https://bugs.gentoo.org/852566
--- a/libraries/portmidi/pm_linux/finddefault.c
+++ b/libraries/portmidi/pm_linux/finddefault.c
@@ -2,6 +2,7 @@
    Roger Dannenberg, Jan 2009
 */
 
+#include <ctype.h>
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
--- a/master/main.cpp
+++ b/master/main.cpp
@@ -29,6 +29,7 @@
 #include <iostream>
 #endif
 
+#include <ctime>
 #include <string>
 #include <vector>
 #include <list>