/config/tc-lm32.c
@@ -214,7 +214,7 @@ md_number_to_chars (char * buf, valueT val, int n)
    of LITTLENUMS emitted is stored in *SIZEP.  An error message is
    returned, or NULL on OK.  */
 
-char *
+const char *
 md_atof (int type, char *litP, int *sizeP)
 {
   int i;
diff --git a/gas/config/tc-m32c.c b/gas/config/tc-m32c.c
index 5496f7e..0219d9b 100644
--- a/gas/config/tc-m32c.c
+++ b/gas/config/tc-m32c.c
@@ -1155,7 +1155,7 @@ md_number_to_chars (char * buf, valueT val, int n)
 /* Equal to MAX_PRECISION in atof-ieee.c.  */
 #define MAX_LITTLENUMS 6
 
-char *
+const char *
 md_atof (int type, char * litP, int * sizeP)
 {
   return ieee_md_atof (type, litP, sizeP, TRUE);
diff --git a/gas/config/tc-m32r.c b/gas/config/tc-m32r.c
index 89205f8..126ab9c 100644
--- a/gas/config/tc-m32r.c
+++ b/gas/config/tc-m32r.c
@@ -2106,7 +2106,7 @@ md_number_to_chars (char *buf, valueT val, int n)
 /* Equal to MAX_PRECISION in atof-ieee.c.  */
 #define MAX_LITTLENUMS 6
 
-char *
+const char *
 md_atof (int type, char *litP, int *sizeP)
 {
   return ieee_md_atof (type, litP, sizeP, target_big_endian);
diff --git a/gas/config/tc-m68hc11.c b/gas/config/tc-m68hc11.c
index 71fdb26..c61bded 100644
--- a/gas/config/tc-m68hc11.c
+++ b/gas/config/tc-m68hc11.c
@@ -574,7 +574,7 @@ md_undefined_symbol (char *name ATTRIBUTE_UNUSED)
   return 0;
 }
 
-char *
+const char *
 md_atof (int type, char *litP, int *sizeP)
 {
   return ieee_md_atof (type, litP, sizeP, TRUE);
diff --git a/gas/config/tc-m68k.c b/gas/config/tc-m68k.c
index b89f0a9..f148845 100644
--- a/gas/config/tc-m68k.c
+++ b/gas/config/tc-m68k.c
@@ -4879,7 +4879,7 @@ m68k_mri_mode_change (int on)
     }
 }
 
-char *
+const char *
 md_atof (int type, char *litP, int *sizeP)
 {
   return ieee_md_atof (type, litP, sizeP, TRUE);
diff --git a/gas/config/tc-mcore.c b/gas/config/tc-mcore.c
index dc5c95d..67d1ea8 100644
--- a/gas/config/tc-mcore.c
+++ b/gas/config/tc-mcore.c
@@ -1616,7 +1616,7 @@ md_mcore_end (void)
 
 /* Various routines to kill one day.  */
 
-char *
+const char *
 md_atof (int type, char * litP, int * sizeP)
 {
   return ieee_md_atof (type, litP, sizeP, target_big_endian);
diff --git a/gas/config/tc-mep.c b/gas/config/tc-mep.c
index 6b659d4..6e62ad5 100644
--- a/gas/config/tc-mep.c
+++ b/gas/config/tc-mep.c
@@ -2039,7 +2039,7 @@ md_number_to_chars (char *buf, valueT val, int n)
     number_to_chars_littleendian (buf, val, n);
 }
 
-char *
+const char *
 md_atof (int type, char *litP, int *sizeP)
 {
   return ieee_md_atof (type, litP, sizeP, TRUE);
@@ -2080,7 +2080,7 @@ mep_fix_adjustable (fixS *fixP)
 }
 
 bfd_vma
-mep_elf_section_letter (int letter, char **ptrmsg)
+mep_elf_section_letter (int letter, const char **ptrmsg)
 {
   if (letter == 'v')
     return SHF_MEP_VLIW;
diff --git a/gas/config/tc-mep.h b/gas/config/tc-mep.h
index c771c21..b711889 100644
--- a/gas/config/tc-mep.h
+++ b/gas/config/tc-mep.h
@@ -106,7 +106,7 @@ extern int mep_unrecognized_line (int);
 extern void mep_cleanup (void);
 
 #define md_elf_section_letter		mep_elf_section_letter
-extern bfd_vma mep_elf_section_letter (int, char **);
+extern bfd_vma mep_elf_section_letter (int, const char **);
 #define md_elf_section_flags		mep_elf_section_flags
 extern flagword mep_elf_section_flags  (flagword, bfd_vma, int);
 
diff --git a/gas/config/tc-metag.c b/gas/config/tc-metag.c
index d287387..cc9140b 100644
--- a/gas/config/tc-metag.c
+++ b/gas/config/tc-metag.c
@@ -6707,7 +6707,7 @@ md_number_to_chars (char * buf, valueT val, int n)
 /* Equal to MAX_PRECISION in atof-ieee.c */
 #define MAX_LITTLENUMS 6
 
-char *
+const char *
 md_atof (int type, char * litP, int * sizeP)
 {
   int              i;
diff --git a/gas/config/tc-microblaze.c b/gas/config/tc-microblaze.c
index a92e0eb..e720ee8 100644
--- a/gas/config/tc-microblaze.c
+++ b/gas/config/tc-microblaze.c
@@ -1758,7 +1758,7 @@ md_undefined_symbol (char * name ATTRIBUTE_UNUSED)
 /* Turn a string in input_line_pointer into a floating point constant of type
    type, and store the appropriate bytes in *litP.  The number of LITTLENUMS
    emitted is stored in *sizeP.  An error message is returned, or NULL on OK.*/
-char *
+const char *
 md_atof (int type, char * litP, int * sizeP)
 {
   int prec;
diff --git a/gas/config/tc-microblaze.h b/gas/config/tc-microblaze.h
index 0fde831..f298a2a 100644
--- a/gas/config/tc-microblaze.h
+++ b/gas/config/tc-microblaze.h
@@ -100,7 +100,6 @@ extern const struct relax_type md_relax_table[];
 extern void      md_begin            (void);
 extern void      md_assemble         (char *);
 extern symbolS * md_undefined_symbol (char *);
-extern char *    md_atof             (int, char *, int *);
 extern void      md_show_usage       (FILE *);
 extern void      md_convert_frag               (bfd *, segT, fragS *);
 extern void      md_operand                    (expressionS *);
diff --git a/gas/config/tc-mips.c b/gas/config/tc-mips.c
index f2b81f2..ca1098b 100644
--- a/gas/config/tc-mips.c
+++ b/gas/config/tc-mips.c
@@ -3042,7 +3042,8 @@ mips_parse_base_start (char *s)
 static char *
 mips_parse_argument_token (char *s, char float_format)
 {
-  char *end, *save_in, *err;
+  char *end, *save_in;
+  const char *err;
   unsigned int regno1, regno2, channels;
   struct mips_operand_token token;
 
@@ -13996,7 +13997,7 @@ my_getExpression (expressionS *ep, char *str)
   input_line_pointer = save_in;
 }
 
-char *
+const char *
 md_atof (int type, char *litP, int *sizeP)
 {
   return ieee_md_atof (type, litP, sizeP, target_big_endian);
diff --git a/gas/config/tc-mmix.c b/gas/config/tc-mmix.c
index 00543f4..2400a0b 100644
--- a/gas/config/tc-mmix.c
+++ b/gas/config/tc-mmix.c
@@ -2272,7 +2272,7 @@ md_estimate_size_before_relax (fragS *fragP, segT segment)
    emitted is stored in *sizeP .  An error message is returned, or NULL on
    OK.  */
 
-char *
+const char *
 md_atof (int type, char *litP, int *sizeP)
 {
   if (type == 'r')
diff --git a/gas/config/tc-mn10200.c b/gas/config/tc-mn10200.c
index ea2fa8f..2cdfa68 100644
--- a/gas/config/tc-mn10200.c
+++ b/gas/config/tc-mn10200.c
@@ -314,7 +314,7 @@ md_undefined_symbol (char *name ATTRIBUTE_UNUSED)
   return 0;
 }
 
-char *
+const char *
 md_atof (int type, char *litp, int *sizep)
 {
   return ieee_md_atof (type, litp, sizep, FALSE);
diff --git a/gas/config/tc-mn10300.c b/gas/config/tc-mn10300.c
index 4f76677..9a5d3be 100644
--- a/gas/config/tc-mn10300.c
+++ b/gas/config/tc-mn10300.c
@@ -455,7 +455,7 @@ md_undefined_symbol (char *name ATTRIBUTE_UNUSED)
   return 0;
 }
 
-char *
+const char *
 md_atof (int type, char *litp, int *sizep)
 {
   return ieee_md_atof (type, litp, sizep, FALSE);
diff --git a/gas/config/tc-moxie.c b/gas/config/tc-moxie.c
index aa48c99..24c9aec 100644
--- a/gas/config/tc-moxie.c
+++ b/gas/config/tc-moxie.c
@@ -556,7 +556,7 @@ md_assemble (char *str)
    of LITTLENUMS emitted is stored in *SIZEP .  An error message is
    returned, or NULL on OK.  */
 
-char *
+const char *
 md_atof (int type, char *litP, int *sizeP)
 {
   int prec;
diff --git a/gas/config/tc-msp430.c b/gas/config/tc-msp430.c
index 98910aa..3621fdb 100644
--- a/gas/config/tc-msp430.c
+++ b/gas/config/tc-msp430.c
@@ -1630,7 +1630,7 @@ extract_cmd (char * from, char * to, int limit)
   return from;
 }
 
-char *
+const char *
 md_atof (int type, char * litP, int * sizeP)
 {
   return ieee_md_atof (type, litP, sizeP, FALSE);
diff --git a/gas/config/tc-mt.c b/gas/config/tc-mt.c
index c9aa18c..e0bca88 100644
--- a/gas/config/tc-mt.c
+++ b/gas/config/tc-mt.c
@@ -433,7 +433,7 @@ md_number_to_chars (char * buf, valueT val, int n)
   number_to_chars_bigendian (buf, val, n);
 }
 
-char *
+const char *
 md_atof (int type, char * litP, int * sizeP)
 {
   return ieee_md_atof (type, litP, sizeP, FALSE);
diff --git a/gas/config/tc-nds32.c b/gas/config/tc-nds32.c
index 0d7d346..897561d 100644
--- a/gas/config/tc-nds32.c
+++ b/gas/config/tc-nds32.c
@@ -6064,7 +6064,7 @@ md_number_to_chars (char *buf, valueT val, int n)
 /* This function is called to convert an ASCII string into a floating point
    value in format used by the CPU.  */
 
-char *
+const char *
 md_atof (int type, char *litP, int *sizeP)
 {
   int i;
diff --git a/gas/config/tc-nios2.c b/gas/config/tc-nios2.c
index 399fcf0..bf37ff7 100644
--- a/gas/config/tc-nios2.c
+++ b/gas/config/tc-nios2.c
@@ -264,7 +264,7 @@ md_number_to_chars (char *buf, valueT val, int n)
    of type TYPE, and store the appropriate bytes in *LITP.  The number
    of LITTLENUMS emitted is stored in *SIZEP.  An error message is
    returned, or NULL on OK.  */
-char *
+const char *
 md_atof (int type, char *litP, int *sizeP)
 {
   int prec;
@@ -3980,7 +3980,7 @@ nios2_cons_align (int size)
 /* Map 's' to SHF_NIOS2_GPREL.  */
 /* This is from the Alpha code tc-alpha.c.  */
 int
-nios2_elf_section_letter (int letter, char **ptr_msg)
+nios2_elf_section_letter (int letter, const char **ptr_msg)
 {
   if (letter == 's')
     return SHF_NIOS2_GPREL;
diff --git a/gas/config/tc-nios2.h b/gas/config/tc-nios2.h
index 05cc596..3612c33 100644
--- a/gas/config/tc-nios2.h
+++ b/gas/config/tc-nios2.h
@@ -92,7 +92,7 @@ extern long nios2_relax_frag (segT segment, fragS * fragP, long stretch);
 
 /* Processor-specific section directives.  */
 #define md_elf_section_letter		nios2_elf_section_letter
-extern int nios2_elf_section_letter (int, char **);
+extern int nios2_elf_section_letter (int, const char **);
 #define md_elf_section_flags		nios2_elf_section_flags
 extern flagword nios2_elf_section_flags (flagword, int, int);
 #endif
diff --git a/gas/config/tc-ns32k.c b/gas/config/tc-ns32k.c
index 1f5dbd9..0af829f 100644
--- a/gas/config/tc-ns32k.c
+++ b/gas/config/tc-ns32k.c
@@ -1916,7 +1916,7 @@ md_begin (void)
    LITTLENUMS emitted is stored in *SIZEP.  An error message is
    returned, or NULL on OK.  */
 
-char *
+const char *
 md_atof (int type, char *litP, int *sizeP)
 {
   return ieee_md_atof (type, litP, sizeP, FALSE);
diff --git a/gas/config/tc-or1k.c b/gas/config/tc-or1k.c
index 0abbd82..10fd2de 100644
--- a/gas/config/tc-or1k.c
+++ b/gas/config/tc-or1k.c
@@ -278,7 +278,7 @@ md_number_to_chars (char * buf, valueT val, int n)
 /* Equal to MAX_PRECISION in atof-ieee.c.  */
 #define MAX_LITTLENUMS 6
 
-char *
+const char *
 md_atof (int type, char * litP, int *  sizeP)
 {
   return ieee_md_atof (type, litP, sizeP, TRUE);
diff --git a/gas/config/tc-pdp11.c b/gas/config/tc-pdp11.c
index 68e710f..529df4f 100644
--- a/gas/config/tc-pdp11.c
+++ b/gas/config/tc-pdp11.c
@@ -30,7 +30,7 @@ extern int flonum_gen2vax (int, FLONUM_TYPE * f, LITTLENUM_TYPE *);
 /* A representation for PDP-11 machine code.  */
 struct pdp11_code
 {
-  char *error;
+  const char *error;
   int code;
   int additional;	/* Is there an additional word?  */
   int word;		/* Additional word, if any.  */
@@ -649,7 +649,7 @@ md_assemble (char *instruction_string)
   struct pdp11_code insn, op1, op2;
   int error;
   int size;
-  char *err = NULL;
+  const char *err = NULL;
   char *str;
   char *p;
   char c;
@@ -1442,7 +1442,7 @@ pseudo_even (int c ATTRIBUTE_UNUSED)
   record_alignment (now_seg, alignment);
 }
 
-char *
+const char *
 md_atof (int type, char * litP, int * sizeP)
 {
   return vax_md_atof (type, litP, sizeP);
diff --git a/gas/config/tc-pj.c b/gas/config/tc-pj.c
index 8f6266f..6a947fa 100644
--- a/gas/config/tc-pj.c
+++ b/gas/config/tc-pj.c
@@ -313,7 +313,7 @@ md_assemble (char *str)
     as_bad (_("Something forgot to clean up\n"));
 }
 
-char *
+const char *
 md_atof (int type, char *litP, int *sizeP)
 {
   return ieee_md_atof (type, litP, sizeP, target_big_endian);
diff --git a/gas/config/tc-ppc.c b/gas/config/tc-ppc.c
index 89c7bfe..cf4f96e 100644
--- a/gas/config/tc-ppc.c
+++ b/gas/config/tc-ppc.c
@@ -6069,7 +6069,7 @@ ppc_frob_section (asection *sec)
 
 #endif /* OBJ_XCOFF */
 
-char *
+const char *
 md_atof (int type, char *litp, int *sizep)
 {
   return ieee_md_atof (type, litp, sizep, target_big_endian);
diff --git a/gas/config/tc-rl78.c b/gas/config/tc-rl78.c
index d9f723a..0ecdb15 100644
--- a/gas/config/tc-rl78.c
+++ b/gas/config/tc-rl78.c
@@ -533,7 +533,7 @@ rl78_handle_align (fragS * frag)
     }
 }
 
-char *
+const char *
 md_atof (int type, char * litP, int * sizeP)
 {
   return ieee_md_atof (type, litP, sizeP, target_big_endian);
diff --git a/gas/config/tc-rx.c b/gas/config/tc-rx.c
index 22b5e9b..435d046 100644
--- a/gas/config/tc-rx.c
+++ b/gas/config/tc-rx.c
@@ -1338,7 +1338,7 @@ rx_handle_align (fragS * frag)
     }
 }
 
-char *
+const char *
 md_atof (int type, char * litP, int * sizeP)
 {
   return ieee_md_atof (type, litP, sizeP, target_big_endian);
diff --git a/gas/config/tc-s390.c b/gas/config/tc-s390.c
index 9bcc642..e2677f7 100644
--- a/gas/config/tc-s390.c
+++ b/gas/config/tc-s390.c
@@ -2034,7 +2034,7 @@ s390_machinemode (int ignore ATTRIBUTE_UNUSED)
 
 #undef MAX_HISTORY
 
-char *
+const char *
 md_atof (int type, char *litp, int *sizep)
 {
   return ieee_md_atof (type, litp, sizep, TRUE);
diff --git a/gas/config/tc-score.c b/gas/config/tc-score.c
index 536016f..8ea1084 100644
--- a/gas/config/tc-score.c
+++ b/gas/config/tc-score.c
@@ -61,7 +61,7 @@ static void s3_assemble (char *str);
 static void s3_operand (expressionS *);
 static void s3_begin (void);
 static void s3_number_to_chars (char *buf, valueT val, int n);
-static char *s3_atof (int type, char *litP, int *sizeP);
+static const char *s3_atof (int type, char *litP, int *sizeP);
 static void s3_frag_check (fragS * fragp ATTRIBUTE_UNUSED);
 static void s3_validate_fix (fixS *fixP);
 static int s3_force_relocation (struct fix *fixp);
@@ -6657,7 +6657,7 @@ s3_md_chars_to_number (char *buf, int n)
   return result;
 }
 
-static char *
+static const char *
 s3_atof (int type, char *litP, int *sizeP)
 {
   int prec;
@@ -7542,7 +7542,7 @@ md_number_to_chars (char *buf, valueT val, int n)
    within the words.  For example, (double) 1.1 in big endian mode is
    the byte sequence 3f f1 99 99 99 99 99 9a, and in little endian mode is
    the byte sequence 99 99 f1 3f 9a 99 99 99.  */
-char *
+const char *
 md_atof (int type, char *litP, int *sizeP)
 {
   if (score3)
diff --git a/gas/config/tc-sh.c b/gas/config/tc-sh.c
index ef07f10..3390a40 100644
--- a/gas/config/tc-sh.c
+++ b/gas/config/tc-sh.c
@@ -3089,7 +3089,7 @@ md_undefined_symbol (char *name ATTRIBUTE_UNUSED)
 
 /* Various routines to kill one day.  */
 
-char *
+const char *
 md_atof (int type, char *litP, int *sizeP)
 {
   return ieee_md_atof (type, litP, sizeP, target_big_endian);
diff --git a/gas/config/tc-sparc.c b/gas/config/tc-sparc.c
index 9f30d3a..9526583 100644
--- a/gas/config/tc-sparc.c
+++ b/gas/config/tc-sparc.c
@@ -200,7 +200,7 @@ const char FLT_CHARS[] = "rRsSfFdDxXpP";
 
 struct sparc_it
   {
-    char *error;
+    const char *error;
     unsigned long opcode;
     struct nlist *nlistp;
     expressionS exp;
@@ -3234,7 +3234,7 @@ output_insn (const struct sparc_opcode *insn, struct sparc_it *theinsn)
 #endif
 }
 
-char *
+const char *
 md_atof (int type, char *litP, int *sizeP)
 {
   return ieee_md_atof (type, litP, sizeP, target_big_endian);
diff --git a/gas/config/tc-spu.c b/gas/config/tc-spu.c
index b658bea..13e5e2d 100644
--- a/gas/config/tc-spu.c
+++ b/gas/config/tc-spu.c
@@ -716,7 +716,7 @@ get_imm (const char *param, struct spu_insn *insn, int arg)
   return param;
 }
 
-char *
+const char *
 md_atof (int type, char *litP, int *sizeP)
 {
   return ieee_md_atof (type, litP, sizeP, TRUE);
diff --git a/gas/config/tc-tic30.c b/gas/config/tc-tic30.c
index 4ccb820..71c6249 100644
--- a/gas/config/tc-tic30.c
+++ b/gas/config/tc-tic30.c
@@ -1218,7 +1218,7 @@ md_pcrel_from (fixS *fixP)
   return fixP->fx_where - fixP->fx_size + (INSN_SIZE * offset);
 }
 
-char *
+const char *
 md_atof (int what_statement_type,
 	 char *literalP,
 	 int *sizeP)
diff --git a/gas/config/tc-tic4x.c b/gas/config/tc-tic4x.c
index a833c52..c44201d 100644
--- a/gas/config/tc-tic4x.c
+++ b/gas/config/tc-tic4x.c
@@ -2547,7 +2547,7 @@ tic4x_cleanup (void)
    of chars emitted is stored in *sizeP.  An error message is
    returned, or NULL on OK.  */
 
-char *
+const char *
 md_atof (int type, char *litP, int *sizeP)
 {
   int prec;
diff --git a/gas/config/tc-tic54x.c b/gas/config/tc-tic54x.c
index 611b537..8c33df4 100644
--- a/gas/config/tc-tic54x.c
+++ b/gas/config/tc-tic54x.c
@@ -5062,7 +5062,7 @@ tic54x_parse_name (char *name ATTRIBUTE_UNUSED,
   return 0;
 }
 
-char *
+const char *
 md_atof (int type, char *literalP, int *sizeP)
 {
   /* Target data is little-endian, but floats are stored
diff --git a/gas/config/tc-tic6x.c b/gas/config/tc-tic6x.c
index 84fd368..2135dbf 100644
--- a/gas/config/tc-tic6x.c
+++ b/gas/config/tc-tic6x.c
@@ -4078,7 +4078,7 @@ md_apply_fix (fixS *fixP, valueT *valP, segT seg ATTRIBUTE_UNUSED)
 
 /* Convert a floating-point number to target (IEEE) format.  */
 
-char *
+const char *
 md_atof (int type, char *litP, int *sizeP)
 {
   return ieee_md_atof (type, litP, sizeP, target_big_endian);
diff --git a/gas/config/tc-tilegx.c b/gas/config/tc-tilegx.c
index 4cebfcf..bd42939 100644
--- a/gas/config/tc-tilegx.c
+++ b/gas/config/tc-tilegx.c
@@ -1330,7 +1330,7 @@ md_number_to_chars (char * buf, valueT val, int n)
    LITTLENUMS emitted is stored in *SIZEP.  An error message is
    returned, or NULL on OK.  */
 
-char *
+const char *
 md_atof (int type, char *litP, int *sizeP)
 {
   int prec;
diff --git a/gas/config/tc-tilepro.c b/gas/config/tc-tilepro.c
index 1f5890d..a11b05f 100644
--- a/gas/config/tc-tilepro.c
+++ b/gas/config/tc-tilepro.c
@@ -1205,7 +1205,7 @@ const pseudo_typeS md_pseudo_table[] =
    LITTLENUMS emitted is stored in *SIZEP.  An error message is
    returned, or NULL on OK.  */
 
-char *
+const char *
 md_atof (int type, char *litP, int *sizeP)
 {
   int prec;
diff --git a/gas/config/tc-v850.c b/gas/config/tc-v850.c
index bd762fb..5b425a9 100644
--- a/gas/config/tc-v850.c
+++ b/gas/config/tc-v850.c
@@ -1372,7 +1372,7 @@ skip_white_space (void)
    and so on upwards.  System registers are considered to be very
    high numbers.  */
 
-static char *
+static const char *
 parse_register_list (unsigned long *insn,
 		     const struct v850_operand *operand)
 {
@@ -1670,7 +1670,7 @@ md_undefined_symbol (char *name ATTRIBUTE_UNUSED)
   return 0;
 }
 
-char *
+const char *
 md_atof (int type, char *litp, int *sizep)
 {
   return ieee_md_atof (type, litp, sizep, FALSE);
diff --git a/gas/config/tc-vax.c b/gas/config/tc-vax.c
index 89fc6fc..538a994 100644
--- a/gas/config/tc-vax.c
+++ b/gas/config/tc-vax.c
@@ -3403,7 +3403,7 @@ vax_cons_fix_new (fragS *frag, int where, unsigned int nbytes, expressionS *exp,
   fix_new_exp (frag, where, (int) nbytes, exp, 0, r);
 }
 
-char *
+const char *
 md_atof (int type, char * litP, int * sizeP)
 {
   return vax_md_atof (type, litP, sizeP);
diff --git a/gas/config/tc-visium.c b/gas/config/tc-visium.c
index 4ab5fca..c618524 100644
--- a/gas/config/tc-visium.c
+++ b/gas/config/tc-visium.c
@@ -826,7 +826,7 @@ md_begin (void)
 /* Equal to MAX_PRECISION in atof-ieee.c.  */
 #define MAX_LITTLENUMS 6
 
-char *
+const char *
 md_atof (int type, char *litP, int *sizeP)
 {
   int i, prec;
diff --git a/gas/config/tc-xc16x.c b/gas/config/tc-xc16x.c
index 5e34e09..1fb964b 100644
--- a/gas/config/tc-xc16x.c
+++ b/gas/config/tc-xc16x.c
@@ -225,7 +225,7 @@ md_parse_option (int c ATTRIBUTE_UNUSED,
   return 0;
 }
 
-char *
+const char *
 md_atof (int type, char *litP, int *sizeP)
 {
   return ieee_md_atof (type, litP, sizeP, FALSE);
diff --git a/gas/config/tc-xgate.c b/gas/config/tc-xgate.c
index 5b94158..1d68edc 100644
--- a/gas/config/tc-xgate.c
+++ b/gas/config/tc-xgate.c
@@ -193,7 +193,7 @@ struct option md_longopts[] =
 
 size_t md_longopts_size = sizeof(md_longopts);
 
-char *
+const char *
 md_atof (int type, char *litP, int *sizeP)
 {
   return ieee_md_atof (type, litP, sizeP, TRUE);
diff --git a/gas/config/tc-xstormy16.c b/gas/config/tc-xstormy16.c
index 7ad3ea8..887160d 100644
--- a/gas/config/tc-xstormy16.c
+++ b/gas/config/tc-xstormy16.c
@@ -596,7 +596,7 @@ md_number_to_chars (char * buf, valueT val, int n)
   number_to_chars_littleendian (buf, val, n);
 }
 
-char *
+const char *
 md_atof (int type, char * litP, int * sizeP)
 {
   return ieee_md_atof (type, litP, sizeP, FALSE);
diff --git a/gas/config/tc-xtensa.c b/gas/config/tc-xtensa.c
index fe16659..c006418 100644
--- a/gas/config/tc-xtensa.c
+++ b/gas/config/tc-xtensa.c
@@ -6073,7 +6073,7 @@ md_apply_fix (fixS *fixP, valueT *valP, segT seg)
 }
 
 
-char *
+const char *
 md_atof (int type, char *litP, int *sizeP)
 {
   return ieee_md_atof (type, litP, sizeP, target_big_endian);
diff --git a/gas/config/tc-z80.c b/gas/config/tc-z80.c
index 2e1dca9..7b1e72a 100644
--- a/gas/config/tc-z80.c
+++ b/gas/config/tc-z80.c
@@ -384,7 +384,7 @@ md_undefined_symbol (char *name ATTRIBUTE_UNUSED)
   return NULL;
 }
 
-char *
+const char *
 md_atof (int type ATTRIBUTE_UNUSED, char *litP ATTRIBUTE_UNUSED,
 	 int *sizeP ATTRIBUTE_UNUSED)
 {
diff --git a/gas/config/tc-z8k.c b/gas/config/tc-z8k.c
index 64fca74..6a0d596 100644
--- a/gas/config/tc-z8k.c
+++ b/gas/config/tc-z8k.c
@@ -1285,7 +1285,7 @@ md_undefined_symbol (char *name ATTRIBUTE_UNUSED)
 
 /* Various routines to kill one day.  */
 
-char *
+const char *
 md_atof (int type, char *litP, int *sizeP)
 {
   return ieee_md_atof (type, litP, sizeP, TRUE);
diff --git a/gas/messages.c b/gas/messages.c
index dc016bf..ad40ca8 100644
--- a/gas/messages.c
+++ b/gas/messages.c
@@ -342,13 +342,13 @@ sprint_value (char *buf, valueT val)
 #define HEX_MIN_THRESHOLD	-(HEX_MAX_THRESHOLD)
 
 static void
-as_internal_value_out_of_range (const char *  prefix,
-				offsetT       val,
-				offsetT       min,
-				offsetT       max,
-				const char *        file,
-				unsigned      line,
-				int           bad)
+as_internal_value_out_of_range (const char *prefix,
+				offsetT val,
+				offsetT min,
+				offsetT max,
+				const char *file,
+				unsigned line,
+				int bad)
 {
   const char * err;
 
@@ -414,22 +414,22 @@ as_internal_value_out_of_range (const char *  prefix,
 }
 
 void
-as_warn_value_out_of_range (char *   prefix,
-			   offsetT  value,
-			   offsetT  min,
-			   offsetT  max,
-			   const char *   file,
+as_warn_value_out_of_range (const char *prefix,
+			   offsetT value,
+			   offsetT min,
+			   offsetT max,
+			   const char *file,
 			   unsigned line)
 {
   as_internal_value_out_of_range (prefix, value, min, max, file, line, 0);
 }
 
 void
-as_bad_value_out_of_range (char *   prefix,
-			   offsetT  value,
-			   offsetT  min,
-			   offsetT  max,
-			   const char *   file,
+as_bad_value_out_of_range (const char *prefix,
+			   offsetT value,
+			   offsetT min,
+			   offsetT max,
+			   const char *file,
 			   unsigned line)
 {
   as_internal_value_out_of_range (prefix, value, min, max, file, line, 1);
diff --git a/gas/read.c b/gas/read.c
index 45023ca..35d44c1 100644
--- a/gas/read.c
+++ b/gas/read.c
@@ -2136,7 +2136,7 @@ s_errwarn (int err)
      self-contained message, one that can be passed like the
      demand_copy_C_string return value, and with no assumption on the
      location of the name of the directive within the message.  */
-  char *msg
+  const char *msg
     = (err ? _(".error directive invoked in source file")
        : _(".warning directive invoked in source file"));
 
@@ -3541,7 +3541,7 @@ s_float_space (int float_type)
     }
   else
     {
-      char *err;
+      const char *err;
 
       err = md_atof (float_type, temp, &flen);
       know (flen <= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT);
@@ -4920,7 +4920,7 @@ float_cons (/* Clobbers input_line-pointer, checks end-of-line.  */
 {
   char *p;
   int length;			/* Number of chars in an object.  */
-  char *err;		/* Error from scanning floating literal.  */
+  const char *err;		/* Error from scanning floating literal.  */
   char temp[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT];
 
   if (is_it_end_of_statement ())
diff --git a/gas/tc.h b/gas/tc.h
index 3683466..51ff499 100644
--- a/gas/tc.h
+++ b/gas/tc.h
@@ -24,7 +24,7 @@
 
 extern const pseudo_typeS md_pseudo_table[];
 
-char * md_atof (int, char *, int *);
+const char * md_atof (int, char *, int *);
 int    md_parse_option (int, const char *);
 void   md_show_usage (FILE *);
 void   md_assemble (char *);