$NetBSD: patch-configure.ac,v 1.2 2020/01/07 13:35:13 sborrill Exp $

- compat for OpenSSL 1.1 https://sourceforge.net/p/opendkim/patches/37/
- fix == bashism

--- configure.ac.orig	2015-05-12 19:43:09.000000000 +0100
+++ configure.ac	2020-01-07 13:30:01.000000000 +0000
@@ -860,26 +860,28 @@
 	AC_SEARCH_LIBS([ERR_peek_error], [crypto], ,
 	               AC_MSG_ERROR([libcrypto not found]))
 
-	AC_SEARCH_LIBS([SSL_library_init], [ssl], ,
-		[
-			if test x"$enable_shared" = x"yes"
-			then
-				AC_MSG_ERROR([Cannot build shared opendkim
-				              against static openssl libraries.
-				              Configure with --disable-shared
-				              to get this working or obtain a
-				              shared libssl library for
-				              opendkim to use.])
-			fi
 
-			# avoid caching issue - last result of SSL_library_init
-			# shouldn't be cached for this next check
-			unset ac_cv_search_SSL_library_init
-			LIBCRYPTO_LIBS="$LIBCRYPTO_LIBS -ldl"
-			AC_SEARCH_LIBS([SSL_library_init], [ssl], ,
-			               AC_MSG_ERROR([libssl not found]), [-ldl])
-		]
-	)
+	AC_LINK_IFELSE(
+		       [AC_LANG_PROGRAM([[#include <openssl/ssl.h>]],
+					[[SSL_library_init();]])],
+					[od_have_ossl="yes";],
+					[od_have_ossl="no";])
+	if test x"$od_have_ossl" = x"no"
+	then
+		if test x"$enable_shared" = x"yes"
+		then
+			AC_MSG_ERROR([Cannot build shared opendkim
+			              against static openssl libraries.
+			              Configure with --disable-shared
+			              to get this working or obtain a
+			              shared libssl library for
+			              opendkim to use.])
+		fi
+
+		LIBCRYPTO_LIBS="$LIBCRYPTO_LIBS -ldl"
+		AC_SEARCH_LIBS([SSL_library_init], [ssl], ,
+		               AC_MSG_ERROR([libssl not found]), [-ldl])
+	fi
 
 	AC_CHECK_DECL([SHA256_DIGEST_LENGTH],
                       AC_DEFINE([HAVE_SHA256], 1,
@@ -2184,7 +2186,7 @@
 	AC_MSG_ERROR([reputation requires libjansson])
 fi
 
-if test x"$jansson_found" == x"yes"
+if test x"$jansson_found" = x"yes"
 then
 	AC_DEFINE(USE_JANSSON, 1, [use libjansson to parse REPUTE replies])
 fi