xl: lift common_domname declaration to xl.h

No functional change.

Signed-off-by: Wei Liu <wei.liu2@citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>

tools/xl/xl.h

@@ -210,6 +210,7 @@ int main_qemu_monitor_command(int argc, char **argv);
 
 void help(const char *command);
 
+extern const char *common_domname;
 extern struct cmd_spec cmd_table[];
 extern int cmdtable_len;
 /* Look up a command in the table, allowing unambiguous truncation */

tools/xl/xl_migrate.c

@@ -30,8 +30,6 @@
 #include "xl_utils.h"
 #include "xl_parse.h"
 
-extern const char *common_domname;
-
 #ifndef LIBXL_HAVE_NO_SUSPEND_RESUME
 
 static pid_t create_migration_child(const char *rune, int *send_fd,

tools/xl/xl_misc.c

@@ -23,8 +23,6 @@
 #include "xl_utils.h"
 #include "xl_parse.h"
 
-extern const char *common_domname;
-
 static void button_press(uint32_t domid, const char *b)
 {
     libxl_trigger trigger;

tools/xl/xl_utils.c

@@ -28,7 +28,6 @@
 #include "xl_utils.h"
 
 extern int logfile;
-extern const char *common_domname;
 
 void dolog(const char *file, int line, const char *func, char *fmt, ...)
 {

tools/xl/xl_vmcontrol.c

@@ -31,7 +31,6 @@
 #include "xl_parse.h"
 
 extern int logfile;
-extern const char *common_domname;
 
 static int fd_lock = -1;