Bug: https://bugs.gentoo.org/882321
--- a/buttons.c
+++ b/buttons.c
@@ -10,6 +10,7 @@
  * $Id: mpg123ctl.c,v 1.12 1999/10/08 06:21:41 pcrosby Exp $
  */
 
+#include "wmgeneral.h"
 #include "buttons.h"
 
 struct coord {
--- a/main.c
+++ b/main.c
@@ -11,6 +11,7 @@
  * $Id: main.c,v 1.11 1999/10/08 22:21:32 pcrosby Exp $
  */
 
+#include <ctype.h>
 #include "main.h"
 
 #define B_STOP 0
--- a/mpg123ctl.c
+++ b/mpg123ctl.c
@@ -14,6 +14,8 @@
  * $Id: mpg123ctl.c,v 1.15 1999/10/12 04:41:20 pcrosby Exp $
  */
 
+#include <time.h>
+#include <ctype.h>
 #include "mpg123ctl.h"
 
 #define MAXDIRS 100
--- a/song_hash.c
+++ b/song_hash.c
@@ -1,3 +1,5 @@
+#include <stdlib.h>
+#include <string.h>
 #include "song_hash.h"
 
 #define HASH_TABLE_SIZE 11