Make unlink_objfile and put_objfile_before static

I noticed an obsolete comment just before unlink_objfile, and then I
noticed that both unlink_objfile and put_objfile_before could be
static.  This patch makes these changes, and also moves unlink_objfile
earlier, so that a forward declaration is not needed.

Tested by rebuilding.

gdb/ChangeLog
2019-10-20  Tom Tromey  <tom@tromey.com>

	* objfiles.h (unlink_objfile, put_objfile_before): Don't declare.
	* objfiles.c (unlink_objfile): Move earlier.  Now static.  Remove
	obsolete comment.
	(put_objfile_before): Now static.

Change-Id: I1b5927a60fd1cc59bfc9c6761f61652a01ef13e0

3 files changed, 29 insertions, 37 deletions

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 7c737ac..67de848 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,10 @@
+2019-10-20  Tom Tromey  <tom@tromey.com>
+
+	* objfiles.h (unlink_objfile, put_objfile_before): Don't declare.
+	* objfiles.c (unlink_objfile): Move earlier.  Now static.  Remove
+	obsolete comment.
+	(put_objfile_before): Now static.
+
 2019-10-19  Simon Marchi  <simon.marchi@polymtl.ca>
 
 	* gdbsupport/common-utils.h (startswith): Change return type to
diff --git a/gdb/objfiles.c b/gdb/objfiles.c
index f1e708d..fd1cbf7 100644
--- a/gdb/objfiles.c
+++ b/gdb/objfiles.c
@@ -473,10 +473,31 @@ separate_debug_iterator::operator++ ()
   return *this;
 }
 
+/* Unlink OBJFILE from the list of known objfiles.  */
+
+static void
+unlink_objfile (struct objfile *objfile)
+{
+  struct objfile **objpp;
+
+  for (objpp = &object_files; *objpp != NULL; objpp = &((*objpp)->next))
+    {
+      if (*objpp == objfile)
+	{
+	  *objpp = (*objpp)->next;
+	  objfile->next = NULL;
+	  return;
+	}
+    }
+
+  internal_error (__FILE__, __LINE__,
+		  _("unlink_objfile: objfile already unlinked"));
+}
+
 /* Put one object file before a specified on in the global list.
    This can be used to make sure an object file is destroyed before
    another when using objfiles_safe to free all objfiles.  */
-void
+static void
 put_objfile_before (struct objfile *objfile, struct objfile *before_this)
 {
   struct objfile **objp;
@@ -497,38 +518,6 @@ put_objfile_before (struct objfile *objfile, struct objfile *before_this)
 		  _("put_objfile_before: before objfile not in list"));
 }
 
-/* Unlink OBJFILE from the list of known objfiles, if it is found in the
-   list.
-
-   It is not a bug, or error, to call this function if OBJFILE is not known
-   to be in the current list.  This is done in the case of mapped objfiles,
-   for example, just to ensure that the mapped objfile doesn't appear twice
-   in the list.  Since the list is threaded, linking in a mapped objfile
-   twice would create a circular list.
-
-   If OBJFILE turns out to be in the list, we zap it's NEXT pointer after
-   unlinking it, just to ensure that we have completely severed any linkages
-   between the OBJFILE and the list.  */
-
-void
-unlink_objfile (struct objfile *objfile)
-{
-  struct objfile **objpp;
-
-  for (objpp = &object_files; *objpp != NULL; objpp = &((*objpp)->next))
-    {
-      if (*objpp == objfile)
-	{
-	  *objpp = (*objpp)->next;
-	  objfile->next = NULL;
-	  return;
-	}
-    }
-
-  internal_error (__FILE__, __LINE__,
-		  _("unlink_objfile: objfile already unlinked"));
-}
-
 /* Add OBJFILE as a separate debug objfile of PARENT.  */
 
 void
diff --git a/gdb/objfiles.h b/gdb/objfiles.h
index 2d921208..aa8e320 100644
--- a/gdb/objfiles.h
+++ b/gdb/objfiles.h
@@ -637,12 +637,8 @@ extern CORE_ADDR entry_point_address (void);
 
 extern void build_objfile_section_table (struct objfile *);
 
-extern void put_objfile_before (struct objfile *, struct objfile *);
-
 extern void add_separate_debug_objfile (struct objfile *, struct objfile *);
 
-extern void unlink_objfile (struct objfile *);
-
 extern void free_objfile_separate_debug (struct objfile *);
 
 extern void free_all_objfiles (void);