https://bugs.gentoo.org/943783

--- a/xtris.c
+++ b/xtris.c
@@ -2731,7 +2731,7 @@ void connect2server(char *h) {
   }
 }
 
-void sigchld() {
+void sigchld(int a) {
 #ifdef NeXT
   while (wait3(NULL, WNOHANG|WUNTRACED, NULL) > 0);
 #else