[PATCH 1/1] gas: add new command line option --no-group-check

[PATCH 1/1] gas: add new command line option --no-group-check

[Tan Yuan]

This option suppresses the warning when attaching a group to a section
that already belongs to a group.

ChangeLog:

	* gas/as.c (parse_args): Parse args and set flag_no_group_check.
	* gas/as.h: Introduce skeleton for --no-group-check.
	* gas/doc/as.texi: document --no-group-check.
    * gas/config/obj-elf.c: Add conditional check for conflicting group
	name

Signed-off-by: Tan Yuan <tanyuan@tinylab.org>
---
 gas/as.c             | 10 +++++++++-
 gas/as.h             |  3 +++
 gas/config/obj-elf.c |  2 +-
 gas/doc/as.texi      |  4 ++++
 4 files changed, 17 insertions(+), 2 deletions(-)

diff --git a/gas/as.c b/gas/as.c
index 6839c841588..2a5cb98212d 100644
--- a/gas/as.c
+++ b/gas/as.c
@@ -383,6 +383,8 @@ Options:\n\
   fprintf (stream, _("\
   -W  --no-warn           suppress warnings\n"));
   fprintf (stream, _("\
+  --no-group-check        suppress the warning when attaching a group to a section that already has a group.\n"));  
+  fprintf (stream, _("\
   --warn                  don't suppress warnings\n"));
   fprintf (stream, _("\
   --fatal-warnings        treat warnings as errors\n"));
@@ -511,7 +513,8 @@ parse_args (int * pargc, char *** pargv)
       OPTION_NOCOMPRESS_DEBUG,
       OPTION_NO_PAD_SECTIONS,
       OPTION_MULTIBYTE_HANDLING,  /* = STD_BASE + 40 */
-      OPTION_SFRAME
+      OPTION_SFRAME,
+      OPTION_NO_GROUP_CHECK
     /* When you add options here, check that they do
        not collide with OPTION_MD_BASE.  See as.h.  */
     };
@@ -585,6 +588,7 @@ parse_args (int * pargc, char *** pargv)
     ,{"nocpp", no_argument, NULL, OPTION_NOCPP}
     ,{"no-pad-sections", no_argument, NULL, OPTION_NO_PAD_SECTIONS}
     ,{"no-warn", no_argument, NULL, 'W'}
+    ,{"no-group-check", no_argument, NULL, OPTION_NO_GROUP_CHECK}
     ,{"reduce-memory-overheads", no_argument, NULL, OPTION_REDUCE_MEMORY_OVERHEADS}
     ,{"statistics", no_argument, NULL, OPTION_STATISTICS}
     ,{"strip-local-absolute", no_argument, NULL, OPTION_STRIP_LOCAL_ABSOLUTE}
@@ -990,6 +994,10 @@ This program has absolutely no warranty.\n"));
 	  else
 	    as_fatal (_("Invalid --size-check= option: `%s'"), optarg);
 	  break;
+  
+  case OPTION_NO_GROUP_CHECK:
+    flag_no_group_check = 1;
+    break;
 
 	case OPTION_ELF_STT_COMMON:
 	  if (strcasecmp (optarg, "no") == 0)
diff --git a/gas/as.h b/gas/as.h
index 99ffe77afd2..92db749e193 100644
--- a/gas/as.h
+++ b/gas/as.h
@@ -605,6 +605,9 @@ COMMON const char *        found_comment_file;
 /* If .size directive failure should be error or warning.  */
 COMMON int flag_allow_nonconst_size;
 
+/* True if the check for an existing group of sections should be inhibited.   */
+COMMON int flag_no_group_check;
+
 /* If we should generate ELF common symbols with the STT_COMMON type.  */
 extern int flag_use_elf_stt_common;
 
diff --git a/gas/config/obj-elf.c b/gas/config/obj-elf.c
index 753a929fb14..8b383a8e93d 100644
--- a/gas/config/obj-elf.c
+++ b/gas/config/obj-elf.c
@@ -1086,7 +1086,7 @@ obj_elf_attach_to_group (int dummy ATTRIBUTE_UNUSED)
       return;
     }
 
-  if (elf_group_name (now_seg))
+  if (elf_group_name (now_seg) && !flag_no_group_check)
     {
       as_warn (_("section %s already has a group (%s)"),
 	       bfd_section_name (now_seg), elf_group_name (now_seg));
diff --git a/gas/doc/as.texi b/gas/doc/as.texi
index 4959c2f6d49..fb27395607e 100644
--- a/gas/doc/as.texi
+++ b/gas/doc/as.texi
@@ -961,6 +961,10 @@ Print the @command{as} version and exit.
 @itemx --no-warn
 Suppress warning messages.
 
+@item --no-group-check
+Suppress the warning when attaching a group to a section that already has a
+group.
+
 @item --fatal-warnings
 Treat warnings as errors.
 
-- 
2.41.0