gdb: move annotation_level declaration/definition to annotate.{h,c}

The declaration of annotation_level is currently in defs.h, while the
definition is in stack.c.  I don't really understand why that variable
would live in stack.c, it seems completely unrelated.  Move it to
annotate.c, and move the declaration to annotate.h.

Change-Id: I6cf8e9bd20e83959bdf5ad58dd008b6e1187d7d8
Approved-By: Tom Tromey <tom@tromey.com>

gdb/annotate.c

@@ -29,6 +29,10 @@
 #include "source-cache.h"
 #include "ui.h"
 
+/* See annotate.h.  */
+
+int annotation_level = 0;
+
 /* Prototypes for local functions.  */
 
 static void print_value_flags (struct type *);

gdb/annotate.h

@@ -22,6 +22,14 @@
 #include "symtab.h"
 #include "gdbtypes.h"
 
+/* Zero means do things normally; we are interacting directly with the
+   user.  One means print the full filename and linenumber when a
+   frame is printed, and do so in a format emacs18/emacs19.22 can
+   parse.  Two means print similar annotations, but in many more
+   cases and in a slightly different syntax.  */
+
+extern int annotation_level;
+
 extern void annotate_breakpoint (int);
 extern void annotate_catchpoint (int);
 extern void annotate_watchpoint (int);

gdb/defs.h

@@ -195,12 +195,6 @@ struct value;
    globals that are currently only available to main.c.  */
 extern std::string relocate_gdb_directory (const char *initial, bool relocatable);
 
-
-/* Annotation stuff.  */
-
-extern int annotation_level;	/* in stack.c */
-
-
 /* From symfile.c */
 
 extern void symbol_file_command (const char *, int);

gdb/main.c

@@ -17,6 +17,7 @@
    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
+#include "annotate.h"
 #include "top.h"
 #include "ui.h"
 #include "target.h"

gdb/stack.c

@@ -230,14 +230,6 @@ static void print_frame (struct ui_out *uiout,
 static frame_info_ptr find_frame_for_function (const char *);
 static frame_info_ptr find_frame_for_address (CORE_ADDR);
 
-/* Zero means do things normally; we are interacting directly with the
-   user.  One means print the full filename and linenumber when a
-   frame is printed, and do so in a format emacs18/emacs19.22 can
-   parse.  Two means print similar annotations, but in many more
-   cases and in a slightly different syntax.  */
-
-int annotation_level = 0;
-
 /* Class used to manage tracking the last symtab we displayed.  */
 
 class last_displayed_symtab_info_type