gentoo-overlay/sys-apps/isapnptools/files/isapnptools-1.27-include.patch

--- a/src/callbacks.c
+++ b/src/callbacks.c
@@ -51,6 +51,7 @@
 #include <stdio.h>
 #include <errno.h>
 #include <string.h>
+#include <stdlib.h> /* exit() */
 
 /****************************************************************************/