Fix declaration of shared global variables async_*

In a header file write it with extern keyword. And in one of the *.c
file declare it without extern keyword.

diff --git a/sysdep/unix/io.c b/sysdep/unix/io.c
index 4db6abb7be48f192046b206ce69fa59ddf678427..684ea132914b262da88bf05b58ccf1dfb9152b8f 100644 (file)
--- a/sysdep/unix/io.c
+++ b/sysdep/unix/io.c
@@ -2028,6 +2028,7 @@ watchdog_stop(void)
 
 volatile int async_config_flag;                /* Asynchronous reconfiguration/dump scheduled */
 volatile int async_dump_flag;
+volatile int async_shutdown_flag;
 
 void
 io_init(void)