Add a note to NEWS about ac_cv_header_stdlib_h not being set...

... even though HAVE_STDLIB_H is.

diff --git a/NEWS b/NEWS
index 93ac28384ca899bd9a0b447dbf478f78945f14ca..207d89b5a58f3e19c01540edf5d9d29eb33b95c6 100644 (file)
--- a/NEWS
+++ b/NEWS
@@ -146,6 +146,9 @@ GNU Autoconf NEWS - User visible changes.
   For compatibility’s sake, the C preprocessor macros STDC_HEADERS,
   HAVE_STDLIB_H, and HAVE_STRING_H are defined unconditionally.
   These preprocessor macros should be considered obsolescent.
+  However, cache variables like ac_cv_header_stdlib_h are not set;
+  this is intentional, so that AC_CHECK_HEADER([stdlib.h]) will still
+  do a test for the presence of stdlib.h, in case you genuinely need that.
 
   Future releases of Autoconf may reduce the set of headers checked
   for by AC_INCLUDES_DEFAULT.