--- heirloom-ng-clean/chroot/chroot.c	2024-12-12 19:06:27.337195016 +0300
+++ heirloom-ng/chroot/chroot.c	2024-12-12 16:52:24.610354380 +0300
@@ -18,6 +18,7 @@
 #include <unistd.h>
 #define ROOTUID 0
 
+void usage(void);
 char *progname;
 
 int main(int argc, char *argv[]) {