From 9fcef4932c9323b085984f8a087045fef70103f5 Mon Sep 17 00:00:00 2001
From: Remi Gacogne <remi.gacogne@powerdns.com>
Date: Wed, 21 Jun 2023 14:58:15 +0200
Subject: [PATCH] Stop using the now deprecated ERR_load_CRYPTO_strings() to
 detect OpenSSL

And move to BN_new() instead, which has been present since at least
0.9.6 and is still in 3.1.
---
 m4/pdns_check_libcrypto.m4 | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/m4/pdns_check_libcrypto.m4 b/m4/pdns_check_libcrypto.m4
index 8e1219a3e7..1fa4f23bda 100644
--- a/m4/pdns_check_libcrypto.m4
+++ b/m4/pdns_check_libcrypto.m4
@@ -108,7 +108,7 @@ AC_DEFUN([PDNS_CHECK_LIBCRYPTO], [
     LIBS="$LIBCRYPTO_LIBS $LIBS"
     CPPFLAGS="$LIBCRYPTO_INCLUDES $CPPFLAGS"
     AC_LINK_IFELSE(
-        [AC_LANG_PROGRAM([#include <openssl/crypto.h>], [ERR_load_CRYPTO_strings()])],
+        [AC_LANG_PROGRAM([#include <openssl/bn.h>], [BN_new()])],
         [
             AC_MSG_RESULT([yes])
             AC_CHECK_FUNCS([RAND_bytes RAND_pseudo_bytes CRYPTO_memcmp OPENSSL_init_crypto EVP_MD_CTX_new EVP_MD_CTX_free RSA_get0_key])
-- 
2.47.2