-Og warning fixes

Found when building with gcc 4.9.4 using -Og.

bfd/
	* elf-eh-frame.c (offset_adjust): Avoid false positive gcc warning.
	* elflink.c (bfd_elf_size_dynsym_hash_dynstr): Likewise.
	* elfnn-aarch64.c (elfNN_aarch64_final_link_relocate): Likewise.
ld/
	* emultempl/msp430.em (eval_upper_either_sections): Make base_sec_name
	a const char*.
	(eval_lower_either_sections): Likewise.
	(msp430_elf_after_allocation): Likewise, and don't needlessly concat
	and free.  Warning fix.

2 files changed, 21 insertions, 13 deletions

diff --git a/ld/ChangeLog b/ld/ChangeLog
index b0029ea..4a45000 100644
--- a/ld/ChangeLog
+++ b/ld/ChangeLog
@@ -1,3 +1,11 @@
+2017-09-02  Alan Modra  <amodra@gmail.com>
+
+	* emultempl/msp430.em (eval_upper_either_sections): Make base_sec_name
+	a const char*.
+	(eval_lower_either_sections): Likewise.
+	(msp430_elf_after_allocation): Likewise, and don't needlessly concat
+	and free.  Warning fix.
+
 2017-09-01  H.J. Lu  <hongjiu.lu@intel.com>
 
 	PR ld/22061
diff --git a/ld/emultempl/msp430.em b/ld/emultempl/msp430.em
index f1bbc85..a956a2f 100644
--- a/ld/emultempl/msp430.em
+++ b/ld/emultempl/msp430.em
@@ -557,7 +557,7 @@ gld${EMULATION_NAME}_handle_option (int optc)
 static void
 eval_upper_either_sections (bfd *abfd, asection *s, void *data)
 {
-  char * base_sec_name;
+  const char * base_sec_name;
   const char * curr_name;
   char * either_name;
   int curr_region;
@@ -576,7 +576,7 @@ eval_upper_either_sections (bfd *abfd, asection *s, void *data)
   if (bfd_link_relocatable (&link_info))
     return;
 
-  base_sec_name = (char *) data;
+  base_sec_name = (const char *) data;
   curr_name = bfd_get_section_name (abfd, s);
 
   /* Only concerned with .either input sections in the upper output section.  */
@@ -639,7 +639,7 @@ eval_upper_either_sections (bfd *abfd, asection *s, void *data)
 static void
 eval_lower_either_sections (bfd *abfd, asection *s, void *data)
 {
-  char * base_sec_name;
+  const char * base_sec_name;
   const char * curr_name;
   char * either_name;
   int curr_region;
@@ -656,7 +656,7 @@ eval_lower_either_sections (bfd *abfd, asection *s, void *data)
   if (bfd_link_relocatable (&link_info))
     return;
 
-  base_sec_name = (char *) data;
+  base_sec_name = (const char *) data;
   curr_name = bfd_get_section_name (abfd, s);
 
   /* Only concerned with .either input sections in the lower or "default"
@@ -758,29 +758,30 @@ static void
 msp430_elf_after_allocation (void)
 {
   int relax_count = 0;
-  int i;
+  unsigned int i;
   /* Go over each section twice, once to place either sections that don't fit
      in lower into upper, and then again to move any sections in upper that
      fit in lower into lower.  */
   for (i = 0; i < 8; i++)
     {
       int placement_stage = (i < 4) ? LOWER_TO_UPPER : UPPER_TO_LOWER;
-      char * base_sec_name;
+      const char * base_sec_name;
       lang_output_section_statement_type * upper;
 
       switch (i % 4)
 	{
+	default:
 	case 0:
-	  base_sec_name = concat (".text", NULL);
+	  base_sec_name = ".text";
 	  break;
 	case 1:
-	  base_sec_name = concat (".data", NULL);
+	  base_sec_name = ".data";
 	  break;
 	case 2:
-	  base_sec_name = concat (".bss", NULL);
+	  base_sec_name = ".bss";
 	  break;
 	case 3:
-	  base_sec_name = concat (".rodata", NULL);
+	  base_sec_name = ".rodata";
 	  break;
 	}
       upper = lang_output_section_find (concat (".upper", base_sec_name, NULL));
@@ -806,7 +807,7 @@ msp430_elf_after_allocation (void)
 		   abfd = abfd->link.next)
 		{
 		  bfd_map_over_sections (abfd, eval_lower_either_sections,
-					 base_sec_name);
+					 (void *) base_sec_name);
 		}
 	    }
 	  else if (placement_stage == UPPER_TO_LOWER)
@@ -821,12 +822,11 @@ msp430_elf_after_allocation (void)
 		   abfd = abfd->link.next)
 		{
 		  bfd_map_over_sections (abfd, eval_upper_either_sections,
-					 base_sec_name);
+					 (void *) base_sec_name);
 		}
 	    }
 
 	}
-      free (base_sec_name);
     }
   gld${EMULATION_NAME}_after_allocation ();
 }