-- Change tests/bison to run `valgrind -q bison' to run Bison under
- Valgrind.
-
-- Run the test suite with `./testsuite PREPARSER='valgrind -q' to make
- sure the parser behave properly.
+- run `make maintainer-check' which:
+ - runs `valgrind -q bison' to run Bison under Valgrind.
+ - runs the parsers under Valdrind.
+ - runs the test suite with G++ as C compiler...