** Detection of GNU M4 1.4.6 or newer during configure is improved.
-** Warnings from gcc's -Wundef option about undefined YYENABLE_NLS and
- YYLTYPE_IS_TRIVIAL in C/C++ parsers are now avoided.
+** Warnings from gcc's -Wundef option about undefined YYENABLE_NLS,
+ YYLTYPE_IS_TRIVIAL, and __STRICT_ANSI__ in C/C++ parsers are now
+ avoided.
** %code is now a permanent feature.