---- syslog-ng-3.26.1/configure.ac.orig 2020-04-04 21:37:22.891000000 +0200
-+++ syslog-ng-3.26.1/configure.ac 2020-04-04 21:40:46.085000000 +0200
-@@ -767,11 +767,11 @@
- dnl ***************************************************************************
+diff -urNp -x '*.orig' syslog-ng-syslog-ng-4.2.0.org/configure.ac syslog-ng-syslog-ng-4.2.0/configure.ac
+--- syslog-ng-syslog-ng-4.2.0.org/configure.ac 2023-05-10 16:55:07.000000000 +0200
++++ syslog-ng-syslog-ng-4.2.0/configure.ac 2023-07-18 21:48:11.904414792 +0200
+@@ -817,11 +817,11 @@ dnl ************************************
dnl Checks for libraries
+ AC_CHECK_LIB(m, round, BASE_LIBS="$BASE_LIBS -lm")
AC_CHECK_LIB(door, door_create, BASE_LIBS="$BASE_LIBS -ldoor")
-AC_CHECK_LIB(socket, socket, BASE_LIBS="$BASE_LIBS -lsocket")
+AC_CHECK_FUNC([socket], [:], [AC_CHECK_LIB(socket, socket, BASE_LIBS="$BASE_LIBS -lsocket")])