AC_PROG_CXX: document change

* NEWS: Document recent change to AC_PROG_CXX.

diff --git a/NEWS b/NEWS
index a9b2226e758c6ad1932d59e85b6973a2273f5ce8..974d48d82a522fdac3a617bef761a754d5de7fdc 100644 (file)
--- a/NEWS
+++ b/NEWS
@@ -21,7 +21,8 @@ GNU Autoconf NEWS - User visible changes.
   eliminate the need to specify ACLOCAL_AMFLAGS in Makefile.am.
 
 - AC_PROG_CC now prefers C11 if available, falling back on C99 and
-  then on C89 as before.
+  then on C89 as before.  Similarly, AC_PROG_CXX now prefers C++11
+  if available, falling back on C++98.
 
 - AC_PROG_CC is now defined via AC_DEFUN_ONCE, to avoid bloat in 'configure'.