* doc/observer.texi (executable_changed): New observer.

        * symtab.c: Include "observer.h".
        (find_main_name): New function.
        (main_name): If name_of_main is unset, then compute it
        using find_main_name.
        (symtab_observer_executable_changed): New function.
        (_initialize_symtab): Attach executable_changed observer.
        * exec.c: Include "observer.h".
        (exec_file_attach): Emit executable_changed notification.
        * symfile.c: Include "observer.h".
        (reread_symbols): Send an executable_changed if appropriate.
        * Makefile.in (exec.o): Add dependency on observer.h.
        (symfile.o): Likewise.
        (symtab.o): Likewise.

1 files changed, 8 insertions, 1 deletions

diff --git a/gdb/symfile.c b/gdb/symfile.c
index 6bf9413..1dbc2b2 100644
--- a/gdb/symfile.c
+++ b/gdb/symfile.c
@@ -48,6 +48,7 @@
 #include "readline/readline.h"
 #include "gdb_assert.h"
 #include "block.h"
+#include "observer.h"
 
 #include <sys/types.h>
 #include <fcntl.h>
@@ -2013,7 +2014,13 @@ reread_symbols (void)
     }
 
   if (reread_one)
-    clear_symtab_users ();
+    {
+      clear_symtab_users ();
+      /* At least one objfile has changed, so we can consider that
+         the executable we're debugging has changed too.  */
+      observer_notify_executable_changed (NULL);
+    }
+      
 }