refactor usage of compressed_debug_section_type

bfd/ChangeLog:

	* bfd-in.h (bfd_hash_set_default_size): Add COMPRESS_UNKNOWN
	  enum value.
	(struct compressed_type_tuple): New.
	* bfd-in2.h (bfd_hash_set_default_size): Regenerate.
	(struct compressed_type_tuple): Likewise.
	* libbfd.c (ARRAY_SIZE): New macro.
	(bfd_get_compression_algorithm): New function.
	(bfd_get_compression_algorithm_name): Likewise.

gas/ChangeLog:

	* as.c: Do not special-case, use the new functions.

ld/ChangeLog:

	* emultempl/elf.em: Do not special-case, use the new functions.
	* lexsup.c (elf_static_list_options): Likewise.

1 files changed, 9 insertions, 25 deletions

diff --git a/gas/as.c b/gas/as.c
index 9ce3d62..a5c2d24 100644
--- a/gas/as.c
+++ b/gas/as.c
@@ -250,21 +250,16 @@ Options:\n\
 
   fprintf (stream, _("\
   --alternate             initially turn on alternate macro syntax\n"));
-#ifdef DEFAULT_FLAG_COMPRESS_DEBUG
   fprintf (stream, _("\
   --compress-debug-sections[={none|zlib|zlib-gnu|zlib-gabi|zstd}]\n\
-                          compress DWARF debug sections using zlib [default]\n"));
+                          compress DWARF debug sections\n")),
   fprintf (stream, _("\
-  --nocompress-debug-sections\n\
-                          don't compress DWARF debug sections\n"));
-#else
-  fprintf (stream, _("\
-  --compress-debug-sections[={none|zlib|zlib-gnu|zlib-gabi|zstd}]\n\
-                          compress DWARF debug sections using zlib\n"));
+		            Default: %s\n"),
+	   bfd_get_compression_algorithm_name (flag_compress_debug));
+
   fprintf (stream, _("\
   --nocompress-debug-sections\n\
-                          don't compress DWARF debug sections [default]\n"));
-#endif
+                          don't compress DWARF debug sections\n"));
   fprintf (stream, _("\
   -D                      produce assembler debugging messages\n"));
   fprintf (stream, _("\
@@ -741,24 +736,13 @@ This program has absolutely no warranty.\n"));
 	  if (optarg)
 	    {
 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
-	      if (strcasecmp (optarg, "none") == 0)
-		flag_compress_debug = COMPRESS_DEBUG_NONE;
-	      else if (strcasecmp (optarg, "zlib") == 0)
-		flag_compress_debug = COMPRESS_DEBUG_GABI_ZLIB;
-	      else if (strcasecmp (optarg, "zlib-gnu") == 0)
-		flag_compress_debug = COMPRESS_DEBUG_GNU_ZLIB;
-	      else if (strcasecmp (optarg, "zlib-gabi") == 0)
-		flag_compress_debug = COMPRESS_DEBUG_GABI_ZLIB;
-	      else if (strcasecmp (optarg, "zstd") == 0)
-		{
-#ifdef HAVE_ZSTD
-		  flag_compress_debug = COMPRESS_DEBUG_ZSTD;
-#else
+	      flag_compress_debug = bfd_get_compression_algorithm (optarg);
+#ifndef HAVE_ZSTD
+	      if (flag_compress_debug == COMPRESS_DEBUG_ZSTD)
 		  as_fatal (_ ("--compress-debug-sections=zstd: gas is not "
 			       "built with zstd support"));
 #endif
-		}
-	      else
+	      if (flag_compress_debug == COMPRESS_UNKNOWN)
 		as_fatal (_("Invalid --compress-debug-sections option: `%s'"),
 			  optarg);
 #else