$NetBSD: patch-contrib_mod__load_mod__load.h.in,v 1.2 2021/10/16 19:46:42 tm Exp $

Solaris and derivates has loadavg in sys/loadavg.h

--- contrib/mod_load/mod_load.h.in.orig	2019-12-09 18:10:43.656037132 +0000
+++ contrib/mod_load/mod_load.h.in
@@ -51,6 +51,9 @@
 /* Define if you have the <stdlib.h> header file. */
 #undef HAVE_STDLIB_H
 
+/* Define if you have the <sys/loadavg.h> header file. */
+#undef HAVE_SYS_LOADAVG_H
+
 /* Define if you have the <unistd.h> header file.  */
 #undef HAVE_UNISTD_H