make md_parse_option () take a const char *

This is mostly just adding const in many places, however there are a couple
interesting things.  We need to add casts in tc-s390.c and tc-cris.c because
they have functions that assign to input_line_pointer an argument that
sometimes comes from md_parse_option.  Presumably this is safe because those
targets never pass literals to md_parse_option (), but this code should
probably be improved in the future.  Also xtensa passes the argument to strtoll
which is a rather odd function, it takes a const char * as argument and returns
a pointer into that string as a char * through an out argument, but we can work
around that by adding more variables.

gas/ChangeLog:

2016-03-29  Trevor Saunders  <tbsaunde+binutils@tbsaunde.org>

	* config/tc-aarch64.c (struct aarch64_long_option_table): Ad const
	qualifier.
	* config/tc-alpha.c (md_parse_option): Likewise.
	* config/tc-arc.c (md_parse_option): Likewise.
	* config/tc-arm.c (struct arm_long_option_table): Likewise.
	(md_parse_option): Likewise.
	* config/tc-avr.c (md_parse_option): Likewise.
	* config/tc-bfin.c (md_parse_option): Likewise.
	* config/tc-cr16.c (md_parse_option): Likewise.
	* config/tc-cris.c (s_cris_arch): Likewise.
	(md_parse_option): Likewise.
	* config/tc-crx.c (md_parse_option): Likewise.
	* config/tc-d10v.c (md_parse_option): Likewise.
	* config/tc-d30v.c (md_parse_option): Likewise.
	* config/tc-dlx.c (md_parse_option): Likewise.
	* config/tc-epiphany.c (md_parse_option): Likewise.
	* config/tc-fr30.c (md_parse_option): Likewise.
	* config/tc-frv.c (md_parse_option): Likewise.
	* config/tc-ft32.c (md_parse_option): Likewise.
	* config/tc-h8300.c (md_parse_option): Likewise.
	* config/tc-hppa.c (md_parse_option): Likewise.
	* config/tc-i370.c (md_parse_option): Likewise.
	* config/tc-i386.c (md_parse_option): Likewise.
	* config/tc-i860.c (md_parse_option): Likewise.
	* config/tc-i960.c (md_parse_option): Likewise.
	* config/tc-ia64.c (md_parse_option): Likewise.
	* config/tc-ip2k.c (md_parse_option): Likewise.
	* config/tc-iq2000.c (md_parse_option): Likewise.
	* config/tc-lm32.c (md_parse_option): Likewise.
	* config/tc-m32c.c (md_parse_option): Likewise.
	* config/tc-m32r.c (md_parse_option): Likewise.
	* config/tc-m68hc11.c (md_parse_option): Likewise.
	* config/tc-m68k.c (md_parse_option): Likewise.
	* config/tc-mcore.c (md_parse_option): Likewise.
	* config/tc-mep.c (md_parse_option): Likewise.
	* config/tc-metag.c (struct metag_long_option): Likewise.
	(md_parse_option): Likewise.
	* config/tc-microblaze.c (md_parse_option): Likewise.
	* config/tc-microblaze.h (md_parse_option): Remove prototype.
	* config/tc-mips.c (md_parse_option): Adjust.
	* config/tc-mmix.c (md_parse_option): Likewise.
	* config/tc-mn10200.c (md_parse_option): Likewise.
	* config/tc-mn10300.c (md_parse_option): Likewise.
	* config/tc-moxie.c (md_parse_option): Likewise.
	* config/tc-msp430.c (md_parse_option): Likewise.
	* config/tc-mt.c (md_parse_option): Likewise.
		* config/tc-nds32.c (md_parse_option): Likewise.
		* config/tc-nds32.h (nds32_parse_option): Likewise.
	* config/tc-nios2.c (md_parse_option): Likewise.
	* config/tc-ns32k.c (md_parse_option): Likewise.
	* config/tc-or1k.c (md_parse_option): Likewise.
	* config/tc-pdp11.c (md_parse_option): Likewise.
	* config/tc-pj.c (md_parse_option): Likewise.
	* config/tc-ppc.c (md_parse_option): Likewise.
	* config/tc-rl78.c (md_parse_option): Likewise.
	* config/tc-rx.c (md_parse_option): Likewise.
	* config/tc-s390.c (s390_parse_cpu): Likewise.
	* config/tc-score.c (md_parse_option): Likewise.
	* config/tc-sh.c (md_parse_option): Likewise.
	* config/tc-sparc.c (md_parse_option): Likewise.
	* config/tc-spu.c (md_parse_option): Likewise.
	* config/tc-tic30.c (md_parse_option): Likewise.
	* config/tc-tic4x.c (md_parse_option): Likewise.
	* config/tc-tic54x.c (md_parse_option): Likewise.
	* config/tc-tic6x.c (md_parse_option): Likewise.
	* config/tc-tilegx.c (md_parse_option): Likewise.
	* config/tc-tilepro.c (md_parse_option): Likewise.
	* config/tc-v850.c (md_parse_option): Likewise.
	* config/tc-vax.c (md_parse_option): Likewise.
	* config/tc-visium.c (struct visium_long_option_table): Likewise.
	* config/tc-xc16x.c (md_parse_option): Likewise.
	* config/tc-xgate.c (md_parse_option): Likewise.
	* config/tc-xstormy16.c (md_parse_option): Likewise.
	* config/tc-xtensa.c (md_parse_option): Likewise.
	* config/tc-z80.c (md_parse_option): Likewise.
	* config/tc-z8k.c (md_parse_option): Likewise.
	* tc.h (md_parse_option): Likewise.

1 files changed, 9 insertions, 9 deletions

diff --git a/gas/config/tc-arm.c b/gas/config/tc-arm.c
index eb842d5..bec091c 100644
--- a/gas/config/tc-arm.c
+++ b/gas/config/tc-arm.c
@@ -25581,7 +25581,7 @@ struct arm_long_option_table
 {
   const char * option;		/* Substring to match.	*/
   const char * help;			/* Help information.  */
-  int (* func) (char * subopt);	/* Function to decode sub-option.  */
+  int (* func) (const char * subopt);	/* Function to decode sub-option.  */
   const char * deprecated;		/* If non-null, print this message.  */
 };
 
@@ -25709,7 +25709,7 @@ arm_parse_extension (const char *str, const arm_feature_set **opt_p)
 }
 
 static bfd_boolean
-arm_parse_cpu (char *str)
+arm_parse_cpu (const char *str)
 {
   const struct arm_cpu_option_table *opt;
   const char *ext = strchr (str, '+');
@@ -25759,7 +25759,7 @@ arm_parse_cpu (char *str)
 }
 
 static bfd_boolean
-arm_parse_arch (char *str)
+arm_parse_arch (const char *str)
 {
   const struct arm_arch_option_table *opt;
   const char *ext = strchr (str, '+');
@@ -25794,7 +25794,7 @@ arm_parse_arch (char *str)
 }
 
 static bfd_boolean
-arm_parse_fpu (char * str)
+arm_parse_fpu (const char * str)
 {
   const struct arm_option_fpu_value_table * opt;
 
@@ -25810,7 +25810,7 @@ arm_parse_fpu (char * str)
 }
 
 static bfd_boolean
-arm_parse_float_abi (char * str)
+arm_parse_float_abi (const char * str)
 {
   const struct arm_option_value_table * opt;
 
@@ -25827,7 +25827,7 @@ arm_parse_float_abi (char * str)
 
 #ifdef OBJ_ELF
 static bfd_boolean
-arm_parse_eabi (char * str)
+arm_parse_eabi (const char * str)
 {
   const struct arm_option_value_table *opt;
 
@@ -25843,7 +25843,7 @@ arm_parse_eabi (char * str)
 #endif
 
 static bfd_boolean
-arm_parse_it_mode (char * str)
+arm_parse_it_mode (const char * str)
 {
   bfd_boolean ret = TRUE;
 
@@ -25866,7 +25866,7 @@ arm_parse_it_mode (char * str)
 }
 
 static bfd_boolean
-arm_ccs_mode (char * unused ATTRIBUTE_UNUSED)
+arm_ccs_mode (const char * unused ATTRIBUTE_UNUSED)
 {
   codecomposer_syntax = TRUE;
   arm_comment_chars[0] = ';';
@@ -25896,7 +25896,7 @@ struct arm_long_option_table arm_long_opts[] =
 };
 
 int
-md_parse_option (int c, char * arg)
+md_parse_option (int c, const char * arg)
 {
   struct arm_option_table *opt;
   const struct arm_legacy_option_table *fopt;