Give a type and a name to a function parameter that will continue to be ignored
As NULL is passed as an argument to pthread_create's callback in only place where timerloop
is used, this invention of a name due to C23 does nothing and argument is never used.
https://bugs.gentoo.org/944365
--- a/lowlevel.c
+++ b/lowlevel.c
@@ -44,7 +44,7 @@
 static int timerpipe[2];
 static int quitpipe[2];
 
-static void *timerloop()
+static void *timerloop(void * nothing)
 {
     int n;
     int status;