** yacc.c: YYBACKUP works as expected.
-** glr.c: __attribute__ is preserved:
+** glr.c improvements:
+
+*** Location support is eliminated when not requested:
+
+ GLR parsers used to include location-related code even when
+ locations were not requested, and therefore not even usable.
+
+*** __attribute__ is preserved:
__attribute__ is no longer disabled when __STRICT_ANSI__ is defined
(i.e., when -std is passed to GCC).