Update AC_WARN->AC_MSG_WARN. #23878.

diff --git a/configure.ac b/configure.ac
index fbe0fa5ec42b9af1fdd58556a0d4e56e29590dd6..9c9ea11c73e67a639f65a789c8eeecfd55314982 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -1839,7 +1839,7 @@ AS_CASE([$malloc],
   ],
 
   [openbsd], [
-    AC_WARN([The openbsd malloc port is deprecated in Tor 0.3.5 and will be removed in a future version.])
+    AC_MSG_WARN([The openbsd malloc port is deprecated in Tor 0.3.5 and will be removed in a future version.])
     enable_openbsd_malloc=yes
   ],