Annoy_Leot found this. I had to change it. It is HOST_NAME_MAX. - geomyidae - A small C-based gopherd.
 (HTM) git clone git://bitreich.org/geomyidae/ git://enlrupgkhuxnvlhsf6lc3fziv5h2hhfrinws65d7roiv6bfj7d652fid.onion/geomyidae/
 (DIR) Log
 (DIR) Files
 (DIR) Refs
 (DIR) Tags
 (DIR) README
 (DIR) LICENSE
       ---
 (DIR) commit 37d8397b8e850f2ba35ae8d4a109360da294732f
 (DIR) parent 904c8907275f13139e91bf1c3179f745d69f7fac
 (HTM) Author: Christoph Lohmann <20h@r-36.net>
       Date:   Mon, 12 Nov 2018 22:42:00 +0100
       
       Annoy_Leot found this. I had to change it. It is HOST_NAME_MAX.
       
       Diffstat:
         M main.c                              |       2 +-
       
       1 file changed, 1 insertion(+), 1 deletion(-)
       ---
 (DIR) diff --git a/main.c b/main.c
       @@ -480,7 +480,7 @@ main(int argc, char *argv[])
                        usage();
        
                if (ohost == NULL) {
       -                /* Do not use MAX_NAME_HOST, it is not defined on NetBSD. */
       +                /* Do not use HOST_NAME_MAX, it is not defined on NetBSD. */
                        ohost = xcalloc(1, 256+1);
                        if (gethostname(ohost, 256) < 0) {
                                perror("gethostname");