-# getline.m4 serial 16
+# getline.m4 serial 17
dnl Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2005, 2006, 2007 Free
dnl Software Foundation, Inc.
AC_REQUIRE([gl_STDIO_H_DEFAULTS])
dnl Persuade glibc <stdio.h> to declare getline().
- AC_REQUIRE([AC_GNU_SOURCE])
+ AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
AC_CHECK_DECLS_ONCE([getline])