From c48299989842a26380b3ea61b233aa60674ee079 Mon Sep 17 00:00:00 2001
From: "W.C.A. Wijngaards" <wouter@nlnetlabs.nl>
Date: Thu, 26 Jan 2023 10:54:38 +0100
Subject: [PATCH] - Fix acx_nlnetlabs.m4 for -Wstrict-prototypes.

---
 acx_nlnetlabs.m4 | 29 +++++++++++++++--------------
 doc/Changelog    |  3 +++
 2 files changed, 18 insertions(+), 14 deletions(-)

diff --git a/acx_nlnetlabs.m4 b/acx_nlnetlabs.m4
index cf436ec54..3d745727f 100644
--- a/acx_nlnetlabs.m4
+++ b/acx_nlnetlabs.m4
@@ -2,7 +2,8 @@
 # Copyright 2009, Wouter Wijngaards, NLnet Labs.   
 # BSD licensed.
 #
-# Version 44
+# Version 45
+# 2023-01-26 fix -Wstrict-prototypes.
 # 2022-09-01 fix checking if nonblocking sockets work on OpenBSD.
 # 2021-08-17 fix sed script in ssldir split handling.
 # 2021-08-17 fix for openssl to detect split version, with ssldir_include
@@ -187,7 +188,7 @@ dnl cache=`echo $1 | sed 'y%.=/+- %___p__%'`
 AC_CACHE_VAL(cv_prog_cc_flag_needed_$cache,
 [
 echo '$2' > conftest.c
-echo 'void f(){}' >>conftest.c
+echo 'void f(void){}' >>conftest.c
 if test -z "`$CC $CPPFLAGS $CFLAGS $ERRFLAG -c conftest.c 2>&1`"; then
 eval "cv_prog_cc_flag_needed_$cache=no"
 else
@@ -233,7 +234,7 @@ dnl DEPFLAG: set to flag that generates dependencies.
 AC_DEFUN([ACX_DEPFLAG],
 [
 AC_MSG_CHECKING([$CC dependency flag])
-echo 'void f(){}' >conftest.c
+echo 'void f(void){}' >conftest.c
 if test "`$CC -MM conftest.c 2>&1`" = "conftest.o: conftest.c"; then
 	DEPFLAG="-MM"
 else 
@@ -272,7 +273,7 @@ ACX_CHECK_COMPILER_FLAG_NEEDED($C99FLAG -D__EXTENSIONS__ -D_BSD_SOURCE -D_DEFAUL
 #include <getopt.h>
 #endif
 
-int test() {
+int test(void) {
 	int a;
 	char **opts = NULL;
 	struct timeval tv;
@@ -309,7 +310,7 @@ ACX_CHECK_COMPILER_FLAG_NEEDED($C99FLAG -D__EXTENSIONS__ -D_BSD_SOURCE -D_DEFAUL
 #include <getopt.h>
 #endif
 
-int test() {
+int test(void) {
 	int a;
 	char **opts = NULL;
 	struct timeval tv;
@@ -335,7 +336,7 @@ ACX_CHECK_COMPILER_FLAG_NEEDED($C99FLAG,
 [
 #include <stdbool.h>
 #include <ctype.h>
-int test() {
+int test(void) {
         int a = 0;
         return a;
 }
@@ -345,7 +346,7 @@ ACX_CHECK_COMPILER_FLAG_NEEDED(-D_BSD_SOURCE -D_DEFAULT_SOURCE,
 [
 #include <ctype.h>
 
-int test() {
+int test(void) {
         int a;
         a = isascii(32);
         return a;
@@ -356,7 +357,7 @@ ACX_CHECK_COMPILER_FLAG_NEEDED(-D_GNU_SOURCE,
 [
 #include <netinet/in.h>
 
-int test() {
+int test(void) {
         struct in6_pktinfo inf;
 	int a = (int)sizeof(inf);
         return a;
@@ -370,7 +371,7 @@ ACX_CHECK_COMPILER_FLAG_NEEDED(-D_GNU_SOURCE -D_FRSRESGID,
 [
 #include <unistd.h>
 
-int test() {
+int test(void) {
 	int a = setresgid(0,0,0);
 	a = setresuid(0,0,0);
         return a;
@@ -385,7 +386,7 @@ ACX_CHECK_COMPILER_FLAG_NEEDED(-D_POSIX_C_SOURCE=200112,
 #endif
 #include <netdb.h>
 
-int test() {
+int test(void) {
         int a = 0;
         char *t;
         time_t time = 0;
@@ -413,7 +414,7 @@ ACX_CHECK_COMPILER_FLAG_NEEDED(-D__EXTENSIONS__,
 #include <getopt.h>
 #endif
 
-int test() {
+int test(void) {
         int a;
         char **opts = NULL;
         struct timeval tv;
@@ -834,7 +835,7 @@ dnl try to see if an additional _LARGEFILE_SOURCE 1 is needed to get fseeko
 ACX_CHECK_COMPILER_FLAG_NEEDED(-D_LARGEFILE_SOURCE=1,
 [
 #include <stdio.h>
-int test() {
+int test(void) {
         int a = fseeko(stdin, 0, 0);
         return a;
 }
@@ -859,7 +860,7 @@ char* (*f) () = getaddrinfo;
 #ifdef __cplusplus
 }
 #endif
-int main() {
+int main(void) {
         ;
         return 0;
 }
@@ -923,7 +924,7 @@ cache=`echo $1 | sed 'y%.=/+-%___p_%'`
 AC_CACHE_VAL(cv_cc_deprecated_$cache,
 [
 echo '$3' >conftest.c
-echo 'void f(){ $2 }' >>conftest.c
+echo 'void f(void){ $2 }' >>conftest.c
 if test -z "`$CC $CPPFLAGS $CFLAGS -c conftest.c 2>&1 | grep -e deprecated -e unavailable`"; then
 eval "cv_cc_deprecated_$cache=no"
 else
diff --git a/doc/Changelog b/doc/Changelog
index 6136c6b60..516b69a49 100644
--- a/doc/Changelog
+++ b/doc/Changelog
@@ -1,3 +1,6 @@
+26 January 2023: Wouter
+	- Fix acx_nlnetlabs.m4 for -Wstrict-prototypes.
+
 23 January 2023: George
 	- Fix #833: [FR] Ability to set the Redis password.
 
-- 
2.47.3