+m4_version_prereq([2.52g])
+
+
+# AT_DATA_GRAMMAR_PROLOGUE
+# ------------------------
+# The prologue that should be included in any grammar which parser is
+# meant to be compiled.
+m4_define([AT_DATA_GRAMMAR_PROLOGUE],
+[[%{
+#if HAVE_CONFIG_H
+# include <config.h>
+ /* We don't need perfect functions for these tests. */
+# undef malloc
+# undef memcmp
+# undef realloc
+#endif
+%}]
+])
+
+
+# AT_DATA_GRAMMAR(NAME, CONTENT)
+# ------------------------------
+# Generate the file NAME, which CONTENT is preceded by
+# AT_DATA_GRAMMAR_PROLOGUE.
+m4_define([AT_DATA_GRAMMAR],
+[AT_DATA([$1],
+[AT_DATA_GRAMMAR_PROLOGUE
+$2])
+])
+
+
+# AT_COMPILE(OUTPUT, [SOURCES = OUTPUT.c])
+# ----------------------------------------
+#
+m4_define([AT_COMPILE],
+[AT_CHECK([$CC $CFLAGS $CPPFLAGS m4_default([$2], [$1.c]) -o $1], 0,
+ [], [ignore])])
+
+
+# AT_PARSER_CHECK(COMMAND, EXIT-STATUS, EXPOUT, EXPERR)
+# -----------------------------------------------------
+# So that we can run `./testsuite PREPARSER='valgrind -q' for instance.
+m4_define([AT_PARSER_CHECK],
+[AT_CHECK([$PREPARSER $1], [$2], [$3], [$4])])