* configure.ac (AC_GNU_SOURCE): Use it instead of hand written code.

(O0FLAGS): New.
(VALGRIND, GXX): New.
* tests/atlocal.in (CFLAGS): Use O0FLAGS.
* tests/bison.in: Run $PREBISON a pre-command.
* tests/Makefile.am (maintainer-check, maintainer-check-valgrind)
(maintainer-check-g++): New.
* Makefile.am (maintainer-check): New.

tests/Makefile.am

@@ -71,3 +71,23 @@ check_SCRIPTS = bison
 # Run the test suite on the *installed* tree.
 installcheck-local:
 	$(SHELL) $(TESTSUITE) AUTOTEST_PATH=$(exec_prefix)/bin
+
+# Be real mean with it.
+.PHONY: maintainer-check-valgrind
+maintainer-check-valgrind: $(TESTSUITE)
+	if test -n "$(VALGRIND)"; then					    \
+	   $(TESTSUITE) PREBISON='$(VALGRIND) -q' PREPARSER='$(VALGRIND) -q'; \
+	else								    \
+	  true;								    \
+	fi
+
+.PHONY: maintainer-check-g++
+maintainer-check-g++: $(TESTSUITE)
+	if test -n "$(VALGRIND)"; then		\
+	   $(TESTSUITE) CC='$(GXX)'		\
+	else					\
+	  true;					\
+	fi
+
+.PHONY: maintainer-check
+maintainer-check: maintainer-check-valgrind maintainer-check-g++

tests/atlocal.in

@@ -1,10 +1,12 @@
 # @configure_input@					-*- shell-script -*-
 # Configurable variable values for Bison test suite.
-# Copyright 2000, 2001, 2002 Free Software Foundation, Inc.
+# Copyright (C) 2000, 2001, 2002 Free Software Foundation, Inc.
 
 # We need a C compiler.
 CC='@CC@'
-CFLAGS='@CFLAGS@ @WARNING_CFLAGS@ @WERROR_CFLAGS@'
+
+# We want no optimization.
+CFLAGS='@O0CFLAGS@ @WARNING_CFLAGS@ @WERROR_CFLAGS@'
 
 # We need `config.h'.
 CPPFLAGS="-I$abs_top_builddir @CPPFLAGS@"

tests/bison.in

@@ -5,4 +5,4 @@
 # We want to use the files shipped with Bison.
 BISON_PKGDATADIR='@abs_top_srcdir@/data'
 export BISON_PKGDATADIR
-exec '@abs_top_builddir@/src/bison' ${1+"$@"}
+exec $PREBISON '@abs_top_builddir@/src/bison' ${1+"$@"}