$NetBSD: patch-ag,v 1.31 2022/12/02 15:06:22 jperkin Exp $

Ensure lib contains symbols.

--- configure.ac.orig	2022-03-06 16:31:23.000000000 +0000
+++ configure.ac
@@ -473,7 +473,8 @@ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]],
 CC_ATTRIBUTE_ALIGNED
 
 CC_ATTRIBUTE_VISIBILITY([protected],
-                        [visibility_export="protected"],
+                        [visibility_export="protected"
+                         CC_ATTRIBUTE_VISIBILITY([default])],
                         [CC_ATTRIBUTE_VISIBILITY([default], [visibility_export="default"])])
 CC_ATTRIBUTE_VISIBILITY([internal])
 
@@ -1187,6 +1188,7 @@ AC_CHECK_FUNCS([strncasecmp _strnicmp],
 
 AC_FUNC_FSEEKO
 
+AC_LIBOBJ(dummy)
 AC_REPLACE_FUNCS([asprintf basename gettimeofday setenv strcasestr strlcat strlcpy strndup strpbrk strsep strtok_r swab timegm unsetenv memmem])
 
 AC_LIBSOURCE([hstrerror.c])