from :
https://github.com/quantcast/qfs/commit/f035a9569e61ae8dca3182e57c2380b4505cb6ee.patch
reported :
https://github.com/wahern/cqueues/issues/261
https://github.com/wahern/cqueues/pull/264.patch
From f035a9569e61ae8dca3182e57c2380b4505cb6ee Mon Sep 17 00:00:00 2001
From: Mike Ovsiannikov <movsiannikov@quantcast.com>
Date: Fri, 21 Apr 2023 22:40:51 -0700
Subject: [PATCH] Ext DNS: add function pointers prototypes in order to
 eliminate warnings.

--- a/src/lib/dns.c
+++ b/src/lib/dns.c
@@ -3962,29 +3962,34 @@ size_t dns_txt_print(void *_dst, size_t lim, struct dns_txt *txt) {
 	return dns_b_strllen(&dst);
 } /* dns_txt_print() */
 
+typedef int (*parse_t)(void *any, struct dns_rr *rr, struct dns_packet *P);
+typedef int (*push_t)(struct dns_packet *P, void *any);
+typedef int (*cmp_t)(const void *a, const void *b);
+typedef size_t (*print_t)(void *_dst, size_t lim, void *any);
+typedef size_t (*cname_t)(void *_dst, size_t lim, void *any);
 
 static const struct dns_rrtype {
 	enum dns_type type;
 	const char *name;
 	union dns_any *(*init)(union dns_any *, size_t);
-	int (*parse)();
-	int (*push)();
-	int (*cmp)();
-	size_t (*print)();
-	size_t (*cname)();
+	parse_t parse;
+	push_t push;
+	cmp_t cmp;
+	print_t print;
+	cname_t cname;
 } dns_rrtypes[]	= {
-	{ DNS_T_A,      "A",      0,                 &dns_a_parse,      &dns_a_push,      &dns_a_cmp,      &dns_a_print,      0,                },
-	{ DNS_T_AAAA,   "AAAA",   0,                 &dns_aaaa_parse,   &dns_aaaa_push,   &dns_aaaa_cmp,   &dns_aaaa_print,   0,                },
-	{ DNS_T_MX,     "MX",     0,                 &dns_mx_parse,     &dns_mx_push,     &dns_mx_cmp,     &dns_mx_print,     &dns_mx_cname,    },
-	{ DNS_T_NS,     "NS",     0,                 &dns_ns_parse,     &dns_ns_push,     &dns_ns_cmp,     &dns_ns_print,     &dns_ns_cname,    },
-	{ DNS_T_CNAME,  "CNAME",  0,                 &dns_cname_parse,  &dns_cname_push,  &dns_cname_cmp,  &dns_cname_print,  &dns_cname_cname, },
-	{ DNS_T_SOA,    "SOA",    0,                 &dns_soa_parse,    &dns_soa_push,    &dns_soa_cmp,    &dns_soa_print,    0,                },
-	{ DNS_T_SRV,    "SRV",    0,                 &dns_srv_parse,    &dns_srv_push,    &dns_srv_cmp,    &dns_srv_print,    &dns_srv_cname,   },
-	{ DNS_T_OPT,    "OPT",    &dns_opt_initany,  &dns_opt_parse,    &dns_opt_push,    &dns_opt_cmp,    &dns_opt_print,    0,                },
-	{ DNS_T_PTR,    "PTR",    0,                 &dns_ptr_parse,    &dns_ptr_push,    &dns_ptr_cmp,    &dns_ptr_print,    &dns_ptr_cname,   },
-	{ DNS_T_TXT,    "TXT",    &dns_txt_initany,  &dns_txt_parse,    &dns_txt_push,    &dns_txt_cmp,    &dns_txt_print,    0,                },
-	{ DNS_T_SPF,    "SPF",    &dns_txt_initany,  &dns_txt_parse,    &dns_txt_push,    &dns_txt_cmp,    &dns_txt_print,    0,                },
-	{ DNS_T_SSHFP,  "SSHFP",  0,                 &dns_sshfp_parse,  &dns_sshfp_push,  &dns_sshfp_cmp,  &dns_sshfp_print,  0,                },
+	{ DNS_T_A,      "A",      0,                 (parse_t)&dns_a_parse,      (push_t)&dns_a_push,      (cmp_t)&dns_a_cmp,      (print_t)&dns_a_print,      0,                },
+	{ DNS_T_AAAA,   "AAAA",   0,                 (parse_t)&dns_aaaa_parse,   (push_t)&dns_aaaa_push,   (cmp_t)&dns_aaaa_cmp,   (print_t)&dns_aaaa_print,   0,                },
+	{ DNS_T_MX,     "MX",     0,                 (parse_t)&dns_mx_parse,     (push_t)&dns_mx_push,     (cmp_t)&dns_mx_cmp,     (print_t)&dns_mx_print,     (cname_t)&dns_mx_cname,    },
+	{ DNS_T_NS,     "NS",     0,                 (parse_t)&dns_ns_parse,     (push_t)&dns_ns_push,     (cmp_t)&dns_ns_cmp,     (print_t)&dns_ns_print,     (cname_t)&dns_ns_cname,    },
+	{ DNS_T_CNAME,  "CNAME",  0,                 (parse_t)&dns_cname_parse,  (push_t)&dns_cname_push,  (cmp_t)&dns_cname_cmp,  (print_t)&dns_cname_print,  (cname_t)&dns_cname_cname, },
+	{ DNS_T_SOA,    "SOA",    0,                 (parse_t)&dns_soa_parse,    (push_t)&dns_soa_push,    (cmp_t)&dns_soa_cmp,    (print_t)&dns_soa_print,    0,                },
+	{ DNS_T_SRV,    "SRV",    0,                 (parse_t)&dns_srv_parse,    (push_t)&dns_srv_push,    (cmp_t)&dns_srv_cmp,    (print_t)&dns_srv_print,    (cname_t)&dns_srv_cname,   },
+	{ DNS_T_OPT,    "OPT",    &dns_opt_initany,  (parse_t)&dns_opt_parse,    (push_t)&dns_opt_push,    (cmp_t)&dns_opt_cmp,    (print_t)&dns_opt_print,    0,                },
+	{ DNS_T_PTR,    "PTR",    0,                 (parse_t)&dns_ptr_parse,    (push_t)&dns_ptr_push,    (cmp_t)&dns_ptr_cmp,    (print_t)&dns_ptr_print,    (cname_t)&dns_ptr_cname,   },
+	{ DNS_T_TXT,    "TXT",    &dns_txt_initany,  (parse_t)&dns_txt_parse,    (push_t)&dns_txt_push,    (cmp_t)&dns_txt_cmp,    (print_t)&dns_txt_print,    0,                },
+	{ DNS_T_SPF,    "SPF",    &dns_txt_initany,  (parse_t)&dns_txt_parse,    (push_t)&dns_txt_push,    (cmp_t)&dns_txt_cmp,    (print_t)&dns_txt_print,    0,                },
+	{ DNS_T_SSHFP,  "SSHFP",  0,                 (parse_t)&dns_sshfp_parse,  (push_t)&dns_sshfp_push,  (cmp_t)&dns_sshfp_cmp,  (print_t)&dns_sshfp_print,  0,                },
 	{ DNS_T_AXFR,   "AXFR",   0,                 0,                 0,                0,               0,                 0,                },
 }; /* dns_rrtypes[] */
 
@@ -8872,7 +8877,7 @@ struct {
 	const char *qname;
 	enum dns_type qtype;
 
-	int (*sort)();
+	int (*sort)(struct dns_rr *a, struct dns_rr *b, struct dns_rr_i *i, struct dns_packet *P);
 
 	int verbose;
 } MAIN = {
--- a/src/lib/dns.h
+++ b/src/lib/dns.h
@@ -538,7 +538,7 @@ struct dns_rr_i {
 
 	int follow;
 
-	int (*sort)();
+	int (*sort)(struct dns_rr *a, struct dns_rr *b, struct dns_rr_i *i, struct dns_packet *P);
 	unsigned args[2];
 
 	struct {